Способ и колонна абсорбционной очистки газов от нежелательных примесей

Изобретение может быть использовано для очистки газовых потоков от примесей в широком диапазоне концентраций, а также для разделения газовых смесей на индивидуальные компоненты на предприятиях нефтяной, газовой, химической и других отраслей промышленности. Предложен способ абсорбционной очистки газов от нежелательных примесей, включающий противоточный контакт очищаемого газа и регенерированного абсорбента в массообменной колонне с получением очищенного газа и насыщенного абсорбента, и колонна для его реализации, насадочное контактное устройство которой разделено по высоте на самостоятельные массообменные секции с противоточным или перекрестноточным движением очищаемого газа и регенерированного абсорбента, при этом поток очищаемого газа последовательно проходит через все самостоятельные массообменные секции массообменной колонны снизу вверх, поток регенерированного абсорбента вводится в верхнюю часть каждой самостоятельной массообменной секции, а поток насыщенного абсорбента выводится из ...

ВОДНАЯ АЛКАНОЛАМИНОВАЯ АБСОРБИРУЮЩАЯ КОМПОЗИЦИЯ, СОДЕРЖАЩАЯ ПИПЕРАЗИН ДЛЯ УЛУЧШЕННОГО УДАЛЕНИЯ СЕРОВОДОРОДА ИЗ ГАЗОВЫХ СМЕСЕЙ, И СПОСОБ ЕЕ ИСПОЛЬЗОВАНИЯ

Изобретение относится к водному раствору алканоламина для удаления сероводорода из газовых смесей, содержащих сероводород. Водный раствор алканоламина для удаления кислых газов, включающих в себя сероводород, из газовых смесей, содержащих сероводород, содержит:(i) от 20 до 50 массовых процентов 3-(диметиламин)-1,2-пропандиола или 3-(диэтиламин)-1,2-пропандиола, и (ii) от 2 до 10 массовых процентов пиперазина, при этом массовый процент берется в расчете на общую массу водного раствора алканоламина и при этом упомянутый водный раствор алканоламина не содержит ортофосфорную кислоту, фосфорную кислоту, соляную кислоту, серную кислоту, сернистую кислоту, азотную кислоту, пирофосфорную кислоту, теллуровую кислоту, уксусную кислоту, муравьиную кислоту, адипиновую кислоту, бензойную кислоту, н-бутановую кислоту, монохлоруксусную кислоту, лимонную кислоту, глутаровую кислоту, молочную кислоту, малоновую кислоту, щавелевую кислоту, о-фталевую кислоту, янтарную кислоту, о-толуиловую кислоту. Заявлен ...

СПОСОБ РАЗДЕЛЕНИЯ ГАЗОВ НА МОРСКИХ СООРУЖЕНИЯХ

... 1. Установка для добычи нефтяной текучей среды на морской платформе, включающая блок циклической очистки природного газа посредством поглощения амином, для отделения кислых газов от добытого нефтяного газа; указанный блок содержит абсорбционную колонну и регенерационную колонну, через которые циркулирует водный раствор аминового поглотителя, с целью поглощения кислых газов из газа в абсорбционной колонне и десорбции кислых газов в регенерационной колонне, чтобы получить поток очищенного газа и по меньшей мере один поток кислого газа, удаленного из газа; водный раствор аминового поглотителя включает водный раствор в сильной степени пространственно-затрудненного аминоэфира формулы:R-NH-[CH-O-]-CH-Yгде Rпредставляет собой вторичную или третичную алкильную группу из 2-8 атомов углерода, Y представляет собой Н или алкильную группу из 1-6 атомов углерода, и х является положительным целым числом от 3 до 6.2. Установка для добычи нефтяной текучей среды на морской платформе по п. 1, где Rпредставляет ...

Способ обработки аминами для селективного отделения кислых газов

... 1. Способ селективного отделения HS от смеси кислых газов, содержащей HS и CO, который включает контактирование газовой смеси с соединением формулы:где Rявляется С-Салкильной группой,Rи Rкаждый является С-Салкильной группой,Rявляется ОН или OR,Rявляется -CH-CRR-NHR, иn является целым числом от 1 до 4.2. Способ по п. 1, в котором Rявляется СН.3. Способ по п. 1, в котором Rи Rкаждый является СНили СН.4. Способ по п. 1, в котором по меньшей мере один из R, Rи Rявляется третичной алкильной группой.5. Способ по п. 1, в котором Rявляется третичной алкильной группой.6. Способ по п. 1, в котором Rявляется третичным бутилом.7. Способ по п. 1, в котором Rявляется ОН.8. Способ по п. 1, в котором n является целым числом от 1 до 4, предпочтительно 1-3.9. Способ по п. 1, в котором Rявляется СН, Rи Rявляются СНили СН, Rявляется ОН и n=1.10. Способ по п. 1, в котором соединение представляет собой 2-(N-метиламино)-2-метилпропан-1-ол.11. Способ по п. 1, в котором смесь кислых газов контактирует с водным ...

ДЕЗОДОРИРУЮЩАЯ СЕРООЧИСТКА ПРИРОДНОГО ГАЗА ПОСРЕДСТВОМ МЕМБРАННОГО КОНТАКТНОГО АППАРАТА

УСТАНОВКА ДЛЯ ПОЛУЧЕНИЯ ДВУОКИСИ УГЛЕРОДА ИЗ ДЫМОВОГО ГАЗА

... 1. Установка для получения двуокиси углерода из дымовых газов, содержащая ! абсорбер, который приводит абсорбент CO2, который абсорбирует CO2, содержащуюся в дымовых газах, выбрасываемых из промышленного оборудования, в контакт с дымовыми газами для получения из дымовых газов CO2; ! регенератор, который удаляет CO2 из абсорбента CO2, который подают из абсорбера через первый питающий трубопровод и который абсорбирует CO2 для регенерации абсорбента CO2; ! по меньшей мере, два кипятильника с падающей пленкой, которые отводят абсорбент CO2 из места вблизи днища регенератора и подогревает абсорбент CO2 с помощью водяного пара; ! первый парожидкостный сепаратор, который разделяет абсорбент CO2, подогретый с помощью кипятильника с падающей пленкой, на абсорбент CO2 и пар, содержащий CO2; и ! второй питающий трубопровод для подачи отделенного абсорбента CO2 в абсорбер. ! 2. Установка по п.1, в которой предусмотрен ! конденсатор, который конденсирует водяной пар из газа, содержащего CO2, несущего ...

СПОСОБ ОСУШКИ ПРИРОДНОГО ГАЗА ПУТЕМ СОВМЕСТНОГО ОХЛАЖДЕНИЯ РАСТВОРИТЕЛЯ И ПРИРОДНОГО ГАЗА

... 1. Способ осушки природного газа (1) путем совместного охлаждения растворителя (9) и природного газа (1), в котором- растворитель (9), освобожденный от воды в блоке (26) регенерации растворителя подают на осушку газа, и- подаваемый газ (1) пропускают через две или более камеры (20, 22, 24) охлаждения, соединенные последовательно, причем в каждую из камер (20, 22, 24) охлаждения подают поток (9, 10, 12) растворителя, который удаляет воду из газа (1, 3, 5), поступающего в соответствующую камеру (20, 22, 24) охлаждения, и- смешанный поток (2, 4, 6), состоящий из газа и растворителя, поступает в каждую из этих камер (20, 22, 24) охлаждения, проходит через соответствующую камеру (20, 22, 24) охлаждения и, после совместного охлаждения в соответствующей камере (20, 22, 24) охлаждения, его разделяют с помощью соответствующего газожидкостного сепаратора (21, 23, 25), соединенного с соответствующей камерой (20, 22, 24) охлаждения на выходе, на поток (3, 5, 7) газа с пониженным содержанием воды и ...

Novel process designs for increased selectivity and capacity for hydrogen sulfide capture from acid gases

A system and process for selectively separating H ...

PORTABLE CARBON DIOXIDE ABSORPTION SYSTEM

Various embodiments of a portable carbon dioxide (C02) absorption device that may remove excess C02 from a closed environment are disclosed herein. The absorption device is reusable and configured for many environments. WO 2018/236423 1/27 PCT/US2018/016966 005 -00 ...

Absorbing solution, and method and apparatus for the removal of CO2 or H2S or both

Method and device for recovering carbon dioxide

A change in the amount of an absorbing solution is detected to restore the original amount, and carbon dioxide is stably recovered from a discharge gas. This device for recovering carbon dioxide includes: an absorption tower in which a gas is brought into contact with an absorbing solution to cause the absorbing solution to absorb the carbon dioxide contained therein; and a regeneration tower in which the absorbing solution that has absorbed the carbon dioxide is heated, thereby causing the absorbing solution to release the carbon dioxide and regenerating the absorbing solution. The water vapor contained in a recovered gas which contains carbon dioxide and is discharged from the regeneration tower is recovered as condensed water by a recovery means, and the condensed water is supplied at a given flow rate to the absorbing solution present in the regeneration tower. The device further includes: a liquid-level meter which detects the liquid level that changes in accordance with fluctuations ...

Method for separating acid gases using metal-organic frameworks impregnated with amines

The present invention relates to a method for separating at least one acid gas from a gas mixture, containing the step of bringing the gas mixture into contact with a porous metal-organic framework, the framework adsorbing the at least one acid gas, and the framework containing at least one at least bidentate organic compound coordinatively bonded to at least one metal ion, characterized in that the porous metal-organic framework is impregnated with an amine suitable for gas scrubbing. The invention further relates to such impregnated metal-organic frameworks.

Acid gas removal apparatus and acid gas removal method

An acid gas removal apparatus of one embodiment includes: an absorption tower bringing gas containing acid gas into contact with an acid gas absorbent of a 5 solution containing a thermosensitive nitrogen-containing compound (formula (1)) and having LCST at a predetermined temperature to absorb the acid gas into the absorbent and remove the acid gas from the gas; a first heater heating the absorbent to LCST of the solution or more; a tank phase-separating the absorbent into a rich absorbent phase and a lean absorbent phase whose content of the thermosensitive compound is higher; a 10 second heater heating the rich phase; a regeneration tower releasing the acid gas in the rich phase; a third heater provided at the regeneration tower heating the rich phase. [Formula 1] ... (1) (R1 is hydroxyalkyl group, R2 is non-substituted cyclic alkyl group whose carbon 15 number is 3-10, R3 is hydrogen atom or non-substituted alkyl group.) 6053631_1 (GHMatters) P98572AU LYNT co rV q co ...

Methods and systems for deacidizing gaseous mixtures

Removal of hydrogen sulphide and carbon dioxide from a stream of fluid

The invention relates to a method for removing hydrogen sulphide and carbon dioxide from a stream of fluid, the method comprising: a) an absorption step, in which the stream of fluid is brought into contact with an absorption agent comprising an aqueous solution (i) of an amine of general formula (I), where R ...

Composite amine absorption solution, and method and device for removing CO2 and/or H2S

A composite amine absorption solution absorbs the CO ...

Gas separation apparatus and packing

GAS SEPARATION APPARATUS AND PACKING A gas separation apparatus (1) which causes an absorbent (L) to flow down along a surface of a packing (3) arranged in a treatment chamber (2) and supplies to the treatment chamber (2) a gas to be treated (G) containing a target gas component so that the absorbent (L) flowing down along the surface of the packing (3) and the gas to be treated (G) are brought into gas-liquid contact, thereby the target gas component contained in the gas to be treated (G) is absorbed in the absorbent (L) to separate or recover from the gas to be treated (G), wherein the packing (3) comprises at least one packing unit formed of a plurality of expanded metal plates (31) standing vertically and being aligned, the plurality of expanded metal plates (31) are formed of strands which are inclined at an angle 0 (0 < 0 < 900) with respect to a vertical direction and the angle 0 is 50 to 700.

Acid gas regenerable battery

A method of generating electricity from an amine-based acid gas capture process using an electrolytic cell containing an anode and a cathode and an amine based electrolyte comprising: contacting a metal based redox material with an amine based electrolyte in the presence of an anode to form a metal- ammine complex in solution; adding an absorbed or absorbable acid gas to the metal-ammine complex containing electrolyte to form an acid gas absorbed electrolyte; and contacting the acid gas absorbed electrolyte with a cathode deposit, wherein the acid gas breaks up the metal-ammine complex in the metal-ammine complex containing electrolyte thereby generating a potential difference between the anode and the cathode.

CARBON DIOXIDE-ABSORBING SOLUTION AND METHOD OF RECOVERING CARBON DIOXI DE

A method for the recovery of carbon dioxide (CO2) which comprises: bringing, in an absorption tower, a gas to be treated into contact with a CO2-absorbing solution set forth in claim 1 to form a CO2-rich solution, said gas containing both CO2 and oxygen; circulating the CO2-rich solution in a regeneration tower to heat and discharge the CO2 and thus recover the same; returning the obtained CO2-poor solution to the absorption tower; and conducting heat exchange between the solution transferred from the absorption tower to the regeneration tower and the solution returned from the regeneration tower to the absorption tower. The method is characterized by: adding either a silicone oil and/or an aqueous alkanolamine solution in which an organosulfur compound represented by general formula (A) or (B) is dissolved to the solution present in the absorption tower and/or the solution returned from the regeneration tower to the absorption tower; and controlling the composition of the absorbing solution ...

METHOD AND DEVICE FOR THE ABSORPTIVE REMOVAL OF CARBON DIOXIDE FROM BIOGAS

The invention relates to a method for the absorptive removal of carbon dioxide from biogas using a scrubbing liquid in which carbon dioxide is chemically bound and a device suitable for carrying out the method. Proceeding from the disadvantages of the known prior art, a method is to be provided with which the loss of methane is decreased. For this purpose, as a solution it is proposed that the loaded scrubbing liquid occurring after the absorption is heated to a temperature at which liberation of CO2 begins. Immediately thereafter, the loaded scrubbing liquid is fed to at least one centrifugal separator (11) for separating off the gas phase from the liquid phase, wherein methane and dissolved fractions of CO2 escape via the gas phase. After separation is complete, the gas phase is passed into the absorber unit (1) and the liquid phase is further heated to the temperature required for desorption and fed to the desorption unit (16) for regeneration.

SYSTEM AND PROCESS OF CAPTURING CARBON DIOXIDE FROM FLUE GASES

A system and a process for capturing Carbon Dioxide (CO2) from flue gases are disclosed. The process comprises feeding a flue gas comprising CO2 to at least one Rotary Packed Bed (RPB) absorber rotating circularly. A solvent may be provided through an inner radius of the RPB absorber. The solvent may move towards an outer radius of the RPB absorber. The solvent may react with the flue gas in a counter-current flow. The process further includes passing the flue gas through at least one of a water wash and an acid wash to remove traces of the solvent present in the flue gas. Finally, the solvent reacted with the CO2 may be thermally regenerated for re-utilizing the solvent back in the process.

ABSORBENT LIQUID FOR CO2 AND/OR H2S, AND APPARATUS AND METHOD USING SAME

The present invention provides: an absorbent liquid for CO2 and/or H2S, which is capable of reducing the amount of reboiler heat when the absorbent liquid is recycled; and an apparatus and a method, which use this absorbent liquid. An absorbent liquid according to the present invention absorbs CO2 and/or H2S in a gas, and contains, as constituents, (a) a secondary linear monoamine, (b1) a tertiary linear monoamine or (b2) a hindered primary monoamine, and (c) a secondary cyclic diamine. The concentrations of these constituents are less than 30% by weight.

ABSORPTION LIQUID REGENERATION APPARATUS, C02 RECOVERY APPARATUS INCLUDING THE SAME, AND ABSORPTION LIQUID REGENERATION METHOD

This absorption liquid regeneration device is characterized by comprising: a regeneration tower for regenerating a CO2 absorption liquid; a return flow water drum that is structured so as to separate an emitted gas from the regeneration tower into a CO2 gas and condensed water and cause the condensed water to flow back to the regeneration tower; and a cleaning section that is provided within a gas phase section of the return flow water drum, or on a CO2 flow path along which the CO2 gas that has flowed out from the gas phase section flows, and is structured so as to use a cleaning liquid to remove a CO2 absorption agent included in the CO2 gas, wherein the cleaning liquid has a lower concentration of the CO2 absorption agent compared to the condensed water that has accumulated in a liquid phase section of the return flow water drum.

CO2 RECOVERY DEVICE AND CO2 RECOVERY METHOD

The present invention includes: a CO2 absorption part 141 including a first absorption section 141A for absorbing CO2 from exhaust gas and a second absorption section 141B that is located below the first absorption section 141A, arranged vertically within a CO2 absorption tower 14 for absorbing CO2 from exhaust gas 11B containing CO2; and a first absorption liquid extraction line L11 that is provided between the first absorption section 141A and the second absorption section 141B, and that is for extracting, from the absorption tower 14, a CO2 absorption liquid that has absorbed CO2 in the exhaust gas at the first absorption section 141A, and for resupplying the CO2 absorption liquid after being cooled to the second absorption section 141B within the absorption tower 14, wherein an extraction position X of the first absorption liquid extraction line L11 for extracting the CO2 absorption liquid from the absorption tower 14 has both a peak liquid temperature in a reaction temperature distribution ...

METHOD AND APPARATUS FOR RECOVERING ABSORBING AGENTS IN ACID GAS TREATMENT

A method and apparatus for continuously treating acid gases including recovering absorbent chemicals by introducing streams leaving a regenerator and/or leaving an absorber into a static mixing zone wherein supplemental washing water is added to recover absorbent chemicals. Improvements to the prior art methods are provided where one or more absorbent chemical recovery units are included to increase the amount of recovered absorbent chemicals exiting the regenerator and/or exiting the absorber are increased and/or maximized. Absorbent chemical recovery units can include mixing units where liquid is added to the stream of sour gas and absorbent chemical to mix with and absorb the absorbent chemical from the stream.

APPARATUS AND METHOD FOR RECOVERING CARBON DIOXIDE IN COMBUSTION EXHAUST GAS

The present invention relates to a device and method for recovering carbon dioxide (also indicated as CO2 below) contained in combustion exhaust gas, more specifically, a device and method for reactively absorbing CO2 contained in combustion exhaust gas into an amine compound-containing absorption solution, a device and method that allows CO2 contained in the amine compound-containing absorption solution to be released therefrom, a device and method for evaporation separation of impurities contained in the amine compound-containing absorption solution, a device and method for performing a pretreatment such as desulfurization, dust removal and cooling on combustion exhaust gas, and a carbon dioxide recovery device and carbon dioxide recovery method using above devices and methods.

ABSORBING SOLUTION, AND METHOD AND APPARATUS FOR THE REMOVAL OF CO2 OR H2S OR BOTH

An absorbing solution capable of absorbing CO2 or H2S or both contained in a gas, which is obtained by adding a tertiary monoamine preferably in an amount of 1 to 20 wt% to a secondary amine composite absorbent such as a mixture of a secondary monoamine with a secondary diamine. The tertiary monoamine inhibits the secondary amines contained in the solution from deterioration by oxygen contained in a gas or the like to bring about reduction in absorption loss, less lowering in performance and cost reduction. The absorbing solution is suitably usable in apparatus for the removal of CO2 or H2S or both.

METHODS AND SYSTEMS FOR DEACIDIZING GASEOUS MIXTURES

A process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased rate and leads to reduced overall energy costs for the deacidizing operation.

SYSTEM AND METHOD FOR DESORPTION OF ACID GAS FROM AN ABSORPTION LIQUID

The present invention relates to a system for desorption of acid gas (1) from an acid gas rich absorption liquid having a steam part (3) and a process part (4). The steam part (3) and the process part (4) are separated to prevent intermixing of fluids in the steam part with fluids in the process part. The system (1) comprises a desorption cylinder (9) which is adapted to rotate about a longitudinal axis of rotation A of the desorption cylinder (9), and a stationary support stand (19) for supporting the desorption cylinder (9), and means for rotating (18) the desorption cylinder. The steam part (3) and the process part (4) are integrated in the desorption cylinder (9) and steam is supplied to the steam part (3) and acid gas rich absorption liquid (2) is supplied to the process part (4). The process part (4) comprises a desorption chamber (12) provided with a stripper unit (33) having an integrated reboiler (52) and the process part (4) is provided with means for discharging an acid gas lean ...

INNER SURFACE FEATURES FOR CO-CURRENT CONTACTORS

A co-current contactor (202a, 202b, 202c, 202d) for separating components in a fluid stream, the co-current contactor comprising a first inlet configured to receive the fluid stream proximate to a first end (208a, 208b, 208c, 208d) of the co-current contactor, a second inlet configured to receive a solvent proximate the first end of the co-current contactor, and a mass transfer section (222) configured to receive the fluid stream and the solvent and to provide a mixed, two-phase flow, wherein the mass transfer section comprises a surface feature along an inner surface of the mass transfer section configured to reduce film flow along an inner wall of the mass transfer section, and wherein the surface feature comprises at least one of a hydrophobic surface, a superhydrophobic surface, a porous wall surface, and a nonlinear surface irregularity extending radially inward or radially outward along the inner surface of the mass transfer section.

PROCESS WITH CONTINUOUSLY STIRRED TANK REACTOR ABSORBER AND FLASH TANK STRIPPER

The invention relates to a process for separation or purification of gaseous streams by removal of acid gases using a liquid amine solution. The process involves the steps of - contacting the gaseous stream with liquid lean amine solution in at least one continuous flow stirred-tank reactor (10; 10a, 10b; 10c); - removing a sweetened gaseous flow from said continuous flow stirred-tank reactor (10); - removing rich amine from said continuous flow stirred-tank reactor (10; 10a, 10b; 10c) for regeneration; - passing rich amine solution through at least one flash tank stripper 20; 20a, 20b; 20c; - removing acid gases and vapour from said flash tank stripper 20; 20a, 20b; 20c; - removing lean amine from said flash tank stripper for recirculation to said continuous flow stirred-tank reactor (10; 10a, 10b; 10c).

AN AQUEOUS CO2 ABSORBENT COMPRISING 2-AMINO-2-METHYL-1-PROPANOL AND 3-AMINOPROPANOL OR 2-AMINO-2-METHYL-1 -PROPANOL AND 4- AMINOBUTANOL

An aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1 - propanol (AMP) and 3-aminopropanol (AP), or AMP and 4-aminobutanol (AB), is described. A method for capturing CO2 from a CO2 containing gas using the mentioned absorbent, and the use of a combination of AMP and AP, or a combination of AMP and AB are also described.

METHOD OF DRIVING A CO2 COMPRESSOR OF A CO2-CAPTURE SYSTEM USING WASTE HEAT FROM AN INTERNAL COMBUSTION ENGINE

An integrated system and method for driving a CO2 compressor (20) to densify CO2 captured from the exhaust gas stream of an internal combustion engine on board a mobile source of CO2 includes operating a turbine (10) that is operatively connected to the power input or drive shaft of the CO2 compressor, and operatively connecting a motor-generator (30) to the turbine for (a) recovery of any excess power when the turbine-generated power exceeds the CO2 compressor power demand and (b) providing supplemental power when the turbine-generated power is insufficient to meet the CO2 compressor power demand.

AQUEOUS ALKANOLAMINE ABSORBENT COMPOSITION COMPRISING PIPERAZINE FOR ENHANCED REMOVAL OF HYDROGEN SULFIDE FROM GASEOUS MIXTURES AND METHOD FOR USING THE SAME

The present invention relates to an aqueous alkanolamine solution for the removal of hydrogen sulfide from gaseous mixtures containing hydrogen sulfide. The aqueous alkanolamine solution comprises (i) an amino compound with the formula: R1R2NCH2CH(OH)CH2OH wherein R1and R2 independently represent lower alkyl groups of 1 to 3 carbon atoms, (ii) piperazine, and (iii) optionally a physical solvent, wherein said solution does not contain a strong acid. Further, the present invention relates to a process for removing hydrogen sulfide from a gaseous mixture containing hydrogen sulfide, and additionally other acid gases, if present, for example carbon dioxide, comprising the step of contacting the gaseous mixture contain hydrogen sulfide with the aqueous alkanolamine solution, preferably wherein the temperature of the aqueous alkanolamine solution is equal to or greater than 140°F. Examples of the gaseous mixtures include natural gas, synthesis gas, tail gas, and refinery gas.

AMINO ABSORBENT AND METHOD OF CATCHING CARBON DIOXIDE

HIGH-TEMPERATURE METHOD OF SELECTIVE ABSORPTION OF HYDROGEN SULFIDE

METHOD OF IMPROVING PROCESS OF SELECTIVE ABSORPTION OF HYDROGEN SULFIDE

METHOD OF REMOVING MERCAPTANS FROM GASEOUS FLOW

METHOD OF REMOVING MERCAPTANS FROM GAS FLOW

ABSORBENT AND METHOD FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE

ABSORBENT AND METHOD OF SELECTIVE REMOVING HYDROGEN SULFIDE

LOCATED UNDER PRESSURE COLUMN FOR SEPARATION OF GASES AND METHOD OF REGENERATION OF GAS FINAL PROCESSING OF HIGH-PRESSURE

ABSORBENT FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM FLUID MEDIUM FLOW

AQUEOUS SOLUTION CAPABLE OF ABSORBING AND COLLECTING CARBON DIOXIDE IN EXHAUST GAS WITH HIGH EFFICIENCY

황화수소의 선택적 제거를 위한 흡수제

... 본 발명은 유체 스트림으로부터 황화수소의 선택적 제거를 위한 흡수제로서, 하기 a), b) 및 c)를 포함하며, 여기서 b)와 a) 사이의 몰비는 0.05 내지 1.0의 범위인 수용액을 함유하는 흡수제에 관한 것이다: a) 3급 아민; b) 상세한 설명에 언급된 화합물로부터 선택되는 아민계 pH 프로모터; 및 c) 120℃에서 측정되었을 때 수용액의 pH 값이 7.9 내지 8.8 미만이 되도록 하는 양의 6 미만의 pKa 값을 갖는 산. 게다가, 본 발명은 유체 스트림으로부터 산성 가스를 제거하는 방법으로서, 여기서 유체 스트림은 흡수제와 접촉하게 되는 것인 방법에 관한 것이다. 흡수제는 낮은 재생 에너지를 특징으로 한다.

solução aquosa de alcanolamina e processo para remover gases ácidos de uma mistura gasosa

ABSORBING SOLUTION, AND METHOD AND APPARATUS FOR THE REMOVAL OF CO2 OR H2S OR BOTH

An absorbing solution capable of absorbing CO2 or H2S or both contained in a gas, which is obtained by adding a tertiary monoamine preferably in an amount of 1 to 20 wt% to a secondary amine composite absorbent such as a mixture of a secondary monoamine with a secondary diamine. The tertiary monoamine inhibits the secondary amines contained in the solution from deterioration by oxygen contained in a gas or the like to bring about reduction in absorption loss, less lowering in performance and cost reduction. The absorbing solution is suitably usable in apparatus for the removal of CO2 or H2S or both.

METHOD FOR INHIBITING AMINE DEGRADATION DURING CO2 CAPTURE FROM A GAS STREAM

The present application includes a method for inhibiting amine degradation during CO2 capture from flue gas streams. Particularly, the present disclosure relates to a method of inhibiting O2- and/or SO2-induced degradation of amines using sodium sulfite (Na2SO3), potassium sodium tartrate tetrahydrate (KNaC4H4O6•4H2O), ethylenediaminetetraacetic acid (EDTA) or hydroxylamine (NH2OH), or analogs or mixtures thereof during CO2 capture by amines.

Methods and systems for improving the energy efficiency of carbon dioxide capture

A system for carbon dioxide capture from a gas mixture comprises a lean solvent comprising 3-amino-1-propanol (AP), 2-dimethylamino-2-methyl-1-propanol (DMAMP), and water; an absorber containing at least a portion of the lean solvent, wherein the absorber is configured to receive the lean solvent and a gaseous stream comprising carbon dioxide, contact the lean solvent with the gaseous stream, and produce a rich solvent stream and a gaseous stream depleted in carbon dioxide; a stripper, wherein the stripper is configured to receive the rich solvent stream; a cross-exchanger fluidly coupled to a rich solvent outlet on the absorber and a rich solvent inlet on the stripper; a reboiler fluidly coupled to a lower portion of the stripper; and a condenser fluidly coupled to a vapor outlet of the stripper.

Acidic gas absorbent, acidic gas removal method and acidic gas removal apparatus

The embodiments provide an acidic gas absorbent, an acidic gas removal method, and an acidic gas removal apparatus. The absorbent absorbs an acidic gas in a large amount and hardly diffuses in air. The acidic gas absorbent according to the embodiment comprises an amine compound having a sulfonyl group and two or more amino groups.

ДЕЗОДОРИРУЮЩАЯ СЕРООЧИСТКА ПРИРОДНОГО ГАЗА ПОСРЕДСТВОМ МЕМБРАННОГО КОНТАКТНОГО АППАРАТА

Изобретение относится к способу очистки природного газа. Способ дезодорирующей сероочистки природного газа до технических условий на сжиженный природный газ включает введение природного газа во внутренний канал мембранного контактного аппарата, введение абсорбционного растворителя в межтрубное пространство мембранного контактного аппарата и удаление диоксида углерода и сероводорода с абсорбционным растворителем из природного газа, приводя в результате к подвергнутому сероочистке природному газу, содержащему менее чем 50 объемных частей на миллион диоксида углерода и менее чем 4 объемные части на миллион сероводорода. Изобретение обеспечивает усовершенствованный способ очистки природного газа, в том числе сведение к минимуму последствий вызванных движением и нестабильностью процесса, например при обработке в море. 2 н. и 18 з.п. ф-лы, 4 ил., 5 табл., 22 пр.

Способ и колонна абсорбционной очистки газов от нежелательных примесей

СПОСОБ АМИННОЙ ОБРАБОТКИ ДЛЯ ОТДЕЛЕНИЯ КИСЛОГО ГАЗА С ИСПОЛЬЗОВАНИЕМ СМЕСЕЙ АМИНОВ И АЛКИЛОКСИАМИНОВ

... 1. Способ абсорбции HS и COиз газовой смеси, содержащей оба этих газа, включающий контактирование газовой смеси с сочетанием абсорбентов, состоящим из (1) первичного абсорбирующего компонента, который содержит стерически затрудненный (третичный алкиловый) аминоэфир, который является продуктом реакции алкокси триэтиленгликолевого спирта и стерически затрудненного амина формулы RRNH, где Rявляется С-Салкилом, Rявляется H или C-Салкилом и (2) вторичного абсорбирующего компонента, который содержит метилдиэтаноламин (МДЭА), моноэтаноламин (МЭА), метиламиноэтанол (МАЭ), этоксиэтаноламин (ЭЭА) 2-амино-2-метил-1-пропанол (АМП), пиперазин (ПЗ), диэтаноламин (ДЭА), триэтаноламин (ТЭА), дигликольамин (аминоэтоксиэтанол, ДГА) или диизопропиламин (ДИПА).2. Способ по п. 1, в котором Rявляется С-Салкилом с разветвленной цепью.3. Способ по п. 1, в котором стерически затрудненный амин является третбутиламином.4. Способ по п. 1, в котором алкокси триэтиленгликоль является метокситриэтиленгликолем.5. Способ ...

Method and apparatus for recovering absorbing agents in acid gas treatment

A method and apparatus for continuously treating acid gases including recovering absorbent chemicals by introducing streams leaving a regenerator and/or leaving an absorber into a static mixing zone wherein supplemental washing water is added to recover absorbent chemicals. Improvements to the prior art methods are provided where one or more absorbent chemical recovery units are included to increase the amount of recovered absorbent chemicals exiting the regenerator and/or exiting the absorber are increased and/or maximized. Absorbent chemical recovery units can include mixing units where liquid is added to the stream of sour gas and absorbent chemical to mix with and absorb the absorbent chemical from the stream.

Hydrocarbon separation process

CO2 recovery device and CO2 recovery method

The present invention includes: a CO ...

Method and absorbent composition for recovering a gaseous component from a gas stream

A method and apparatus for recovering a gaseous component from an incoming gas stream is described. The incoming gas stream is contacted with a lean aqueous absorbing medium to absorb at least a portion of the gaseous component from the incoming gas stream to form a lean treated gas stream and a rich aqueous absorbing medium. At least a portion of the gaseous component is desorbed from the rich aqueous absorbing medium at a temperature to form an overhead gas stream and a regenerated aqueous absorbing medium. At least a portion of the overhead gas stream is treated to recover a condensate stream. At least a portion of the condensate stream is used to form a heated stream. At least a portion of the heated stream is recycled back to the desorbing step. Novel absorbing medium compositions to recover carbon dioxide and/or hydrogen sulfide are also described.

Process for CO2 capture using micro-particles comprising biocatalysts

A process for capturing CO includes contacting a C0-containing gas with an absorption mixture optionally within a packed reactor. The absorption mixture includes a liquid solution and micro-particles. The micro-particles include a support material and biocatalyst supported by the support material and are sized and provided in a concentration such that the absorption mixture flows through the packed reactor and that the micro-particles are carried with the liquid solution to promote dissolution and transformation of CO into bicarbonate and hydrogen ions. The absorption mixture and micro-particles may be provided in an absorption reactor so as to be pumpable. Furthermore, a process for desorbing CO gas from an ion-rich aqueous mixture includes providing biocatalytic micro-particles and feeding the mixture to a desorption reactor, to promote transformation of the bicarbonate and hydrogen ions into CO gas and water.

Catalytic method and apparatus for separating a gaseous component from an incoming gas stream

A process for separating at least a portion of an acid gas from a gaseous mixture, said process comprising contacting the gaseous mixture with an absorption medium and/or adsorption medium, wherein said medium absorbs and/or adsorbs at least a portion of the acid gas to form a rich medium; and separating at least a portion of the acid gas from the rich medium to form a lean medium; wherein the separation step is performed in the presence of an acid catalyst.

CO2 recovery system and CO2 absorption liquid

Chemical compounds for the removal of carbon dioxide from gases

A method and apparatus for utilizing an amine-based absorption compound for flue gas, or combustion gas, CO2 capture, according to embodiments of the present invention. In some embodiments, C02 is delivered from a wet, or dry, flue gas scrubber to an absorber. The amine-based absorption compound is introduced in an aqueous solution to the absorber, which is located downstream of the wet, or dry, flue gas scrubber. In some embodiments, the C02-laden amine-based absorption compound is then subjected to a regeneration step to regenerate the C02-laden amine-based absorption compound and strip out absorbed C02. In some embodiments, energy is supplied to a stripper through a reboiler to accomplish the regeneration step.

Composite amine absorbing solution, and device and method for removing CO2 or H2S or both

The composite amine-absorbing solution according to the present invention absorbs CO ...

Apparatus and system for enhanced selective contaminant removal processes related thereto

Systems and methods for separating CO ...

PORTABLE CARBON DIOXIDE ABSORPTION SYSTEM

Various embodiments of a portable carbon dioxide (C02) absorption device that may remove excess C02 from a closed environment are disclosed herein. The absorption device is reusable and configured for many environments. WO 2018/236423 1/27 PCT/US2018/016966 005 -00 ...

Gas separation apparatus and packing

Provided is a gas separation device which suppresses an increase in pressure loss, and can be used to achieve reduced size, weight and costs. The gas separation device causes absorbent to flow down along the surface of a filler arranged in a treatment tank, and supplies, to the treatment tank, gas which is to be treated and which contains target gas components, and causes the gas which is to be treated and the absorbent flowing down along the surface of the filler to come into gas-liquid contact, thus the target gas components contained in the gas which is to be treated are absorbed into the absorbent and are separated or collected from the gas which is to be treated. The filler has at least one filler unit formed by a plurality of expanded metal plates, standing vertically and arranged in parallel.

Aqueous alkanolamine absorbent composition comprising piperazine for enhanced removal of hydrogen sulfide from gaseous mixtures and method for using the same

The present invention relates to an aqueous alkanolamine solution for the removal of hydrogen sulfide from gaseous mixtures containing hydrogen sulfide. The aqueous alkanolamine solution comprises (i) an amino compound with the formula: R ...

ABSORBING SOLUTION THAT REMOVES ANY ONE OF CO2 AND H2S OR BOTH, AND METHOD AND APPARATUS THAT USES THE ABSORBING SOLUTION

An absorbing-solution that absorbs at least one of CO2 and H2S that are present in a gas. The absorbing-solution includes a secondary-amine composite absorbent and a tertiary monoamine. The tertiary monoamine is added to the secondary-amine composite absorbent.

PROCESS FOR REMOVAL OF ACID GASES FROM A FLUID STREAM

In a process for removal of acid gases from a fluid stream the fluid stream is contacted with an absorbent to obtain a treated fluid stream and a laden absorbent. The absorbent comprises a diluent and a compound of the general formula (I) wherein R1 is C1-C3-alkyl; R2 is C1-C3-alkyl; R3 is selected from hydrogen and C1-C3-alkyl; and R4 is selected from hydrogen and C1-C3-alkyl ...

ABSORBENT AND PROCESS FOR SELECTIVELY REMOVING HYDROGEN SULFIDE

An absorbent for the selective removal of hydrogen sulfide over carbon dioxide from a fluid stream, wherein the absorbent contains an aqueous solution, comprising an amine of formula (I) and/or an amine of formula (II) wherein U-V-W is CH-O-CHR5, N-CO-CHR5 or N-CO-NR5; U'-V'-W is C-O-CR5; R1 is independently C1-C5-alkyl; R2 is selected from hydrogen and C1-C5-alkyl; R3 is independently selected from hydrogen and C1-C5-alkyl; R4 is independently selected from hydrogen and C1-C5-alkyl; R5 is selected from hydrogen, C1-C5-alkyl, (C1-C5- alkoxy)-C1-C5-alkyl, and hydroxy-C1-C5-alkyl; and x is an integer from 1 to 10. The absorbent has a reduced tendency for phase separation at temperatures falling within the usual range of regeneration temperatures for the aqueous amine mixtures and a low volatility in aqueous solvents.

AN AQUEOUS ALKANOLAMINE COMPOSITION AND PROCESS FOR THE SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM GASEOUS MIXTURES

The present invention relates to an aqueous alkanolamine solution and use therein a process for the selective removal of hydrogen sulfide from gaseous mixtures comprising hydrogen sulfide. The aqueous alkanolamine solution consists of - an amino compound with the formula: R1R2NCH2CH(OH)CH2OH wherein R1 and R2 independently represent methyl, ethyl, propyl or isopropyl groups - and bis(2-hydroxyethyl)methylamine, - optionally one or more of a physical solvent, an antifoaming agent, an antioxidant, a corrosion inhibitor, a film former, a chelating agent or a pH adjuster and - water The process for selectively removing hydrogen sulfide, comprising the step of contacting the gaseous mixture with the aqueous alkanolamine solution, preferably wherein the temperature of the aqueous alkanolamine solution is equal to or greater than 140°F.

CO2 RECOVERY SYSTEM AND CO2 ABSORPTION LIQUID

In an embodiment, a CO2 recovery system has an absorber, a regenerator, and a circulation device. An absorption liquid has an aqueous solution of amine having an alcohol group, and dimethyl silicone oil in which a part of methyl groups is substituted by at least one type selected from an aminoalkyl group, a carboxyl group, and a hydroxyl-containing alkyl group. The absorber contacts a combustion exhaust gas of a fossil fuel and the absorption liquid to absorb CO2, which is contained in the combustion exhaust gas, into the absorption liquid. The regenerator releases CO2 by applying thermal energy to the CO2-absorbed absorption liquid. A circulation device circulates the absorption liquid between the absorber and the regenerator.

ETHYLENE SEPARATION

A polyethylene production process, comprising contacting ethylene and a polymerization catalyst under suitable reaction conditions to yield a polymerization product stream, separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein at least a portion of the ethylene from the light gas stream is absorbed by the absorption solvent system, removing unabsorbed gases of the light gas stream from contact with the absorption solvent system to form a waste gas stream, and recovering ethylene from the absorption solvent system.

CARBON DIOXIDE-ABSORBING SOLUTION AND METHOD OF RECOVERING CARBON DIOXIDE

In a preferred embodiment, there is provided a method of recovering carbon dioxide, including bringing a CO2-containing gas into contact with a CO2-absorbing solution in an absorption column; circulating the CO2-rich solution in a regeneration column and recirculating the absorbing solution inside the absorption column; and performing heat exchange between the CO2-poor solution and the CO2-rich solution, wherein an alkanolamine aqueous solution containing a silicone oil and/or organosulfur compound represented by the Formula (A) or (B) is added to the solution to adjust the absorbing solution so as to include from 30% to 60% by weight of the alkanolamine, from 0.01% to 2% by weight of the organosulfur compound and from 5 ppm to 100 ppm by weight of the silicone oil.

METHOD AND DEVICE FOR THE ABSORPTIVE REMOVAL OF CARBON DIOXIDE FROM BIOGAS

The invention relates to a method for the absorptive removal of carbon dioxide from biogas using a scrubbing liquid in which carbon dioxide is chemically bound and a device suitable for carrying out the method. Proceeding from the disadvantages of the known prior art, a method is to be provided with which the loss of methane is decreased. For this purpose, as a solution it is proposed that the loaded scrubbing liquid occurring after the absorption is heated to a temperature at which liberation of CO2 begins. Immediately thereafter, the loaded scrubbing liquid is fed to at least one centrifugal separator (11) for separating off the gas phase from the liquid phase, wherein methane and dissolved fractions of CO2 escape via the gas phase. After separation is complete, the gas phase is passed into the absorber unit (1) and the liquid phase is further heated to the temperature required for desorption and fed to the desorption unit (16) for regeneration.

AUXILIARY ACID AND SOUR GAS TREATMENT SYSTEM AND METHOD

An auxiliary sour gas treatment system for treating a stream of sour gas during a time wherein a primary gas treatment facility is unavailable, malfunctioning, inadequate or inoperable. The auxiliary sour gas treatment system comprises a lean solvent storage system to store an appreciable volume of a regenerable lean solvent available on demand. A scrubber to treat an influent supply of the sour gas by contacting the sour gas and the lean solvent which chemically or physically binds the contaminants in the sour gas resulting in a cleaned gas suitable for disposal or use as a fuel, and the solvent in an enriched state that contains the removed contaminants. The enriched solvent resulting from treatment may be stored indefinitely in a rich solvent storage system and then regenerated at any convenient time and at any convenient rate or place to remove the contaminants from the rich solvent.

METHOD OF DRIVING A CO2 COMPRESSOR OF A CO2-CAPTURE SYSTEM USING WASTE HEAT FROM AN INTERNAL COMBUSTION ENGINE

An integrated system and method for driving a CO2 compressor (20) to densify CO2 captured from the exhaust gas stream of an internal combustion engine on board a mobile source of CO2 includes operating a turbine (10) that is operatively connected to the power input or drive shaft of the CO2 compressor, and operatively connecting a motor-generator (30) to the turbine for (a) recovery of any excess power when the turbine-generated power exceeds the CO2 compressor power demand and (b) providing supplemental power when the turbine-generated power is insufficient to meet the CO2 compressor power demand.

A PROCESS FOR THE HIGH TEMPERATURE SELECTIVE ABSORPTION OF HYDROGEN SULFIDE

A high temperature selective absorption process for treating a gas stream having concentrations of both hydrogen sulfide and carbon dioxide to yield a treated gas stream having a reduced hydrogen sulfide concentration. The high temperature selective absorption process uniquely utilizes a novel absorbent composition which enables the processing of the gas stream under difficult absorption conditions and provides for other features of the inventive absorption process.

AN AMINE ABSORBENT AND METHOD FOR CO2 CAPTURE

A liquid, aqueous CO2 absorbent comprising two or more amine compounds, where the aqueous solution of amines having absorbed CO2 is not, or only partly miscible with an aqueous solution of amines not having absorbed CO2, where at least one of the amines is a tertiary amine, and where at least one of the amines is a primary and/or a secondary amine, wherein the tertiary amine is DEEA and the primary and/or secondary amine(s) is (are) selected from DAB, DAP, DiAP, DMPDA, HEP, or the tertiary amine is DIPAE, or N-TBDEA and primary and/or secondary amine(s) is (are) selected from DAB, DAP, DiAP, DMPDA, HEP, MAPA, and MEA, and a method for CO2 capture using the CO2 absorbent, are described.

ABSORBENT FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM A FLUID STREAM

METHOD FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM GAS MIXTURES AND APPLICATION TIOALKANOLA FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE

METHOD OF REMOVING MERCAPTANS FROM GASEOUS FLOW

REMOVAL OF HYDROGEN SULFIDE AND CARBON DIOXIDE FROM FLUID MEDIUM FLOW

COMPOSITION ABSORBENT FOR SELECTIVE ABSORPTION OF HYDROGEN SULFIDE AND A METHOD FOR THE USE THEREOF

Acid gas absorbent, acid gas removal method, and acid gas removal device

Chemical compounds for the removal of carbon dioxide from gases

A method and apparatus for utilizing an amine-based absorption compound for flue gas, or combustion gas, CO2 capture, according to embodiments of the present invention. In some embodiments, CO2 is delivered from a wet, or dry, flue gas scrubber to an absorber. The amine-based absorption compound is introduced in an aqueous solution to the absorber, which is located downstream of the wet, or dry, flue gas scrubber. In some embodiments, the CO2-laden amine-based absorption compound is then subjected to a regeneration step to regenerate the CO2-laden amine-based absorption compound and strip out absorbed CO2. In some embodiments, energy is supplied to a stripper through a reboiler to accomplish the regeneration step.

métodos, produtos e usos relacionados aos mesmos

Apparatus for absorbing a component from a gas mixture

INTEGRATED GAS TURBINE, SAGD BOILER AND CARBON CAPTURE

An integrated power generation system for reducing carbon dioxide emissions is provided. The integrated system comprises a gas turbine having an air inlet, a fuel inlet and an exhaust gas outlet; a steam-assisted gravity drainage (SAGD) boiler having an inlet connected to the exhaust gas outlet of the gas turbine, a fuel inlet, an optional air inlet, and a flue gas outlet; and a carbon dioxide capture system connected to the flue gas outlet of the SAGD boiler. A method for capturing the carbon dioxide exhausted from a gas turbine and a SAGD boiler is also provided.

3-COMPONENT ABSORBENT SOLUTION, AND CO2 AND/OR H2S REMOVAL DEVICE AND METHOD

... 1) a first amine, said amine being a straight-chain secondary monoamine, 2) a second amine, said amine being a cyclic secondary polyamine serving as a reaction accelerator, and 3) a third amine consisting of one type selected from a secondary or tertiary cyclic amine group and a straight-chain amine group with a high steric hinderance are combined to obtain an absorbent solution which, by way of the synergistic effect of these components, exhibits excellent absorption of CO2 and/or H2S and excellent dissipation of the CO2 and/or H2S absorbed when recycling the absorbent solution, and can be used to reduce the amount of water vapour used in CO2 capturing equipment when recycling the absorbent solution.

METHOD FOR IMPROVING TOTAL ENERGY DEMAND IN A POST-COMBUSTION CARBON CAPTURE PROCESS WITH IONIC ABSORBENT

Disclosed herein is a method for improving the total energy demand required to separate carbon dioxide (CO2) from an aqueous ionic absorbent solution in a post-combustion carbon capture process. The method involves (a) contacting a flue gas stream containing CO2 with an aqueous ionic absorbent solution under absorption conditions to absorb at least a portion of the CO2 from the flue gas stream and form a CO2-aqueous ionic absorbent solution stream, wherein the aqueous ionic absorbent solution comprises one or more diluents and an ionic absorbent containing a cation and an anion comprising an amine moiety; and (b) subjecting at least a portion of the CO2-aqueous ionic absorbent solution stream to desorption conditions to form a CO2-rich stream and an aqueous ionic absorbent solution stream having a reduced CO2 content.

Absorbent solution containing a mixture of 1,2-bis-(2-dimethylaminoethoxy)-ethane and of 2-[2-(2-dimethylaminoethoxy)-ethoxy]-ethanol, and method of removing acid compounds from a gaseous effluent

Methods for deacidizing gaseous mixtures by phase enhanced absorption

An improved process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased rate and leads to reduced overall energy costs for the deacidizing operation.

METHOD OF IMPROVING A PROCESS FOR THE SELECTIVE ABSORPTION OF HYDROGEN SULFIDE

An absorbent composition that is useful in the selective removal of hydrogen sulfide relative to carbon dioxide from gaseous mixtures that comprise both hydrogen sulfide and carbon dioxide and the use thereof. The absorbent composition includes an amine mixture of an amination reaction product of tert-butylamine with a polydispersed polyethylene glycol (PEG) mixture having an average molecular weight within a certain specified range of molecular weights. The amination reaction product may also comprise a first sterically hindered amine and a second sterically hindered amine. The absorbent composition, preferably, includes an organic co-solvent, such as a sulfone compound. A method is also provided for improving the operation of certain gas absorption processes by utilizing the absorbent composition.

METHOD FOR IMPROVING TOTAL ENERGY DEMAND IN A POST-COMBUSTION CARBON CAPTURE PROCESS WITH IONIC ABSORBENT

Disclosed herein is a method for improving the total energy demand required to separate carbon dioxide (CO2) from an aqueous ionic absorbent solution in a post-combustion carbon capture process. The method involves (a) contacting a flue gas stream containing CO2 with an aqueous ionic absorbent solution under absorption conditions to absorb at least a portion of the CO2 from the flue gas stream and form a CO2-aqueous ionic absorbent solution stream, wherein the aqueous ionic absorbent solution comprises one or more diluents and an ionic absorbent containing a cation and an anion comprising an amine moiety; and (b) subjecting at least a portion of the CO2-aqueous ionic absorbent solution stream to desorption conditions to form a CO2-rich stream and an aqueous ionic absorbent solution stream having a reduced CO2 content.

Amine-based washing solution for absorbing carbon dioxide comprising oxidation inhibitors

Es wird ein Verfahren zur Abscheidung von Kohlendioxid aus einem Rauchgas (RG) einer Verbrennungsanlage angegeben, wobei einer Waschlösung (A) mit einem aminhaltigen Absorptionsmittel (z.B. 20) als Oxidationsinhibitor Bicin (31) und/oder EDTA (30) zugemischt wird, das Rauchgas (RG) mit der derart aufbereiteten Waschlösung (A) unter Absorption von enthaltenem Kohlendioxid in Kontakt gebracht wird, und wobei anschließend die Waschlösung (A) unter Desorption des Kohlendioxids thermisch behandelt wird. Weiter wird eine entsprechende Waschlösung (A) mit einem aminhaltigen Absorptionsmittel (z.B. 20) sowie mit Bicin (31) und/oder EDTA (30) als Oxidationsinhibitor angegeben.

ＣＯ２回収システムおよびＣＯ２吸収液

САМОКОНЦЕНТРИРУЮЩИЙСЯ АБСОРБЕНТ ДЛЯ ОТДЕЛЕНИЯ КИСЛОТНОГО ГАЗА

Изобретение относится к способу нейтрализации кислотности газовой смеси с использованием самоконцентрирующегося абсорбента. Способ и система нейтрализации кислотности газовой смеси, содержащей кислотный газ, включают: введение газовой смеси в контакт с абсорбентом в абсорбционной установке, осуществление абсорбции кислотного газа абсорбентом для получения фазы концентрированного амина, отделение фазы концентрированного амина от остальной части абсорбента; подачу остальной части абсорбента обратно в абсорбционную установку; подачу фазы концентрированного амина в регенерационную установку и подачу регенерированного концентрированного амина обратно в абсорбционную установку. Технический результат заключается в увеличении скорости абсорбции кислотного газа из газовой смеси. 5 н. и 17 з.п. ф-лы, 2 ил.

ЖИДКИЙ АБСОРБЕНТ ДЛЯ СО2 И/ИЛИ Н2S. А ТАКЖЕ УСТРОЙСТВО И СПОСОБ С ЕГО ИСПОЛЬЗОВАНИЕМ

Настоящее изобретение относится к жидкому абсорбенту для COи/или HS, а также устройству и способу с его использованием. Предложен жидкий абсорбент, который абсорбирует COи/или HS, содержащиеся в газе. Абсорбент содержит следующие компоненты: (a) вторичный линейный моноамин; (b1) третичный линейный моноамин или (b2) стерически затруднённый первичный моноамин; и (c) вторичный циклический диамин, в котором концентрация каждого из указанных компонентов составляет менее 30 мас.%. Изобретение обеспечивает уменьшение количества тепла, подаваемого в ребойлер при осуществлении регенерации жидкого абсорбента. 3 н. и 6 з.п. ф-лы, 5 ил., 2 табл.

Component Separations in Polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Sorbent regeneration in a heated hollow-fiber assembly

Methods and apparatus relate to recovery of carbon dioxide and/or hydrogen sulfide from a gas mixture. Separating of the carbon dioxide, for example, from the gas mixture utilizes a liquid sorbent for the carbon dioxide. The liquid sorbent contacts the gas mixture for transfer of the carbon dioxide from the gas mixture to the liquid sorbent. The carbon dioxide then desorbs from the liquid sorbent using hollow-fiber contactors as a source of heat to liberate the carbon dioxide further separated by the hollow-fiber contactors from the liquid sorbent.

Acid gas absorbent, acid gas removal method, and acid gas removal device

There is provided an acid gas absorbent having excellent performance of absorbing acid gas such as carbon dioxide, and an acid gas removal device and an acid gas removal method using the acid gas absorbent. An acid gas absorbent of an embodiment contains at least one type of tertiary amine compound represented by the following general formula (1). (In the above formula (1), the cycle A represents acyclic structure whose carbon number is not less than 3 nor more than 8. R 1 , R 2 and R 3 each represent an alkyl group whose carbon number is 1 to 4, and R 4 represents a hydroxyalkyl group. R 1 and R 2 are groups coupled to carbon atoms adjacent to a carbon atom forming the cycle A and coupled to a nitrogen atom.)

Method and device for the absorptive removal of carbon dioxide from biogas

The absorptive removal of carbon dioxide from biogas using a scrubbing liquid in which carbon dioxide is chemically bound proceeds by heating the loaded scrubbing liquid, occurring after the absorption, to a temperature at which liberation of CO 2 begins. Immediately thereafter, the loaded scrubbing liquid is fed to at least one centrifugal separator for separating off the gas phase from the liquid phase, wherein methane and dissolved fractions of CO 2 escape via the gas phase. After separation is complete, the gas phase is passed into the absorber unit and the liquid phase is further heated to the temperature required for desorption and fed to the desorption unit for regeneration.

CO2 RECOVERY DEVICE AND CO2 RECOVERY METHOD

The present invention includes: a COabsorption part including a first absorption section A for absorbing COfrom exhaust gas and a second absorption section B that is located below the first absorption section A, arranged vertically within a COabsorption tower for absorbing COfrom exhaust gas B containing CO; and a first absorption liquid extraction line Lthat is provided between the first absorption section A and the second absorption section B, and that is for extracting, from the absorption tower a COabsorption liquid that has absorbed COin the exhaust gas at the first absorption section A, and for resupplying the COabsorption liquid after being cooled to the second absorption section B within the absorption tower wherein an extraction position X of the first absorption liquid extraction line Lfor extracting the COabsorption liquid from the absorption tower has both a peak liquid temperature in a reaction temperature distribution for the COabsorption liquid inside the first absorption section A, and a peak liquid temperature in a reaction temperature distribution for the COabsorption liquid inside the second absorption section B. 1. A COrecovery device having an absorption column which causes a gas containing COand a COabsorption liquid to come into countercurrent contact with each other to absorb COfrom the gas , the device comprising:{'sub': 2', '2, 'a COabsorption section which includes a first absorption section absorbing COfrom the gas and a second absorption section positioned below the first absorption section, the first absorption section and the second absorption section being disposed in the absorption column in a height direction of the absorption column; and'}{'sub': 2', '2', '2, 'a first absorption liquid extraction line which is provided between the first absorption section and the second absorption section, and through which a COabsorption liquid absorbing COcontained in the gas in the first absorption section is extracted from the absorption column ...

Aqueous solution which efficiently absorbs and recovers carbon dioxide in exhaust gas, and method for recovering carbon dioxide using same

Disclosed is an aqueous solution for absorbing and recovering carbon dioxide from a carbon dioxide-containing gas, the aqueous solution containing an amino alcohol compound represented by Formula I and an amine compound represented by Formula 2, wherein R represents an alkyl group having 1 to 5 carbon atoms; and n represents 1 or 2, wherein X represents —NR1R2; Y represents —NR3R4; R1, R2, R3 and R4 may be the same or different, and each represents an alkyl group having 1 to 3 carbon atoms; and m represents an integer of 3 to 7.

CARBON DIOXIDE RECOVERY

Carbon dioxide is separated from flue gas by scrubbing the gas with an aqueous solution of ammonia and salt, and the COis therefore released from the solution by heating. 1. (canceled)2. (canceled)3. (canceled)4. A process for recovering carbon dioxide from a flue gas containing carbon dioxide comprising the steps of:a. scrubbing the flue gas with an aqueous solution of ammonia and salt in a first column at atmospheric pressure and in a temperature range of about 15° C. to 50° C. to absorb the carbon dioxide into the aqueous solution;b. heating the saturated solution in a second column to release the absorbed carbon dioxide therefrom; andc. recycling the solution after release of the carbon dioxide for reuse in step a.5. A process for recovering carbon dioxide from a flue gas containing carbon dioxide comprising the steps of:a. scrubbing the flue gas with an aqueous solution of n-propylamine and salt in a first column at atmospheric pressure and in a temperature range of about 15° C. to 50° C. to absorb carbon dioxide into the aqueous solution;b. heating the saturated solution in a second column to release the absorbed carbon dioxide therefrom; andc. recycling the solution after released of the carbon dioxide for reuse in the step a.6. A process for recovering carbon dioxide from a flue gas containing carbon dioxide comprising the steps of:a. scrubbing the flue gas with an aqueous solution of ammonia and potassium chloride in a first column at atmospheric pressure and in a temperature range of about 15° C. to 50° C. to absorb carbon dioxide from the flue gas into the solution;b. heating the saturated solution in the second column to release the carbon dioxide therefrom; andc. recycling the solution after release of the carbon dioxide for reuse in the step a. The present invention relates to a process for the recovery of carbon dioxde from flue gases. The process uses an aqueous solution of salt and an amine to scrub the flue gas and absorb carbon dioxide. The ...

FOULING MITIGATION IN ALKANOLAMINE TREATING SYSTEMS

Methods for the prevention or mitigation of fouling in amine-treating systems comprising providing circulating aqueous amine solution and a hydrocarbon stream comprising at least one acid gas; and interacting the circulating aqueous amine solution with the hydrocarbon stream comprising the at least one acid gas to remove the acid gas from the hydrocarbon stream and entrain the acid gas into the aqueous amine solution. The circulating aqueous amine solution comprises entrained acid gas comprises foulant precursors; and polysulfide ions are introduced to react with the foulant precursors to decrease the rate of fouling within the circulating aqueous amine solution. 1. A method for the prevention or mitigation of fouling in amine-treating systems comprising:providing circulating aqueous amine solution and a hydrocarbon stream comprising at least one acid gas; and 'wherein the circulating aqueous amine solution comprising entrained acid gas comprises foulant precursors; and', 'interacting the circulating aqueous amine solution with the hydrocarbon stream comprising the at least one acid gas to remove at least a portion of the acid gas from the hydrocarbon stream and entrain the acid gas into the aqueous amine solution;'}introducing polysulfide ions react with the foulant precursors to decrease the rate of fouling within the circulating aqueous amine solution.2. The method of wherein the circulating aqueous amine solution comprises a rich amine circuit and a lean amine circuit; and wherein polysulfide ions are introduced into the rich amine circuit claim 1 , the lean amine circuit claim 1 , or both the rich amine circuit and the lean amine circuit.3. The method of claim 1 , wherein the aqueous amine solution comprises alkanolamines.4. The method of claim 3 , wherein the alkanolamines comprise at least one ethanolamine selected from the group consisting of monoethanolamine (MEA) claim 3 , diethanolamine (DEA) claim 3 , diglycolamine (DGA) claim 3 , di-isopropanolamine ...

GAS TREATMENT METHOD AND GAS TREATMENT APPARATUS

A gas treatment method includes an absorption step in which a gas to be treated containing an acidic compound, such as carbon dioxide, is brought into contact, in an absorber, with a treatment liquid that absorbs the acidic compound; and a regeneration step in which the treatment liquid, having the acidic compound absorbed therein, is sent to a regenerator, and the treatment liquid is then heated to separate the acidic compound from the treatment liquid. In the regeneration step, a gas almost insoluble to the treatment liquid, such as hydrogen gas, is brought into contact with the treatment liquid. 1. A gas treatment method , the method comprising:bringing a gas comprising an acidic compound into contact, with a first treatment liquid in an absorber, thereby forming a second treatment liquid having an acidic compound absorbed therein; andregenerating the acid compound by sending the second treatment liquid to a regenerator, and heating the second treatment liquid to separate the acidic compound from the second treatment liquid,wherein the regenerating comprises feeding a gas almost insoluble to the second treatment liquid to the regenerator, and bringing the gas almost insoluble to the second treatment liquid into contact with the second treatment liquid.2. The gas treatment method according to claim 1 , further comprising:for transferring reaction heat, generated in the absorber, to the regenerator with heat transfer means.3. The gas treatment method according to claim 1 , wherein the absorber and the regenerator exchange heat directly.4. The gas treatment method according to claim 1 , wherein a difference of a temperature of the absorber from a temperature of the regenerator falls in a range from −20° C. to 30° C.5. The gas treatment method according to claim 1 , wherein the regenerating comprises feeding 0.05 liters or more of the gas claim 1 , per 1 g of the second treatment liquid to the regenerator.6. The gas treatment method according to claim 1 , wherein the ...

AQUEOUS ABSORBENT COMPOSITION FOR ENHANCED REMOVAL OF HYDROGEN SULFIDE FROM GASEOUS MIXTURES AND METHOD FOR USING THE SAME

The present invention relates to an aqueous alkanolamine solution for the removal of hydrogen sulfide from gaseous mixtures containing hydrogen sulfide. The aqueous alkanolamine solution comprises (i) an amino compound with the formula: 18-. (canceled)9. A process for removing hydrogen sulfide from a gaseous mixture comprising hydrogen sulfide comprising the step of: (i) 3-(dimethylamino)-1,2-propanediol,', '(ii) piperazine,', 'and', '(iii) optionally a physical solvent', 'wherein said aqueous alkanolamine solution does not contain an acid having a pKa of 8 or less or an acid-forming material capable of forming in aqueous medium an acid having a pKa of 8 or less., 'A) contacting the gaseous mixture with an aqueous alkanolamine solution wherein the aqueous alkanolamine solution consists of101. The process of claim wherein(i) the 3-(dimethylamino)-1,2-propanediol is present in an amount from 0.1 to 75 weight percent,and(ii) the piperazine is present in an amount from 0.1 to 15 weight percent,wherein weight percent is based on the total weight of the aqueous alkanolamine solution.111. The process of claim wherein the physical solvent is present in an amount from 1 to 75 weight percent based on the total weight of the aqueous alkanolamine solution.123. The process of claim wherein the physical solvent (iii) is selected from cyclotetramethylenesulfone , dimethyl ethers of polyethylene glycol , 1 ,3-dimethyl-3 ,4 ,5 ,6-tetrahydro-2(1H)-pyrimidinone , N-formylmorpholine , N-acetylmorpholine , triethylene glycol monomethyl ether , or mixtures thereof.131. The process of claim further comprising the step ofB) steam stripping the aqueous alkanolamine solution such that an acid gas-lean aqueous alkanolamine solution is formed which may be used in said contacting step.141. The process of claim wherein the temperature of the aqueous alkanolamine solution is equal to or greater than 140° F. The present invention relates to a composition comprising an aqueous solution of ...

PORTABLE CARBON DIOXIDE ABSORPTION SYSTEM

Various embodiments of a portable carbon dioxide (CO2) absorption system for reducing excess CO2 from a target environment are disclosed herein. The absorption system includes a carbon dioxide absorption machine defining a housing, a blower, a manifold system, and a carbon dioxide absorbing device. The carbon dioxide absorption machine may be configured for different applications including medical applications, industrial applications, semiconductor manufacturing applications, and applications associated with the general transportation and cargo of carbon dioxide. 1. A portable carbon dioxide absorption system , comprising: a housing;', 'a manifold system in fluid communication with the housing;', 'a blower disposed within the housing and in fluid communication with the manifold system, the blower configured to draw air in and out of the housing; and', 'a carbon dioxide absorbing device disposed within the housing, the carbon dioxide absorbing device in fluid communication with the manifold system, wherein the carbon dioxide absorbing device absorbs carbon dioxide from the air drawn to within the housing., 'a carbon dioxide absorption machine, including2. The system of claim 1 , further comprising:a manifold housing defined within the manifold system, the manifold housing defining an expansion chamber disposed within the housing, wherein the expansion chamber filters and reduces a velocity of air passing through the manifold system.3. The system of claim 1 , wherein the blower generates a negative pressure to draw in air external to the housing through the manifold system.4. The system of claim 1 , wherein the housing includes an inlet and an outlet claim 1 , the inlet having an inlet width greater than an outlet width of the outlet of the housing.5. The system of claim 4 , wherein an exterior opening of the outlet comprises at least one of a screen coupled to an inner diameter of the exterior opening of the outlet claim 4 , a mesh coupled to the inner diameter of ...

ACID GAS REGENERABLE BATTERY

A method of generating electricity from an amine-based acid gas capture process using an electrolytic cell containing an anode and a cathode and an amine based electrolyte comprising: contacting a metal based redox material with an amine based electrolyte in the presence of an anode to form a metal-ammine complex in solution; adding an absorbed or absorbable acid gas to the metal-ammine complex containing electrolyte to form an acid gas absorbed electrolyte; and contacting the acid gas absorbed electrolyte with a cathode deposit, wherein the acid gas breaks up the metal-ammine complex in the metal-ammine complex containing electrolyte thereby generating a potential difference between the anode and the cathode. 1. A method of generating electricity from an amine-based acid gas capture process using an electrolytic cell containing an anode and a cathode and an amine based electrolyte comprising:contacting a metal based redox material with an amine based electrolyte in the presence of an anode to form a metal-ammine complex in solution;adding an absorbed or absorbable acid gas to the metal-ammine complex containing electrolyte to form an acid gas absorbed electrolyte; andcontacting the acid gas absorbed electrolyte with a cathode deposit,wherein the acid gas breaks up the metal-ammine complex in the metal-ammine complex containing electrolyte thereby generating a potential difference between the anode and the cathode.2. A method according to claim 1 , wherein the acid gas comprises at least one of CO claim 1 , NO claim 1 , SO claim 1 , HS claim 1 , HCl claim 1 , HF claim 1 , or HCN or a combination thereof.3. A method according to claim 1 , wherein the acid gas comprises a flue gas.4. A method according to claim 1 , wherein the acid gas includes COas a major component.5. A method according to claim 1 , wherein the metal based redox material comprises at least one of Cu claim 1 , Ni claim 1 , Zn claim 1 , Co claim 1 , Pt claim 1 , Ag claim 1 , Cr claim 1 , Pb claim 1 , ...

ABSORBENT LIQUID FOR CO2 AND/OR H2S, AND APPARATUS AND METHOD USING SAME

An absorbent liquid which absorbs at least one of COand HS from a gas, including a secondary linear monoamine; a tertiary linear monoamine or a sterically hindered primary monoamine; and a secondary cyclic diamine, wherein a concentration of each of the secondary linear monoamine, the tertiary linear monoamine or the sterically hindered primary monoamine; and the secondary cyclic diamine is less than 30% by weight. 1. An absorbent liquid which absorbs at least one of COand HS from a gas , consisting of:water;a secondary linear monoamine;a tertiary linear monoamine; anda secondary cyclic diamine,wherein a concentration of each of the secondary linear monoamine, the tertiary linear monoamine and the secondary cyclic diamine is less than 30% by weight, andwherein the secondary linear monoamine is at least one selected from the group consisting of: N-(methylamino)ethanol, N-(ethylamino)ethanol, N-(propylamino)ethanol, and N-(butylamino)ethanol, andwherein the tertiary linear monoamine is at least one selected from the group consisting of: N-ethyldiethanolamine, N-butylethanolamine, 4-dimethylamino-1-butanol, 2-(dimethylamino)ethanol, 2-(diethylamino)ethanol, 2-di-n-butylaminoethanol, N-ethyl-N-methylethanolamine, 3-dimethylamino-1-propanol, and 2-dimethylamino-2-methyl-1-propanol.2. The absorbent liquid according to claim 1 , wherein the concentration of the secondary cyclic diamine is less than the concentration of the secondary linear monoamine and is less than the concentration of the tertiary linear monoamine in weight percent relative to the absorbent liquid.3. The absorbent liquid according to claim 2 , the concentration of the secondary linear monoamine is from 10% by weight to 28% by weight.4. The absorbent liquid according to claim 3 , wherein the concentration of the tertiary linear monoamine is 20% by weight or more.5. The absorbent liquid according to claim 1 , wherein the tertiary linear monoamine is at least one selected from the group consisting of N- ...

METHOD FOR REGENERATING A USED SORBENT HAVING A GAS ADSORBATE ADSORBED THERETO

The invention relates to methods for regenerating a used sorbent having a gas adsorbate adsorbed thereto. In particular, the used sorbent comprises liquid marbles. The liquid in the liquid marbles is comprised of a material or mixture of materials that selectively removes unwanted gaseous component in the gas to be purified. 1. A method for regenerating a used sorbent having a gas adsorbate adsorbed thereto , comprising exposing the used sorbent to dielectric heating wherein the used particles and/or a mixture of a plurality of particles encapsulating at least one type of liquid therein2. The method according to claim 1 , wherein exposing the used sorbent to dielectric heating comprises exposing the used sorbent to microwave radiation claim 1 ,3. The method according to claim 2 , when the used sorbent is exposed to microwave radiation in microwave synthesizer.4. The method according to claim 3 , wherein the microwave synthesizer is configured to operate at 100 to 1 claim 3 ,200 Watts.5. The method according to claim 4 , wherein the microwave synthesizer is configured to operate at 500 to 1 claim 4 ,200 Watts.6. (canceled)7. The method according to claim 2 , wherein the used sorbent is exposed to microwave radiation for 3 hours or less.8. The method according to claim 7 , wherein the used sorbent is exposed to microwave radiation for 1 hour or less.9. The method according to wherein the used sorbent is exposed to microwave radiation for an interval of 10-30 seconds.10. The method according to claim 2 , wherein the used sorbent is exposed to microwave radiation at 90-150° C.11. The method according to claim 10 , wherein the used sorbent is exposed to microwave radiation at 90-120° C.12. The method according to claim 2 , wherein the used sorbent is exposed to microwave radiation in the absence of an inert purge gas.13. (canceled)14. The method according to claim 1 , wherein the gas adsordate comprises natural gas claim 1 , flue gas claim 1 , carbon monoxide claim 1 , ...

Method of recovering carbon dioxide and recovery apparatus

Change in the amount of an absorbing liquid is detected to restore the original amount, and carbon dioxide is stably recovered from exhaust gas. The carbon dioxide recovery apparatus has: an absorber where a gas contacts with an absorbing liquid that absorbs carbon dioxide contained in the gas; and a regenerator where the absorbing liquid after absorption is heated to release carbon dioxide and is regenerated. Water vapor in the carbon dioxide-containing recovery gas, discharged from the regenerator, is condensed by recovery equipment, and the condensed water is supplied at a fixed flow rate to the regenerator. A liquid level meter detects the liquid level changing with quantity fluctuations of the absorbing liquid. If the liquid level is lowered, a restoration system restores the original liquid level, using the condensed water. The condensed water sufficient for restoring the liquid level is supplied near the liquid level meter.

ENRICHED ACID GAS FOR SULFUR RECOVERY

A system of enriching acid gas for feeding a sulfur recovery unit includes a contactor configured to separate an acid gas stream into a carbon dioxide rich stream and a purified acid gas stream, where the acid gas stream includes hydrogen sulfide, carbon dioxide, and hydrocarbons; a regenerator in fluid communication with the contactor such that the regenerator is configured to separate the purified acid gas stream to create a hydrogen sulfide rich stream and a hydrogen sulfide lean stream; and a recycle stream conduit fluidly coupled between the regenerator to the contactor and configured to supply at least a portion of the hydrogen sulfide rich stream from the regenerator to the contactor. 19-. (canceled)10. A system of enriching acid gas for feeding a sulfur recovery unit , the system comprising:an acid gas stream connector configured to receive an acid gas stream;{'sub': 2', '2, 'a contactor configured to separate the acid gas stream received from the acid gas stream connector into a carbon dioxide rich stream and a purified acid gas stream, the acid gas stream comprising hydrogen sulfide (HS), carbon dioxide (CO), and hydrocarbons;'}a regenerator in fluid communication with the contactor such that the regenerator is configured to separate the purified acid gas stream to create a hydrogen sulfide rich stream and a hydrogen sulfide lean stream, the hydrogen sulfide rich stream having a concentration of hydrogen sulfide;a recycle stream conduit fluidly coupled between the regenerator to the contactor and configured to supply at least a portion of the hydrogen sulfide rich stream from the regenerator to the contactor; and{'sub': '2', 'an acid gas recycle valve coupled to the recycle stream conduit that opens and closes a fluid pathway from the regenerator to the contactor based on an HS content in the hydrogen sulfide rich stream to direct the hydrogen sulfide rich stream exiting the regenerator to combine with the acid gas stream at the acid gas stream connector ...

WATER CONTROL IN NON-AQUEOUS ACID GAS RECOVERY SYSTEMS

This invention is directed to methods and systems for controlling water in acid gas removal processes comprising the steps of a) treating the gas stream in an absorption zone with the NAS absorption liquid; b) direction the acid gas-loaded NAS absorption liquid to a regeneration zone; c) directing the regenerated NAS absorption liquid to step a); and d) controlling the first and second set of conditions. 1. A process for regulating water content and removing acid gases from a water-containing gas stream using a non-aqueous solvent (NAS) absorption liquid which comprises:(a) treating the gas stream in an absorption zone with the NAS absorption liquid under a first set of controlled conditions of temperature, pressure and flow rate to obtain an acid gas-depleted treated gas stream and an acid gas-loaded NAS absorption liquid;(b) directing the acid gas-loaded NAS absorption liquid to a regeneration zone under a second set of controlled conditions of temperature, pressure and flow rate and regenerating the loaded NAS absorption liquid to expel a portion of the acid gases and obtain a regenerated NAS absorption liquid;(c) directing the regenerated NAS absorption liquid to step a); and(d) controlling the first and second set of conditions so as to avoid the necessity of a separation device to separate a water-rich phase from the NAS absorption liquid, to regulate the water content, and remove acid gases from the water-rich gas stream.2. The process of claim 1 , wherein the acid gas is carbon dioxide.3. The process of claim 1 , wherein the water-containing gas stream is from a desulfurization pre-treatment process.4. The process of claim 1 , wherein the water content is regulated such that the quantity of water entering the process in the water-rich gas stream balances the water content leaving the process in the acid gas-depleted treated gas stream or off gases from the regeneration zone.5. The process of claim 1 , wherein the water content is regulated such that the ...

Apparatus for removing an acid gas from a gas stream

An apparatus removes acidic gases from a gas stream. The apparatus remove acid gas from a gas stream in a manner that generates a product gas stream at a higher temperature while consuming less energy than the existing technology. The apparatus enables the positive gas temperature differential to be maintained by manipulating the absorber column operating conditions and/or the solvent chemistry to increase the amount of absorption and reaction in the absorber.

ENRICHED ACID GAS FOR SULFUR RECOVERY

A method of sulfur enriching an acid gas stream in an acid gas enrichment system includes: (i) feeding an acid gas stream to a contactor, the acid gas stream comprising hydrogen sulfide (H2S), carbon dioxide (CO2), and hydrocarbons; (ii) separating the acid gas stream in the contactor to create a carbon dioxide rich stream and a purified acid gas stream; (iii) feeding the purified acid gas stream to a regenerator fluidly connected to the contactor; (iv) separating the purified acid gas stream in the regenerator to create a hydrogen sulfide rich stream and a hydrogen sulfide lean stream, the hydrogen sulfide rich stream having a concentration of hydrogen sulfide; and (v) periodically feeding at least a portion of the hydrogen sulfide rich stream exiting the regenerator to the acid gas stream entering the contactor. 1. A method of sulfur enriching an acid gas stream in an acid gas enrichment system , the method comprising:{'sub': 2', '2, 'feeding an acid gas stream to a contactor, the acid gas stream comprising hydrogen sulfide (HS), carbon dioxide (CO), and hydrocarbons;'}separating the acid gas stream in the contactor to create a carbon dioxide rich stream and a purified acid gas stream;feeding the purified acid gas stream to a regenerator fluidly connected to the contactor;separating the purified acid gas stream in the regenerator to create a hydrogen sulfide rich stream and a hydrogen sulfide lean stream, the hydrogen sulfide rich stream having a concentration of hydrogen sulfide; andperiodically feeding at least a portion of the hydrogen sulfide rich stream exiting the regenerator to the acid gas stream entering the contactor.2. The method of claim 1 , wherein the periodically feeding step comprises adjusting a recycle valve disposed along a fluid pathway that directs the hydrogen sulfide rich stream exiting the regenerator to the acid gas stream entering the contactor.3. The method of claim 2 , wherein the adjusting the recycle valve comprises opening or closing ...

GAS DESORPTION

The invention relates to a gas desorption unit and a process for desorbing gas absorbed in an absorption liquid, and a gas separation process. A gas desorption unit, comprising an assembly of plates, wherein plates comprise a corrugated part comprising ridges and valleys, and a first channel there between, adapted for counter-current flow of said gaseous and liquid stream in said first channel, and a said second channel for a liquid stream in counter-current flow with the liquid stream in the first channel, wherein a first channel comprises a corrugated part of a first plate comprising ridges crossing with ridges of the corrugated part of a second plate, and wherein a second channel comprises ridges of a corrugated part of a second plate comprising ridges aligned with valleys of a corrugated part of a third plate. 1. A gas desorption unit comprising an assembly of plates , said assembly comprising a first , second and third plate , each plate comprising a corrugated part comprising ridges and valleys , the corrugated parts of the first and second plate defining a part of a first channel between them , the corrugated parts of the second and third channel defining between them a part of a second channel adjacent to said part of said first channel ,wherein each of the first, second and third plate has opposed lateral ends, wherein the first channel comprises an inlet and an outlet for a gaseous stream at opposed lateral ends and an inlet and an outlet at opposed lateral ends for a liquid stream in counter-current flow with said gaseous stream, andwherein said second channel comprises an inlet and an outlet at opposed lateral ends for a liquid stream in counter-current flow with the liquid stream in the first channel,wherein the first channel comprises a corrugated part of the first plate comprising ridges crossing with ridges of the corrugated part of the second plate, and wherein the second channel comprises ridges of a corrugated part of the second plate comprising ...

ACIDIC GAS ABSORBENT, ACIDIC GAS REMOVAL METHOD AND ACIDIC GAS REMOVAL APPARATUS

The embodiments provide an acidic gas absorbent having low diffusibility, an acidic gas removal method employing the acidic gas absorbent, and also an acidic gas removal apparatus employing the absorbent. The acidic gas absorbent according to the embodiment comprises: a particular tertiary amine compound, such as, an alkyl dialkanol amine or a hydroxyalkyl piperazine; a halogen-free ionic surfactant; and an aqueous solvent. The embodiments provide not only the acidic gas absorbent but also an acidic gas removal method and apparatus employing the acidic gas absorbent. 2. The acidic gas absorbent according to claim 1 , wherein said amine compound is contained in an amount of 3 to 80 wt % based on the total mass of the absorbent.3. The acidic gas absorbent according to claim 1 , wherein said halogen-free ionic surfactant is contained in an amount of 0.1 to 40 ppm.4. The acidic gas absorbent according to claim 1 , wherein said halogen-free ionic surfactant has an ionic group selected from the group consisting of carboxy group claim 1 , sulfo group claim 1 , phosphate group claim 1 , amino group and ammonium group.5. The acidic gas absorbent according to claim 1 , which has a surface tension of 40 mN/m or more at 25° C. before carbon dioxide is introduced thereinto.6. The acidic gas absorbent according to claim 1 , which has a viscosity of 1 to 200 mPa·s at 25° C.7. An acidic gas removal method in which{'claim-ref': {'@idref': 'CLM-00001', '#text': 'claim 1'}, '#text': 'an acidic gas-containing gas is brought into contact with the acidic gas absorbent according to so as to remove the acidic gas from the acidic gas-containing gas.'}8. An acidic gas removal apparatus comprising:{'claim-ref': {'@idref': 'CLM-00001', '#text': 'claim 1'}, '#text': 'an absorption unit in which an acidic gas-containing gas is brought into contact with the acidic gas absorbent according to , so that the absorbent absorbs the acidic gas to remove it from the acidic gas-containing gas; and'}a ...

CARBON DIOXIDE RECOVERY

Carbon dioxide is separated from flue gas by scrubbing the gas with an aqueous solution of an amine and salt, and the COis therefore released from the solution by heating. The scrubbing step is performed with a co-current stream of an aqueous solution of the amine and a salt. 1a. burning a fossil fuel to create a supply of flue gas containing carbon dioxide at a fossil site;b. continuously transporting the flue gas supply to the top of an absorption column packed with an aqueous solution of an amine chosen from the group consisting of N-Propylamine and monoethanolamine and a salt chosen from the group consisting of Na Cl and K Cl while replenishing the solution to the top of the column thereby scrubbing the flue gas by a downward co-current flow of the gas and the solution though the column at a temperature of between 15° C. and 50° C. thereby saturating the solution with carbon dioxide to produce a bicarbonate and ammonia chloride;c. thereafter heating the carbon dioxide enriched solution taken from the bottom of the column to release the absorbed carbon dioxide; andd. recycling the regenerated aqueous solution to the top of the column to replenish the solution for step (b).. A system for recovery carbon dioxide from a flue gas containing carbon dioxide comprising the steps of: This application is a divisional of U.S. patent application Ser. No. 15/966,459 filed Apr. 30, 2018, which is a continuation-in-part of U.S. patent application Ser. No. 15/600,043 filed May 19, 2017, which is a continuation-in part of U.S. patent application Ser. No. 14/798,827 filed Jul. 14, 2015, and hereby incorporates by reference the priority dates and contents of said applications in their entirety.The present invention relates to a process for the recovery of carbon dioxde from flue gases. The process uses an aqueous solution of salt and an amine to scrub the flue gas and absorb carbon dioxide. The resulting solution is regenerated by heating it in order to strip out pure carbon ...

Process for co2 capture using micro-particles comprising biocatalysts

A process for desorbing CO 2 gas from an ion-rich aqueous mixture comprising bicarbonate and hydrogen ions, includes providing micro-particles in the ion-rich aqueous mixture; and feeding the ion-rich aqueous mixture into a desorption reactor; the micro-particles comprising a support material and biocatalysts supported and stabilized by the support material and being sized and provided in a concentration in the desorption reactor such that the micro-particles are carried with the ion-rich aqueous mixture to promote transformation of the bicarbonate and hydrogen ions into CO 2 gas and water, thereby producing a CO 2 gas stream and an ion-depleted solution.

COMPOSITE AMINE ABSORBENT, AND DEVICE AND METHOD FOR REMOVING CO2 OR H2S, OR BOTH OF CO2 AND H2S

A composite amine absorbent according to the present invention is an absorbent for absorbing COor HS, or both of COand HS in a gas. The absorbent is obtained by dissolving (1) a linear monoamine, (2) a diamine, and (3) propylene glycol alkyl ether, for example, represented by the following chemical formula (I) in water. In the composite amine absorbent, the components complexly interact, and the synergistic effect thereof provides good absorbability of COor HS, or both of COand HS and good releasability of COor HS absorbed during regeneration of the absorbent. Furthermore, the amount of water vapor in a reboiler used during regeneration of the absorbent in a COrecovery unit can be reduced. 1. A composite amine absorbent for absorbing COor HS , or both of COand HS in a gas , the composite amine absorbent being obtained by dissolvinga linear monoamine,a diamine, and [{'br': None, 'sup': 1', '2', '3, 'sub': 'n', 'R—O—(R—O)—R\u2003\u2003(I)'}, {'sup': '1', 'claim-text': [{'sup': '2', 'Ris a propylene group,'}, {'sup': '3', 'Ris hydrogen, and'}, 'n is 1 to 3., 'wherein Ris a hydrocarbon group having 2 to 4 carbon atoms,'}], 'a first ether bond-containing compound of following chemical formula (I) in water2. The composite amine absorbent according to claim 1 , whereinthe first ether bond-containing compound of the chemical formula (I) is propylene glycol alkyl ether, andalkyl ether in the propylene glycol alkyl ether is any of ethyl ether, propyl ether, and butyl ether.3. A composite amine absorbent for absorbing COor HS claim 1 , or both of COand HS in a gas claim 1 , the composite amine absorbent being obtained by dissolvinga linear monoamine,a diamine, and [{'br': None, 'sup': 4', '5', '6, 'sub': 'n', 'R—O—(R—O)—R\u2003\u2003(II)'}, {'sup': '4', 'wherein Ris an acetyl group,'}, {'sup': '5', 'Ris an ethylene group,'}, {'sup': '6', 'Ris an alkyl group, and'}, 'n is 1., 'a second ether bond-containing compound of following chemical formula (II) in water4. The composite ...

GAS SEPARATION BY VAPORIZED COMPOUND

An improved process for deacidizing a gaseous mixture with reduced overall energy costs is described. The process involves contacting the gaseous mixture with at least one of a vaporizing compound, a vaporized compound, a vaporizing solution of compound and a vaporized solution of compound, and forming a liquid or solid reaction product that can be easily separated from the gaseous mixture. 1. A method for deacidizing a gas stream comprising one or more acid gases , comprising:mixing a compound with the gas stream, wherein the compound reacts with the one or more acid gases in the gas stream to form a reaction product in a gas phase;causing the reaction product to precipitate from the gas phase in a form of a liquid or a solid; andcollecting the liquid or the solid reaction product.2. The method of claim 1 , further comprising processing the liquid or the solid reaction product to release the compound from the reaction product.3. The method of claim 2 , further comprising mixing the released compound with the gas stream.4. The method of claim 1 , wherein the one or more acid gases are selected from the group consisting of carbon dioxide (CO) claim 1 , sulfur dioxide (SO) claim 1 , sulfur trioxide (SO) claim 1 , hydrogen sulfide (HS) claim 1 , carbon oxysulfide (COS) claim 1 , carbon disulfide (CS) claim 1 , mercaptans (RSH) claim 1 , nitric oxide (NO) claim 1 , nitric dioxide (NO) claim 1 , fluorides claim 1 , HCl claim 1 , and HF.5. The method of claim 1 , wherein the compound comprises an amine selected from the group consisting of monoethanolamine claim 1 , diethanolamine claim 1 , triethanolamine claim 1 , ethanolamines claim 1 , isopropanolamines claim 1 , ethyleneamines claim 1 , alkyl alkanolamines claim 1 , methyldiethanolamine claim 1 , piperidine claim 1 , piperazine claim 1 , dibutylamine claim 1 , diisopropylamine claim 1 , and a mixture thereof.6. The method of claim 1 , further comprising vaporizing the compound.7. The method of claim 6 , wherein the ...

CARBON DIOXIDE ABSORBENT AND APPARATUS OF SEPARATING AND RECOVERING CARBON DIOXIDE

A carbon dioxide absorbent of an embodiment includes a chain amine, a cyclic amine, and an acid. The chain amine is a compound expressed by Formula (1) of FIG. . Rin Formula (1) is hydrogen or an alkyl chain having at least one hydroxyl group and 1 to 7 carbon atoms. Rin Formula (1) is an alkyl chain having at least one hydroxyl group and 1 to 7 carbon atoms. Rin Formula (1) is hydrogen, a straight alkyl chain having 1 to 7 carbon atoms, a branched alkyl chain having 1 to 7 carbon atoms, or a cyclic alkyl chain having 5 to 7 carbon atoms. 2. The absorbent according to claim 1 , wherein a pH of the carbon dioxide absorbent before absorbing carbon dioxide is 9.5 or more to 10.8 or less.3. The absorbent according to claim 1 , wherein a molar ratio of the cyclic amine to the acid is 1.0:0.1 or more to 1.0:1.9 or less.5. The absorbent according to claim 1 , wherein the acid has pKa of 6.0 or less.6. The absorbent according to claim 1 , wherein the acid is at least one selected from the group consisting of hydrochloric acid claim 1 , phosphoric acid claim 1 , sulfuric acid claim 1 , nitric acid claim 1 , hydroiodic acid claim 1 , acetic acid claim 1 , citric acid claim 1 , formic acid claim 1 , gluconic acid claim 1 , lactic acid claim 1 , oxalic acid claim 1 , tartaric acid claim 1 , and an organic acid having a sulfo group.7. The absorbent according to claim 1 , wherein the acid includes an organic acid having a sulfo group expressed by Formula (4); an organic acid having a sulfo group expressed by Formula (5); or an organic acid having a sulfo group expressed by Formula (4) and an organic acid having a sulfo group expressed by Formula (5) claim 1 ,{'sup': '10', 'Rin Formula (4) is an organic group including an alkyl group, an aryl group, or an alkyl group and an aryl group, optionally including an amino group, a hydroxyl group, or an amino group and a hydroxyl group, and having a straight chain structure with 1 to 5 carbon atoms in the straight chain or a branched ...

ACIDIC GAS ABSORBENT, ACIDIC GAS REMOVAL METHOD AND ACIDIC GAS REMOVAL APPARATUS

The embodiments provide an acidic gas absorbent, an acidic gas removal method, and an acidic gas removal apparatus. The absorbent absorbs an acidic gas in a large amount and hardly diffuses in air. The acidic gas absorbent according to the embodiment comprises an amine compound having a sulfonyl group and two or more amino groups. 1. An acidic gas absorbent comprising an aliphatic amine compound having a sulfonyl group and two or more amino groups.3. The acidic gas absorbent according to claim 1 , wherein said unsubstituted or substituted alkyl group contains 1 to 4 carbon atoms.4. The acidic gas absorbent according to claim 1 , wherein said integer represented by n is 1 to 3.6. The acidic gas absorbent according to claim 1 , which comprises said aliphatic amine compound in an amount of 3 to 60 wt % provided that the whole amount of the absorbent is regarded as 100 wt %.7. The acidic gas absorbent according to claim 1 , which further contains an aminoalcohol or a piperazine derivative.8. The acidic gas absorbent according to claim 1 , further comprises at least one additive agent selected from the group consisting of oxidation inhibitors claim 1 , pH adjusters claim 1 , defoaming agents claim 1 , and anticorrosive agents.9. An acidic gas removal method in which a gas containing an acidic gas is brought into contact with the acidic gas absorbent according to so as to remove the acidic gas from the acidic gas-containing gas.10. An acidic gas removal apparatus comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'an absorption unit in which a gas containing an acidic gas is brought into contact with the acidic gas absorbent according to , so that the absorbent absorbs the acidic gas to remove it from the acidic gas-containing gas; and'}a regeneration unit in which the absorbent holding the acidic gas is made to desorb the acidic gas so as to be regenerated;so that the absorbent regenerated in the regeneration unit is reused in the absorption unit. This ...

ACIDIC GAS ABSORBENT, ACIDIC GAS REMOVAL METHOD AND ACIDIC GAS REMOVAL APPARATUS

The embodiments provide an acidic gas absorbent having low diffusibility, an acidic gas removal method, and an acidic gas removal apparatus. The acidic gas absorbent according to the embodiment comprises: an amine compound having a vapor pressure of 0.001 to 10 Pa at 20° C.; a water-soluble polymer compound having a mass-average molecular weight of 900 to 200000 and not containing a functional group having a pKa value greater than 7 except for hydroxy; and water. 1. An acidic gas absorbent comprising:an amine compound having a vapor pressure of 0.001 to 10 Pa at 20° C.;a water-soluble polymer compound which has a mass-average molecular weight of 900 to 200000 and which does not contain a functional group having a pKa value greater than 7 except for hydroxy; andwater.2. The acidic gas absorbent according to claim 1 , wherein said water-soluble polymer compound contains only functional groups selected from the group consisting of hydroxy claim 1 , oxy claim 1 , carboxy and carboxylato.3. The acidic gas absorbent according to claim 1 , wherein said water-soluble polymer compound is a water-soluble vinyl polymer or a water-soluble polysaccharide.4. The acidic gas absorbent according to claim 1 , wherein said water-soluble polymer compound is at least one selected from the group consisting of: carboxy vinyl polymer claim 1 , alkali metal salts of carboxy vinyl polymer claim 1 , polyvinyl alcohol claim 1 , polyvinylpyrrolidone claim 1 , cellulose claim 1 , carboxymethyl cellulose claim 1 , methyl cellulose claim 1 , pectin claim 1 , gum arabic claim 1 , alginic acid claim 1 , and xanthan gum.5. The acidic gas absorbent according to claim 1 , wherein said amine compound is an aminoalcohol or a tertiary amine.6. The acidic gas absorbent according to claim 1 , wherein said amine compound has a vapor pressure of 0.005 to 5 Pa at 20° C.7. The acidic gas absorbent according to claim 1 , which has a viscosity of 10 to 200 mPa·s at 20° C. before brought into contact with an ...

AQUEOUS CO2 ABSORBENT COMPRISING 2-AMINO-2-METHYL-1-PROPANOL AND 3-AMINOPROPANOL OR 2-AMINO-2-METHYL-1-PROPANOL AND 4-AMINOBUTANOL

An aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1-propanol (AMP) and 3-aminopropanol (AP), or AMP and 4-aminobutanol (AB), is described. A method for capturing CO2 from a CO2 containing gas using the mentioned absorbent, and the use of a combination of AMP and AP, or a combination of AMP and AB are also described. 19-. (canceled)10. A method for separating CO2 from a CO2 containing gas , where the COis captured by countercurrent flow to an absorbent in an absorber to give a COlean flue gas that is released into the surroundings , and a COrich absorbent that is regenerated in a regeneration column , by adding heat , to give a COrich gas that is treated further , and regenerated CO2 lean absorbent that is recycled to the absorber for reuse , wherein the circulating CO2 absorbent is an aqueous CO2 absorbent comprising:2-amino-2-methyl-1-propanol (AMP); and 3-aminopropanol (AP); and', '4-aminobutanol (AB)., 'one of11. The method according to claim 10 , wherein the concentration of AMP is from 10 to 35% by weight and the concentration of AP or AB is from 10 to 40% by weight.12. The method according to claim 10 , wherein the concentration of AMP is from 20 to 35% by weight.13. The method according to claim 10 , wherein the concentration of AMP is from 25 to 35% by weight.14. The method according to claim 10 , wherein the concentration of AMP is from 30 to 35% by weight.15. The method according to claim 10 , wherein the concentration of AP or AB is from 20 to 40% by weight.16. The method according to claim 10 , wherein the concentration of AP or AB is from 25 to 40% by weight.17. The method according to claim 10 , wherein the concentration of AP or AB is from 30 to 40% by weight.18. The method according to claim 10 , wherein the absorbent comprises a combination of AMP and AP.19. The method according to claim 18 , wherein the concentration of AMP is from 10 to 35% by weight and the concentration of AP is from 10 to 40% by weight.20. The method ...

TAIL GAS UTILIZATION FOR MIXED ALCOHOLS PRODUCTION

It has been discovered that mixed-alcohol production can utilize the waste tail gas stream from the pressure-swing adsorption section of an industrial hydrogen plant. Some variations provide a process for producing mixed alcohols, comprising: obtaining a tail-gas stream from a methane-to-syngas unit (e.g., a steam methane reforming reactor); compressing the tail-gas stream; separating the tail-gas stream into at least a syngas stream, a CO-rich stream, and a CH-rich stream; introducing the syngas stream into a mixed-alcohol reactor operated at effective alcohol synthesis conditions in the presence of an alcohol-synthesis catalyst, thereby generated mixed alcohols; and purifying the mixed alcohols to generate a mixed-alcohol product. Other variations provide a process for producing clean syngas, comprising: obtaining a tail-gas stream from a methane-to-syngas unit; compressing the tail-gas stream; separating the tail-gas stream into at least a syngas stream, a CO-rich stream, and a CH-rich stream; and recovering a clean syngas product. 1. A process for producing mixed alcohols , said process comprising:{'sub': 2', '2', '4, '(a) obtaining a tail-gas stream from a methane-to-syngas unit, wherein said tail-gas stream comprises CO, CO, H, and CH;'}(b) compressing said tail-gas stream;{'sub': 2', '4, '(c) separating said tail-gas stream into at least a syngas stream, a CO-rich stream, and a CH-rich stream;'}(d) introducing said syngas stream into a mixed-alcohol reactor operated at effective alcohol synthesis conditions and in the presence of an alcohol-synthesis catalyst, thereby generated mixed alcohols and a reactor off-gas; and(e) optionally purifying said mixed alcohols to generate a mixed-alcohol product.2. The process of claim 1 , wherein said tail-gas stream is an output of a first pressure-swing adsorption unit.3. The process of claim 1 , wherein said CO-rich stream is compressed and used in enhanced oil recovery.4. The process of claim 1 , wherein said CO-rich ...

COMBINED ACID GAS REMOVAL AND WATER FILTRATION SYSTEM

The combined acid gas removal and water filtration system () removes sour gases, such as hydrogen sulfide (H2S) and carbon dioxide (CO2), from an input gaseous hydrocarbon stream (FG), as well as producing purified water (TW). The acid gas removal system () has a contactor () for contacting the input gaseous stream (FG) with an absorption liquid solvent (ALS), and a stripper () for recycling the absorption liquid solvent (ALS) and removing acidic gases (AG) therefrom. A first heat exchanger () heats used absorption liquid solvent (UALS) output from the contactor () prior to injection into the stripper (). A second heat exchanger () cools recycled absorption liquid solvent (RALS) using a refrigerant (R) before injection back into the contactor (). The refrigerant (R) is coupled with an absorber (), which receives a dilute ethanolic draw solution (DDS) from a forward osmosis filtration system (), producing purified water (TW). 1. A combined acid gas removal and water filtration system , comprising:an absorption liquid solvent capable of removing acidic gases from gaseous hydrocarbons;a refrigerant; a gas inlet adapted for receiving a stream of gaseous hydrocarbons;', 'a gas outlet adapted for providing an outlet for the gaseous hydrocarbons after removal of acidic gases therefrom, the gaseous hydrocarbons being contacted by the absorption liquid solvent and the acidic gases being removed therefrom by absorption into the absorption liquid solvent inside the contactor;', 'an absorption liquid inlet for introducing the absorption liquid solvent into the contactor; and', 'an absorption liquid outlet for removing used absorption liquid solvent having the acidic gases absorbed therein from the contactor;, 'a contactor havinga first heat exchanger in fluid communication with the contactor, the first heat exchanger being configured for receiving the used absorption liquid solvent and heating the used absorption liquid solvent to output heated solvent;a stripper in fluid ...

HYDROGEN SULFIDE SCAVENGERS

Disclosed herein are scavenging compounds and compositions useful in applications relating to the production, transportation, storage, and separation of crude oil and natural gas. Also disclosed herein are methods of using the compounds and compositions as scavengers, particularly in applications relating to the production, transportation, storage, and separation of crude oil and natural gas. 4. The composition of claim 3 , wherein x is 1 claim 3 , y is 1 claim 3 , z is 0 claim 3 , Rand Rare each alkylenyl claim 3 , and Ris hydrogen. The present disclosure relates generally to scavengers of sulfur-based species, and more particularly to alkanolamine formaldehyde compounds and compositions as scavengers of hydrogen sulfide and/or mercaptans.The removal of sulfur-based species from liquid or gaseous hydrocarbon streams is a problem that has long challenged many industries. Hydrogen sulfide is a huge problem in the oil industry, particularly in the drilling, production, transportation, storage, and processing of crude oil, as well as waste water associated with crude oil. The same problems exist in the natural gas industry.The presence of sulfur-containing compounds such as hydrogen sulfide can result in the deposition of sulfur containing salts, which can cause plugging and corrosion of transmission pipes, valves, regulators and other process equipment. Even flared natural gas needs to be treated to avoid acid rain generation due to SOformation. Also, in the manufactured gas industry or coke making industry, coal-gas emissions containing unacceptable levels of hydrogen sulfide are commonly produced from destructive distillation of bituminous coal.Since hydrogen sulfide has an offensive odor and natural gas containing it is called “sour” gas, treatments to lower hydrogen sulfide are termed “sweetening” processes. When a particular compound is used to remove or lower HS, it is called scavenging agent.Despite the availability of scavengers for use in the oil and gas ...

COMPLEX AMINE ABSORBENT, AND DEVICE AND METHOD FOR REMOVING ONE OR BOTH OF CO2 AND H2S

An absorbent is prepared by dissolving in water 1) monoethanolamine (MEA) and 2) a primary amine represented by the following formula (1) and having high steric hindrance. Releasability of COor HS during regeneration of the absorbent is thereby improved, and the amount of water vapor used during regeneration of the absorbent in a facility for recovering COor HS can be reduced. 2. The complex amine absorbent according to claim 1 , wherein the primary amine having high steric hindrance is at least one of 2-amino-1-propanol claim 1 , 2-amino-1-butanol claim 1 , 2-amino-3-methyl-1-butanol claim 1 , 1-amino-2-propanol claim 1 , 1-amino-2-butanol claim 1 , and 2-amino-2-methyl-1-propanol.3. (canceled)4. The complex amine absorbent according to claim 1 , whereinthe linear poly primary and secondary amines are ethylenediamine, N,N′-dimethylethylenediamine, N,N′-diethylethylenediamine, propanediamine, and N,N′-dimethylpropanediamine, andthe cyclic polyamines are piperazine, 1-methylpiperazine, 2-methylpiperazine, 2,5-dimethylpiperazine, 1-(2-aminoethyl)piperazine, and 1-(2-hydroxyethyl)piperazine.5. The complex amine absorbent according to claim 1 , wherein{'sub': 2', '2', '2', '2, 'the complex amine absorbent is circulated and reused in an absorbing-removing facility including an absorber for absorbing one or both of COand HS in the gas and a regenerator in which the one or both of COand HS absorbed are released to regenerate the absorbent,'}a pressure inside the regenerator is 130 to 200 kPa (absolute pressure),an absorption temperature in the absorber is 30 to 80° C., anda regeneration temperature in the regenerator is 110° C. or higher.6. A device for removing one or both of COand HS claim 1 , the device comprising: an absorber for removing one or both of COand HS by bringing a gas containing one or both of COand HS in contact with an absorbent; and a regenerator for regenerating a solution containing the one or both of COand HS absorbed therein claim 1 , the solution ...

Removal of hydrogen sulphide and carbon dioxide from a stream of fluid

A process for removing hydrogen sulfide and carbon dioxide from a fluid stream comprises a) an absorption step in which the fluid stream is contacted with an absorbent comprising an aqueous solution (i) of an amine of the general formula (I) in which R 1 , R 2 and R 3 are each independently selected from C 1-4 -alkyl and C 1-4 -hydroxyalkyl; each R 4 is independently selected from hydrogen, C 1-4 -alkyl and C 1-4 -hydroxyalkyl; each R 5 is independently selected from hydrogen, C 1-4 -alkyl and C 1-4 -hydroxyalkyl; X is OH or NH(CR 1 R 2 R 3 ); m is 2, 3, 4 or 5; n is 2, 3, 4 or 5; and o is 0 or 1; and optionally (ii) at least one tertiary amine, where the molar ratio of (i) to (ii) is greater than 0.05; wherein at least 90% of the hydrogen sulfide is removed from the fluid stream and selectivity for hydrogen sulfide over carbon dioxide is not greater than 8, wherein a CO 2 - and H 2 S-laden absorbent is obtained; b) a regeneration step in which at least a substream of the CO 2 - and H 2 S-laden absorbent is regenerated and a regenerated absorbent is obtained; and c) a recycling step in which at least a substream of the regenerated absorbent is recycled into the absorption step a). The process allows a high level of hydrogen sulfide removal with a simultaneously high coabsorption of carbon dioxide.

Process for the high temperature selective absorption of hydrogen sulfide

A high temperature selective absorption process for treating a gas stream having concentrations of both hydrogen sulfide and carbon dioxide to yield a treated gas stream having a reduced hydrogen sulfide concentration. The high temperature selective absorption process uniquely utilizes a novel absorbent composition which enables the processing of the gas stream under difficult absorption conditions and provides for other features of the inventive absorption process.

Sterically Hindered Amines and Associated Methods

Amine compositions comprising sterically hindered amines and associated methods are provided. In some embodiments, amine compositions of the present disclosure may be useful for selective removal of HS from an acidic gas stream. 2. The mixture of claim 1 , wherein x is an integer from 7 to 14.3. The mixture of claim 1 , wherein y is an integer from 7 to 14.4. The mixture of claim 1 , wherein x is an integer from 7 to 14 and y is an integer from 7 to 14.5. The mixture of claim 1 , wherein the weight ratio of the first amine to the second amine is about 4:1.6. The mixture of claim 1 , wherein the polyethylene glycol has a molecular weight of from about 180 g/mol to about 400 g/mol.7. The mixture of claim 1 , wherein the polyethylene glycol has a molecular weight of from about 200 g/mol to about 300 g/mol.8. The mixture of claim 1 , wherein the reaction occurs in the presence of hydrogen.10. The amine composition of wherein the weight ratio of the first amine to the second amine is about 4:1.11. A mixture comprising the amine composition of and a liquid medium comprising water or an organic solvent or a mixture thereof.12. The mixture of further comprising a strong acid. This application claims the benefit of U.S. patent application Ser. No. 15/070,050, filed Mar. 15, 2016, currently pending, and U.S. patent application Ser. No. 13/989,137, filed Jul. 10, 2013, now U.S. Pat. No. 9,352,271, and U.S. Provisional Patent Application Ser. No. 61/418,425 filed Dec. 1, 2010, the entire disclosures of which are incorporated herein by reference.The present disclosure generally relates to sterically hindered amines, and more specifically, to the production of sterically hindered amines from polyethylene glycol and tertiarybutylamine and their use in acidic gas removal.Various amine solutions have been used for the removal of acidic gases from gases and liquids. Common acidic gases may include, CO, HS, CS, HCN, COS and oxygen and sulfur derivatives of Cto Chydrocarbons. In ...

Component Separations in Polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof. 1. A system comprising:a first polymerization reactor for polymerizing olefin monomers to yield a mid-polymerization product stream;a separator for separating the mid-polymerization product stream into a mid-gas stream and a mid-polymer stream; anda second polymerization reactor for polymerizing the mid-polymer stream,wherein the mid-gas stream comprises ethane, unreacted ethylene, and hydrogen.2. The system of claim 1 , wherein the separator comprises a flash tank for reducing a pressure of the mid-polymerization product stream so as to flash ethane claim 1 , unreacted ethylene; hydrogen claim 1 , or combinations thereof.3. The system of claim 1 , wherein the mid-polymerization product stream comprises hydrogen claim 1 , ethane claim 1 , unreacted ethylene claim 1 , isobutane claim 1 , and polyethylene; and wherein the mid-polymer stream comprises polyethylene and isobutane.4. The system of claim 1 , further comprising:an absorption reactor for contacting the mid-gas stream with an absorption solvent system to absorb at least a portion of the unreacted ethylene from the mid-gas stream and to yield ethane in a waste gas stream.5. The system of claim 4 , further comprising:a processing device to receive ethane from the absorption reactor and to convert ethane ...

APPARATUS AND COMBINED PROCESS FOR CARBON DIOXIDE GAS SEPARATION

An apparatus and a combined process for carbon dioxide gas separation, combining the hydrate-based process with the chemical absorption process, which reduces secondary pollution and allows the efficient continuous separation of carbon dioxide gas without increasing the pressure and thereby the operating cost is reduced significantly. The apparatus and combined process can be applied in the separation of carbon dioxide in IGCC synthetic gas, natural gas and biogas, and address the issues of the existing processes such as high energy consumption, low throughput, and secondary pollution. 1. An apparatus for carbon dioxide gas separation , comprising a gas source , a flow distributor , a gas flow meter , a venturi jet unit provided with two liquid inhaling inlets , a tubular hydrate reaction unit , a gas-liquid-solid three-phase separation unit , a first slurry pump , a hydrate dissociation unit provided with a first pressure maintaining valve at its top , a second slurry pump , and a solution saturation tank provided with a third safety valve at its top , which are communicated sequentially , further comprising a chemical absorption tower , a second corrosion-resistant pump , a heat exchanger , a regeneration tower , a third corrosion-resistant pump , and a reservoir containing a COchemical absorbent , which are communicated sequentially , wherein ,the reservoir is communicated with an upper portion of the chemical absorption tower through a first corrosion-resistant pump to form a cycle;the flow distributor is communicated with a bottom inlet of the solution saturation tank, and a bottom outlet of the solution saturation tank is communicated with the two liquid inhaling inlets of the venturi jet unit through sequentially a liquid-phase mass flow meter and a ninth stop valve;a second safety valve is disposed at a top of the gas-liquid-solid three-phase separation unit;the gas-liquid-solid three-phase separation unit is communicated with a lower portion of the chemical ...

A REVERSIBLE LIGHT DRIVEN GAS ABSORBENT SOLUTION AND PROCESS

The invention relates to a process for removing a target gas from a gas stream rich in the target gas and to an absorbent solution for absorbing a gas, such as carbon dioxide, from a gas stream. The invention involves the use of a photoactive compound that is convertible from a first state to a second state upon irradiation to facilitate removal or collection of a target gas from a gas stream. 1. A process for removing a target acidic gas from a gas stream rich in the target gas , comprising:contacting the gas stream with an absorbent solution comprising an amine selected from primary, secondary, or tertiary amines, alkanolamines, amino acids, and mixtures thereof, in which the target gas is soluble to form a target gas rich absorbent solution and a gas stream that is lean in the target gas; andconverting a photoactive compound in the gas rich absorbent solution from a first state to a second state to bring about a reduction in pH of the absorbent solution wherein the gas rich absorbent solution comprising the photoactive compound in the first state has a higher absorption capacity for the target acid gas than the gas rich solution with the photoactive compound in the second state to cause desorption of the target gas from the absorbent solution comprising the target gas.2. (canceled)3. The process according to claim 1 , wherein the photoactive compound is a photochromic compound.4. The process according to claim 1 , wherein the step of converting the photoactive compound from the first state to the second state involves irradiation with light.5. The process according to claim 1 , wherein the amine selected from primary claim 1 , secondary or tertiary amines claim 1 , alkanolamines claim 1 , amino acids claim 1 , and mixtures thereof is in an amount to provide an initial pH of from about 9 to about 12 prior to absorption of CO.6. The process according to claim 1 , wherein the converting of the photoactive compound from the first state to the second state comprises a ...

COMPOSITE AMINE ABSORBING SOLUTION, AND DEVICE AND METHOD FOR REMOVING CO2 OR H2S OR BOTH

The composite amine absorbing solution according to the present invention absorbs COor HS or both in a gas, and is obtained by dissolving a linear monoamine, a diamine, and an amide group-containing compound in water. By adopting this composite amine absorbing solution, the composites are interacting in a composite manner, due to an integrated effect of the components, the absorption property of COor HS or both is favorable, the desorption properties of the COor HS absorbed when regenerating the absorbing solution become favorable, and the amount of steam from a reboiler used when regenerating the absorbing solution in a COrecovery device can be reduced. 1. A composite amine absorbing solution which is an absorbing solution that absorbs CO2 or H2S or both in a gas and is obtained by dissolving in water a linear monoamine , a diamine , and an amide group-containing compound.2. The composite amine absorbing solution according to claim 1 , wherein the linear monoamine includes at least one of a primary linear monoamine claim 1 , a secondary linear monoamine claim 1 , and a tertiary linear monoamine3. The composite amine absorbing solution according to claim 1 , wherein the diamine includes at least one of a primary linear polyamine claim 1 , a secondary linear polyamine claim 1 , and a cyclic polyamine.4. The composite amine absorbing solution according to claim 1 , wherein a total concentration of the linear monoamine and the diamine is 40% to 60% by weight of the entire absorbing solution.5. The composite amine absorbing solution according to claim 1 , wherein a blending ratio ((the diamine and the amide group-containing compound)/the linear monoamine) of the diamine and the amide group-containing compound with respect to the linear monoamine (1) is 0.16 to 2.1.6. The composite amine absorbing solution according to claim 1 , wherein a blending ratio between the diamine and the amide group-containing compound is 1:0.4 to 1:54.7. A device for removing COor HS or both ...

COMPOSITE METHOD OF TRAPPING CARBON DIOXIDE IN GAS MIXTURE

A hybrid method for capturing COfrom a gas mixture is provided, comprising a step of contacting the COcontaining gas mixture with a slurry consisting of a liquid medium, imidazole or imidazole derivative(s), and a metal-organic framework material (MOFs). For the slurry system, the mass fraction of the imidazole or imidazole derivative(s) in it ranging from 2 to 50% and the mass fraction of the metal-organic framework material in it ranging from 5 to 25%. In the technical solution provided in the present invention, through combining absorptive separation by the liquid solution in which the imidazole or imidazole derivative(s) is dissolved, adsorption separation by the MOF material suspended in the solution, and selective permeation separation by a liquid medium film forms on the outside surface of the suspended MOFs, an absorption-adsorption hybrid separation effect for COgas mixtures is efficiently achieved. In the COcapture method provided in the present invention, conventional absorption separation and adsorptive separation technologies are effectively combined, furthermore, the addition of imidazole or imidazole derivative(s) substantially increases both the COcapture ability and capture amount of the MOFs/liquid slurry, showing a great potential in industrial applications. 1. A hybrid method for capturing COfrom a gas mixture , comprising a step of contacting the COcontaining gas mixture with a slurry system consisting of a liquid medium , imidazole or imidazole derivative(s) , and a metal-organic framework material , wherein the content of the imidazole or imidazole derivative(s) ranging from 2% to 50% and the content of the metal-organic framework material ranging from 5% to 25% , by weight with respect to the slurry mixture.2. The method according to claim 1 , wherein both the imidazole and the imidazole derivative(s) are 5-membered aromatic heterocyclic compounds having two m-nitrogen atoms in the molecular structure.3. The method according to claim 2 , ...

Carbon dioxide separation and capture apparatus and method of controlling operation of carbon dioxide separation and capture apparatus

A carbon dioxide separation and capture apparatus includes an absorption tower configured to cause an absorbing liquid to absorb a carbon dioxide gas contained in a process gas and a regeneration tower configured to cause the absorbing liquid from the absorption tower to release the carbon dioxide gas. The carbon dioxide separation and capture apparatus further includes an inlet concentration meter configured to measure concentration of an acid component in the process gas supplied to the absorption tower and an outlet concentration meter configured to measure concentration of the acid component in the process gas discharged from the absorption tower. Also included in the carbon dioxide separation and capture apparatus are a supplementary absorbing liquid supply mechanism configured to supply a supplementary absorbing liquid to the main unit and a controller configured to control an amount of the supplementary absorbing liquid supplied to the main unit by the supplementary absorbing liquid supply mechanism based on the concentrations of the acid component measured at the inlet concentration meter and the outlet concentration meter.

THERMAL STAGE AND REDUCTION ABSORPTION SULFUR RECOVERY PROCESS

An elemental sulfur recovery unit comprising a thermal unit configured to combust an acid gas feed comprising hydrogen sulfide, an oxygen source, and a fuel gas to create a reaction furnace outlet stream, comprising elemental sulfur, a waste heat boiler configured to capture heat from the reaction furnace outlet stream to create a waste heat boiler effluent, a condenser configured to condense the waste heat boiler effluent to produce a non-condensed gases stream and a condensed stream comprising elemental sulfur, a process gas reheater configured to generate a hot gases stream, a hydrogenation reactor configured to convert the hot gases stream to create a hydrogenation effluent comprising hydrogen sulfide, a process desuperheater configured to cool the hydrogenation effluent to generate a cooled effluent, and an absorber unit configured to absorb the hydrogen sulfide from the cooled effluent to produce a hydrogen sulfide recycle stream and a waste gas stream. 1. An elemental sulfur recovery unit for processing an acid gas feed to recover elemental sulfur , the elemental sulfur recovery unit comprising: wherein the thermal unit comprises a main burner and a reaction furnace, the main burner configured to combust the acid gas feed, the oxygen source, and the fuel gas to a minimum reaction furnace temperature,', 'wherein the acid gas feed comprises hydrogen sulfide,', 'wherein an amount of the hydrogen sulfide is converted to elemental sulfur in the reaction furnace;, 'a thermal unit, the thermal unit configured to combust the acid gas feed, an oxygen source, and a fuel gas to create a reaction furnace outlet stream,'}a waste heat boiler fluidly connected to the reaction furnace of the thermal unit, the waste heat boiler configured to capture heat from the reaction furnace outlet stream to create a waste heat boiler effluent, wherein the heat captured from the reaction furnace outlet stream heats a boiler feedwater stream to create saturated steam;a sulfur condenser ...

Absorbent and process for selectively removing hydrogen sulfide

An absorbent for the selective removal of hydrogen sulfide from a fluid stream comprising carbon dioxide and hydrogen sulfide, wherein the absorbent contains an aqueous solution, comprising: a) an amine or a mixture of amines of the general formula (I) wherein R 1 is C 1 -C 5 -alkyl; R 2 is C 1 -C 5 -alkyl; R 3 is selected from hydrogen and C 1 -C 5 -alkyl; x is an integer from 2 to 10; and b) an ether or a mixture of ethers of the general formula (II): R 4 —[O—CH 2 —CH 2 ] y —OH; wherein R 4 is C 1 -C 5 -alkyl; and y is an integer from 2 to 10; wherein R 1 and R 4 are identical; wherein the mass ratio of b) to a) is from 0.08 to 0.5. The absorbent is suitable for the selective removal of hydrogen sulfide from a fluid stream comprising carbon dioxide and hydrogen sulfide. The absorbent has a reduced tendency for phase separation at temperatures falling within the usual range of regeneration temperatures for the aqueous amine mixtures and is easily obtainable.

ACID GAS REMOVAL SYSTEM FOR REMOVING ACIDIC GASES FROM GASEOUS HYDROCARBONS

The acid gas removal system for removing acidic gases from gaseous hydrocarbons () removes sour gases, such as hydrogen sulfide (HS) and carbon dioxide (CO), from an input gaseous stream. The system () includes a contactor () for contacting the input gaseous stream with an absorption liquid solvent (ALS), and a stripper () for recycling the absorption liquid solvent (ALS) and removing acidic gases (AG) therefrom, but with the addition of a pair of plate-plate heat exchangers (). The first heat exchanger () heats the used absorption liquid solvent (UALS) output from the contactor () prior to injection into the stripper (). The used absorption liquid solvent (UALS) is heated via heat exchange with the acidic gases (AG) output from the stripper (). The second heat exchanger () cools the recycled absorption liquid solvent (RALS) before injection back into the contactor (). 1. An acid gas removal system for removing acidic gases from gaseous hydrocarbons , the system comprising:an absorption liquid solvent capable of removing acidic gases from gaseous hydrocarbons; a gas inlet adapted for receiving a stream of the gaseous hydrocarbons containing the gaseous hydrocarbons;', 'a gas outlet adapted for providing an outlet for the gaseous hydrocarbons after removal of the acidic gases therefrom, the gaseous hydrocarbons being contacted by the absorption liquid solvent and the acidic gases being removed therefrom by absorption into the absorption liquid solvent inside the contactor;', 'an absorption liquid inlet for introducing the absorption liquid solvent into the contactor; and', 'an absorption liquid outlet for removing used absorption liquid solvent having the acidic gases absorbed therein from the contactor;, 'a contactor havinga stripper for stripping the acidic gases from the used absorption liquid solvent a recovering recycled absorption liquid solvent from the used absorption liquid solvent;a first heat exchanger in fluid communication with the contactor, the first ...

Gas Separation Process Using Membranes with Permeate Sweep to Remove CO2 from Combustion Exhaust

A gas separation process for treating exhaust gases from combustion processes. The invention involves routing a first portion of the exhaust stream to a carbon dioxide capture step, while simultaneously flowing a second portion of the exhaust gas stream across the feed side of a membrane, flowing a sweep gas stream, usually air, across the permeate side, then passing the permeate/sweep gas back to the combustor. 1. A process for controlling carbon dioxide exhaust from a combustion process , comprising:(a) combusting a mixture comprising a fuel and air, oxygen-enriched air, or oxygen in a combustion apparatus, thereby creating an exhaust stream comprising carbon dioxide and nitrogen;(b) routing the exhaust stream to a compression apparatus to compress the exhaust stream, thereby producing a compressed stream;(c) separating a first portion of the compressed stream in a carbon dioxide capture unit adapted to selectively remove carbon dioxide, thereby producing a carbon dioxide-enriched stream and a carbon dioxide-depleted off-gas stream;(d) providing a membrane having a feed side and a permeate side, and being selectively permeable to carbon dioxide over nitrogen and to carbon dioxide over oxygen;(e) passing a second portion of the compressed stream across the feed side;(f) passing air, oxygen-enriched air, or oxygen as a sweep stream across the permeate side;(g) withdrawing from the feed side a carbon dioxide-depleted residue stream;(h) withdrawing from the permeate side a permeate stream comprising oxygen and carbon dioxide;(i) passing the permeate stream to step (a) as at least part of the air, oxygen-enriched air, or oxygen used in step (a); and(j) routing at least one of the carbon dioxide-depleted off-gas stream from step (c) or the carbon dioxide-depleted residue stream from step (g) as a part of a working gas stream to an expander unit, and operating the expander unit, thereby generating power and producing a vent stream.2. The process of claim 1 , wherein the ...

Sterically Hindered Amines and Associated Methods

Amine compositions comprising sterically hindered amines and associated methods are provided. In some embodiments, amine compositions of the present disclosure may be useful for selective removal of HS from an acidic gas stream. 2. The amine composition of wherein x is an integer from 7 to 14.3. The amine composition of wherein y is an integer from 7 to 14.4. The amine composition of wherein x is an integer from 7 to 14 and y is an integer from 7 to 14.5. The amine composition of wherein the weight ratio of the first amine to the second amine is about 4:1.7. The method of further comprising contacting the gaseous stream with a strong acid.8. The method of wherein the strong acid is phosphoric acid or sulfuric acid.9. The method of wherein x is an integer from 7 to 14 and y is an integer from 7 to 14.10. The method of wherein the weight ratio of the first amine to the second amine is about 4:1.11. A mixture comprising the amine composition of and a liquid medium comprising water or an organic solvent or a mixture thereof.12. The mixture of further comprising a strong acid. This application claims the benefit of U.S. patent application Ser. No. 13/989,137, filed Jul. 10, 2013, currently pending, and U.S. Provisional Patent Application Ser. No. 61/418,425 filed Dec. 1, 2010, the entire disclosures of which are incorporated herein by reference.The present disclosure generally relates to sterically hindered amines, and more specifically, to the production of sterically hindered amines from polyethylene glycol and tertiarybutylamine and their use in acidic gas removal.Various amine solutions have been used for the removal of acidic gases from gases and liquids. Common acidic gases may include, CO, HS, CS, HCN, COS and oxygen and sulfur derivatives of Cto Chydrocarbons. In general, the treatment of gases and liquids containing acidic gases, such as COand HS, with certain amine solutions typically results in the simultaneous removal of substantial amounts of both COand HS. ...

CARBON CAPTURE SOLVENTS AND METHODS FOR USING SUCH SOLVENTS

A solvent for recovery of carbon dioxide from gaseous mixture, having alkanolamine, reactive amines acting as promoter or activators, glycol, and a carbonate buffer. A solvent for recovery of carbon dioxide from gaseous mixture, having alkanolamine, reactive amines acting as promoter or activators, sulfolane, and a carbonate buffer. One specific solvent contains less than about 75% by weight of water and has a single liquid phase. 2. The solvent as claimed in claim 1 , further comprising a glycol.3. The solvent as claimed in claim 2 , wherein the glycol is poly ethylene glycol.4. The solvent as claimed in claim 1 , further comprising a sulfolane.5. The solvent as claimed in claim 2 , wherein the glycol is selected from the group consisting of monoethylene glycol (EG) claim 2 , Diethylene Glycol (DEG) claim 2 , Triethylene Glycol claim 2 , Tetraethylene Glycol claim 2 , Methoxytriglycol (MTG). Other physical solvent used as a solvent component are Sulfolane claim 2 , N-Methyl-2-Pyrrolidone (NMP).6. The solvent as claimed in or claim 2 , the solvent is 4less than about 30% by weight of water.7. The solvent as claimed in or claim 2 , wherein the carbonate buffer is a potassium carbonate buffer.8. The solvent as claimed in claim 1 , wherein the promoter is 2% and 30% wt percent.10. The solvent as claimed in or claim 1 , wherein the alkanolamine is selected from group comprising N-methyldiethanolamine (MDEA) claim 1 , 2-(2-aminoethoxy)ethanol claim 1 , Aminoethylethanolamine (AEEA) claim 1 , 2-amino-2methyl-1-proponal (AMP) claim 1 , 2-(ethyamino)-ethanol (EAE) claim 1 , 2-(methylamino)-ethanol (MAE) claim 1 , 2-(diethylamino)-ethanol (DEAE) claim 1 , diisopropanolamine (DIPA) claim 1 , methylaminopropylamine (MAPA) claim 1 , 3-aminopropanol (AP) claim 1 , 2 claim 1 ,2-dimethyl-1 claim 1 ,3-propanediamine (DMPDA) claim 1 , 3-amino-1-cyclohexylaminopropane (ACHP) claim 1 , diglycolamine (DGA) claim 1 , 1-amino-2-propanol (MIPA) claim 1 , 2-methyl-methanolamine (MMEA) ...

Hydrogen Sulfide Scavenging Additive Compositions, and Medium Comprising the Same

The present invention relates to a hydrogen sulfide scavenging additive composition, wherein the composition comprises: 1. A hydrogen sulfide scavenging additive composition , wherein the composition comprises:a. an additive 1 comprising zinc salt of organic acid; andb. at least one activator comprising one or more hydroxyl alkylated amine;wherein the zinc salt of organic acid comprises zinc octoate (ZnOctoate);wherein the activator comprises:(i) tris(2-hydroxypropyl)amine (TIPA);(ii) a propoxylated derivative of tris(2-hydroxypropyl)amine (propoxylated TIPA) having average molecular weight of 1300 to 1400 Dalton;(iii) an ethoxylated derivative of tris(2-hydroxypropyl)amine (ethoxylated TIPA); or(iv) a mixture thereof.27-. (canceled)8. The composition as claimed in claim 1 , wherein the composition further comprise an additive 2 claim 1 , wherein the additive 2 comprises polyphosphoric acid (PPA).9. A method of using the hydrogen sulfide scavenging additive composition as claimed in for scavenging the hydrogen sulfide in a medium.10. The method as claimed in claim 9 , wherein the medium comprises a material capable of forming hydrogen sulphide (HS) or a sulfur compound when in use.11. The method as claimed in claim 9 , wherein the medium is selected from the group comprising hydrocarbons claim 9 , crude oil claim 9 , gasoline claim 9 , diesel oil claim 9 , fuel oil claim 9 , bitumen claim 9 , asphalt including asphalt refinery residue claim 9 , and kerosene oil.12. A method of scavenging hydrogen sulphide in a medium by employing the hydrogen sulfide scavenging additive composition as claimed in .13. A medium comprising hydrogen sulfide (HS) scavenging additive composition claim 1 , wherein the hydrogen sulfide (HS) scavenging additive composition comprises:a. an additive 1 comprising zinc salt of organic acid; andb. at least one activator comprising one or more hydroxyl alkylated amine;wherein the zinc salt of organic acid comprises zinc octoate (ZnOctoate);wherein ...

SEPARATION METHOD AND SEPARATION APPARATUS

A separation apparatus includes a pretreatment section that subjects a target fluid containing an olefin compound to at least one or more of a treatment for reducing an acetylene-based compound, a treatment for reducing a sulfur compound, and a treatment for reducing a fine particle component. In the pretreatment section , one or more treatments selected from a hydrotreating and an adsorption treatment with an adsorbent may be performed as the treatment for reducing the acetylene-based compound, one or more treatments selected from a washing and absorption treatment, an adsorption treatment with an adsorbent, and a hydrodesulfurization treatment may be performed as the treatment for reducing the sulfur compound, and one or more treatments selected from a liquid absorption treatment, a collection treatment, or a filtration treatment with a filter may be performed as the treatment for reducing the fine particle component. 1. A separation method , comprising:a pretreatment step of subjecting a target fluid containing an olefin compound to at least one or more of a treatment for reducing an acetylene-based compound, a treatment for reducing a sulfur compound, and a treatment for reducing a fine particle component; anda separation step of separating the olefin compound from the target fluid that has been subjected to the pretreatment with a Ag-containing separation membrane.2. The separation method according to claim 1 , wherein in the pretreatment step claim 1 , one or more treatments selected from a hydrotreating and an adsorption treatment with an adsorbent are performed as the treatment for reducing the acetylene-based compound.3. The separation method according to claim 1 , wherein in the pretreatment step claim 1 , one or more treatments selected from a washing and absorption treatment claim 1 , an adsorption treatment with an adsorbent claim 1 , and a hydrodesulfurization treatment are performed as the treatment for reducing the sulfur compound.4. The separation ...

POST-COMBUSTION CO2 CAPTURE WITH HEAT RECOVERY AND INTEGRATION

COcapture processes and systems can be improved by recovering thermal energy from particular streams for reuse in the stripping stage. Thermal energy can be recovered from the overhead gas stream of a stripper operated under vacuum pressure conditions, and thermal energy can also be recovered from a flue gas. A heat transfer circuit can be implemented for recovering thermal energy by indirect heat transfer from the overhead gas stream, a flue gas stream, and/or other streams to a heat transfer fluid. The heat transfer circuit can include multiple heat recovery loops arranged in parallel and the heated fluid can be supplied through a reboiler of the stripper to heat the solution in the reboiler. 1. A COcapture process for capturing COfrom flue gas generated by a host facility , the process comprising:{'sub': 2', '2', '2, 'in an absorption stage, directly contacting a flue gas stream with an absorption solution comprising water and a non-carbamate forming absorption compound to absorb COand form a CO-rich solution and a COdepleted gas;'}{'sub': 2', '2', '2', '2, 'in a stripping stage, subjecting the CO-rich solution to vacuum pressure conditions and temperature conditions below 100° C. to cause the release of COfrom the CO-rich solution to form a regenerated solution and an overhead gas stream comprising COand steam;'}recycling the regenerated solution back into the absorption stage as at least part of the absorption solution; and compressing the overhead gas stream or a gas stream derived therefrom to increase a temperature thereof and produce a compressed gas stream;', 'transferring heat from the compressed gas stream to a heat transfer fluid to form a heated fluid; and', 'transferring heat from the heated fluid to the stripping stage., 'subjecting the overhead gas stream to heat recovery, comprising2. The COcapture process of claim 1 , further comprising subjecting at least a portion of the flue gas generated by the host facility to heat recovery and transferring ...

Energy-Efficient Extraction of Acid Gas From Flue Gases

An energy-efficient method of removing carbon dioxide, hydrogen sulfide, and other acid gases from a stream of flue gases. The flue stream is contacted with a predetermined sorbent system to remove acid gases from the flue stream. The acid gas-rich sorbent is then heated to desorb the acid gas for capture and regenerate the sorbent. Heat exchangers and heat pumps are used to reduce utility steam and/or cooling water consumption. 1. A system for separating one or more acidic gases from a gaseous mixture containing the same comprising: 'a regenerator in communication with said absorber, said regenerator adapted to desorb said acidic gas from the acidic gas rich solution of sorbent for capture and to regenerate a lean solution of sorbent that is directed to said absorber;', 'an absorber adapted to receive an acidic gas mixture, said absorber adapted to contact the acidic gas mixture with a lean solution of sorbent to remove one or more acidic gases from the mixture to create an acidic gas rich solution of sorbent;'} 'said combiner in communication with said cross heat exchanger, said combiner combines regenerator condensate from said regenerator with lean solution of sorbent from said cross heat exchanger for transfer to said absorber.', 'a splitter adapted to receive regenerator condensate from said condenser and to direct a portion of the regenerator condensate to said regenerator and a portion of the regenerator condensate to a combiner; and'}, 'a condenser in communication with said regenerator and adapted to receive regenerator condensate;'}, 'a cross heat exchanger in communication with said absorber and said regenerator, said cross heat exchanger adapted to heat said acidic gas rich solution of sorbent and to cool said lean solution of sorbent;'}2. The device of wherein said splitter is adjustable to adjust the amount of regenerator condensate received by said regenerator and said combiner.3. A system for separating one or more acidic gases from a gaseous ...

ABSORBENT SOLUTION CONTAINING A MIXTURE OF 1,2-BIS-(2-DIMETHYLAMINOETHOXY)-ETHANE AND OF 2-[2-(2-DIMETHYLAMINOETHOXY)-ETHOXY]-ETHANOL, AND METHOD OF REMOVING ACID COMPOUNDS FROM A GASEOUS EFFLUENT

The invention relates to an absorbent solution for absorbing acid compounds, such as hydrogen sulfide and carbon dioxide, in a gaseous effluent, containing water and a mixture of amines comprising 1,2-bis-(2-dimethylaminoethoxy)-ethane and 2-[2-(2-dimethylaminoethoxy)-ethoxy]-ethanol, of respective formulas (I) and (II) below, and to a method of removing acid compounds contained in a gaseous effluent using this solution. 2. An absorbent solution as claimed in claim 1 , comprising between 5 wt. % and 95 wt. % of amine mixture claim 1 , preferably between 10 wt. % and 90 wt. % of amine mixture claim 1 , and between 5 wt. % and 95 wt. % of water claim 1 , preferably between 10 wt. % and 90 wt. % of water.3. An absorbent solution as claimed in claim 1 , wherein the mass concentration ratio of 1 claim 1 ,2-bis-(2-dimethylaminoethoxy)-ethane to 2-[2-(2-dimethylaminoethoxy)-ethoxy]-ethanol ranges between 0.25 and 10 claim 1 , preferably between 0.5 and 2.4. An absorbent solution as claimed in claim 1 , further comprising between 5 wt. % and 50 wt. % of at least one additional amine claim 1 , said additional amine being either a tertiary amine or a secondary amine having two secondary carbons at nitrogen alpha position or at least one tertiary carbon at nitrogen alpha position.5. An absorbent solution as claimed in claim 4 , wherein said additional amine is a tertiary amine selected from among the group made up of:N-methyldiethanolamine,triethanolamine,diethylmonoethanolamine,dimethylmonoethanolamine,ethyldiethanolamine,2-(2-dimethylaminoethoxy)-ethanol,dimethylethylamine,dimethylethoxyethylamine,bis(dimethylaminoethyl)ether, andtetramethylethylenediamine.6. An absorbent solution as claimed in claim 1 , additionally comprise a non-zero amount less than 30 wt. % of at least one primary amine or secondary amine.7. An absorbent solution as claimed in claim 6 , wherein said primary or secondary amine is selected from among the group made up of:monoethanolamine,diethanolamine,N- ...

Method for eliminating acidic compounds from a gaseous effluent using an absorbent solution made from dihydroxyalkylamines having a severe steric encumbrance of the nitrogen atom

The method for eliminating acidic compounds contained in a gaseous effluent consists of placing into contact, in column C 1 , a gaseous effluent 1 with an absorbent solution 4 comprising an aqueous solution of one or a plurality of dihydroxyalkylamines having one of the formulas (I) and (II).

ACID COMPONENT REMOVAL DEVICE, ACID COMPONENT REMOVAL METHOD, AND ACID GAS REMOVAL DEVICE

An acid component removal device for removing an acid component from an acid gas absorbent containing an amine, comprising: 1. An acid component removal device for removing an acid component from an acid gas absorbent containing an amine , comprising:an anode;a cathode; andan electrodialysis structure having four compartments formed by arranging an first membrane which is either an anion exchange membrane or a cation exchange membrane, a second membrane which is a bipolar membrane, and a third membrane which is either an anion exchange membrane or a cation exchange membrane and which is the other of the first membrane, in this order, from the anode end to the cathode end between the anode and the cathode, with a space each between the membranes.2. The acid component removal device according to claim 1 ,wherein the first membrane is the anion exchange membrane, and the third membrane is the cation exchange membrane;wherein a first compartment formed on the anode side of the first membrane is an acid recovery compartment for recovering the acid component removed from the acid gas absorbent;wherein a second compartment formed between the first membrane and the second membrane is an absorbent purification compartment for removing the acid component from the acid gas absorbent;wherein a third compartment formed between the second membrane and the third membrane is an amine removal compartment for removing the amine component from an acid recovery liquid for recovering the acid component from the acid gas absorbent; andwherein a fourth compartment formed on the cathode side of the third membrane is an amine recovery compartment for recovering the amine component removed from the acid recovery liquid.3. The acid component removal device according to claim 1 ,wherein the first membrane is the cation exchange membrane, and the third membrane is the anion exchange membrane;wherein a first compartment formed on the anode side of the first membrane is an amine removal ...

CO2 MASS TRANSFER ENHANCEMENT OF AQUEOUS AMINE SOLVENTS BY PARTICLE ADDITIVES

The present invention relates to methods for improving carbon capture by providing particles within an amine solvent. The particles provide for increased turbulence at the interface between the counter-flowing gas and solvent, which allows for increased amine and carbamate salt diffusion between the liquid film and bulk. 1. A method for increasing carbon capture from a gas comprising contacting the gas with a biphasic scrubbing solution , wherein the biphasic scrubbing solution comprises an amine solvent with particles suspended therein , wherein the particles have a width of less than about 500 microns.2. The method of claim 1 , wherein the particles are hydrophobic.3. The method of claim 1 , wherein the particles comprise activated carbon particles.4. The method of claim 3 , wherein the activated carbon particles are functionalized to increase positive zeta potential.5. The method of claim 4 , wherein the activated carbon particles are functionalized by oxidation.6. The method of claim 4 , wherein the activated carbon particles are functionalized by an appended with a functional group selected from the group consisting of an alcohol claim 4 , a primary amine claim 4 , a tertiary amine claim 4 , and an amino silane.7. The method of claim 1 , wherein the particles have a width of between about 0.1 and 500 microns.8. The method of claim 1 , wherein the particles have a width of less than 100 nanometers.9. The method of claim 1 , wherein the amine solvent is selected from the group consisting of monoethanolamine (MEA) claim 1 , hexanediamine (HDA) claim 1 , N claim 1 ,N-Bis(2-hydroxyethyl)methyl-amine (MDEA) claim 1 , piperazine (PZ) and 2-amino-2-methyl propanol (AMP).10. The method of claim 1 , wherein the particles comprise between about 0.5 to 2.5 percent by weight of the biphasic scrubbing solution.11. The method of claim 1 , wherein the amine solvent comprises an amine dissolved in water claim 1 , wherein the amine comprises between about 15 to about 50 weight ...

Sweetening of natural gas

An exemplary embodiment can be a process for sweetening natural gas to liquefied natural gas specifications. The process can include providing a membrane contactor having a lumen side and a shell side. A feed natural gas is introduced to the lumen side of the membrane contactor. An absorption solvent is introduced to the shell side of the membrane contactor. CO 2 and H 2 S are removed with the absorption solvent from the feed natural gas resulting in a sweetened natural gas containing less than 50 ppmv CO 2 and less than 4 ppmv H 2 S. Corresponding or associated systems for such sweetening of natural gas are also provided.

HYDROGEN SULFIDE SCAVENGERS

Disclosed herein are scavenging compounds and compositions useful in applications relating to the production, transportation, storage, and separation of crude oil and natural gas. Also disclosed herein are methods of using the compounds and compositions as scavengers, particularly in applications relating to the production, transportation, storage, and separation of crude oil and natural gas 2. The composition of claim 1 , wherein x is 1 claim 1 , y is 1 claim 1 , z is 0 claim 1 , Rand Rare each alkylenyl claim 1 , and Ris hydrogen.4. The compound of claim 3 , wherein at least one of R claim 3 , R claim 3 , or Ris ethyl. The present disclosure relates generally to scavengers of sulfur-based species, and more particularly to alkanolamine formaldehyde compounds and compositions as scavengers of hydrogen sulfide and/or mercaptans.The removal of sulfur-based species from liquid or gaseous hydrocarbon streams is a problem that has long challenged many industries. Hydrogen sulfide is a huge problem in the oil industry, particularly in the drilling, production, transportation, storage, and processing of crude oil, as well as waste water associated with crude oil. The same problems exist in the natural gas industry.The presence of sulfur-containing compounds such as hydrogen sulfide can result in the deposition of sulfur containing salts, which can cause plugging and corrosion of transmission pipes, valves, regulators and other process equipment. Even flared natural gas needs to be treated to avoid acid rain generation due to SOformation. Also, in the manufactured gas industry or coke making industry, coal-gas emissions containing unacceptable levels of hydrogen sulfide are commonly produced from destructive distillation of bituminous coal.Since hydrogen sulfide has an offensive odor and natural gas containing it is called “sour” gas, treatments to lower hydrogen sulfide are termed “sweetening” processes. When a particular compound is used to remove or lower HS, it is ...

GAS SEPARATION BY VAPORIZED COMPOUND

An improved process for deacidizing a gaseous mixture with reduced overall energy costs is described. The process involves contacting the gaseous mixture with at least one of a vaporizing compound, a vaporized compound, a vaporizing solution of compound and a vaporized solution of compound, and forming a liquid or solid reaction product that can be easily separated from the gaseous mixture. 1. A method for deacidizing a gas stream comprising one or more acid gases , comprising:mixing a compound with the gas stream, wherein the compound reacts with the one or more acid gases in the gas stream to form a reaction product in a gas phase;causing the reaction product to precipitate from the gas phase in a form of a liquid or a solid; andcollecting the liquid or the solid reaction product,wherein the compound is in form of aerosol.2. The method of claim 1 , further comprising mixing the released compound with the gas stream.3. The method of claim 1 , wherein the one or more acid gases are selected from the group consisting of carbon dioxide (CO) claim 1 , sulfur dioxide (SO) claim 1 , sulfur trioxide (SO) claim 1 , hydrogen sulfide (HS) claim 1 , carbon oxysulfide (COS) claim 1 , carbon disulfide (CS) claim 1 , mercaptans (RSH) claim 1 , nitric oxide (NO) claim 1 , nitric dioxide (NO) claim 1 , fluorides claim 1 , HCl claim 1 , and HF.4. The method of claim 1 , wherein the compound comprises an amine selected from the group consisting of monoethanolamine claim 1 , diethanolamine claim 1 , triethanolamine claim 1 , ethanolamines claim 1 , isopropanolamines claim 1 , ethyleneamines claim 1 , alkyl alkanolamines claim 1 , methyldiethanolamine claim 1 , piperidine claim 1 , piperazine claim 1 , dibutylamine claim 1 , diisopropylamine claim 1 , and a mixture thereof.5. The method of claim 1 , wherein the aerosol is liquid droplets and/or solid particles.6. The method of claim 1 , wherein the aerosol are formed prior to mixing with the gas stream claim 1 , upon contacting the ...

Inner Surface Features for Co-Current Contactors

A co-current contactor for separating components in a fluid stream, the co-current contactor comprising a first inlet configured to receive the fluid stream proximate to a first end of the co-current contactor, a second inlet configured to receive a solvent proximate the first end of the co-current contactor, and a mass transfer section configured to receive the fluid stream and the solvent and to provide a mixed, two-phase flow, wherein the mass transfer section comprises a surface feature along an inner surface of the mass transfer section configured to reduce film flow along an inner wall of the mass transfer section, and wherein the surface feature comprises at least one of a hydrophobic surface, a superhydrophobic surface, a porous wall surface, and a nonlinear surface irregularity extending radially inward or radially outward along the inner surface of the mass transfer section.

METHOD OF DEVELOPMENT AND USE OF CATALYST-FUNCTIONALIZED CATALYTIC PARTICLES TO INCREASE THE MASS TRANSFER RATE OF SOLVENTS USED IN ACID GAS CLEANUP

The present invention relates to methods for improving carbon capture using entrained catalytic-particles within an amine solvent. The particles are functionalized and appended with a COhydration catalyst to enhance the kinetics of COhydration and improve overall mass transfer of COfrom an acid gas. 1: A biphasic scrubbing solution comprising an amine solvent with particles suspended therein , wherein the particles have a surface-appended carbonic anhydrase mimic catalyst and further wherein the particles have a width of less than about 500 microns.2: The biphasic scrubbing solution of claim 1 , wherein the particles are hydrophobic.3: The biphasic scrubbing solution of claim 1 , wherein the particles comprise activated carbon particles.4: The biphasic scrubbing solution of claim 1 , wherein the particles are functionalized to increase positive zeta potential.5: The biphasic scrubbing solution of claim 4 , wherein the particles are functionalized by oxidation.6: The biphasic scrubbing solution of claim 4 , wherein the particles are functionalized by an appended with a functional group selected from the group consisting of an alcohol claim 4 , a primary amine claim 4 , a tertiary amine claim 4 , and an amino silane.7: The biphasic scrubbing solution of claim 1 , wherein the surface-appended carbonic anhydrase mimic catalyst comprises a bidentate transition-metal ligand complex.11: The biphasic scrubbing solution of claim 1 , wherein the particles have a width of between about 0.1 and 500 microns.12: The biphasic scrubbing solution of claim 1 , wherein the particles have a width of less than 100 nanometers.13: The biphasic scrubbing solution of claim 1 , wherein the amine solvent is selected from the group consisting of monoethanolamine (MEA) claim 1 , 1-amino-2-propanol (1A2P) claim 1 , 3-amino-1-propanol claim 1 , 2-amino-1-propanol claim 1 , 2-amino-1-butanol claim 1 , 1-amino-2-butanol claim 1 , 3-amino-2-butanol claim 1 , 2-(methylamino)ethanonol (MAE) claim 1 , ...

Composite 3d-printed reactors for gas absorption, purification, and reaction

A composite material for gas capture, notably CO 2 capture and storage. The composite material includes a mixture of a solid or liquid reactive filler and a gas permeable polymer such that the reactive filler forms micron-scale domains in the polymer matrix.

CARBON DIOXIDE RECOVERY

Carbon dioxide is separated from flue gas by scrubbing the gas with an aqueous solution of ammonia and salt, and the COis therefore released from the solution by heating. The scrubbing step is performed with a co-current stream of an aqueous solution of ammonia and a salt. 1a. burning a fossil fuel to create a supply of flue gas containing carbon dioxide at a fossil site;b. continuously transporting the flue gas supply to the top of an absorption column packed with an aqueous solution of ammonia and a salt chosen from the group consisting of Na Cl and K Cl while replenishing the solution to the top of the column thereby scrubbing the flue gas by a downward co-current flow of the gas and the solution though the column at a temperature of between 15° C. and 50° C. thereby saturating the solution with carbon dioxide to produce a bicarbonate and ammonia chloride;c. thereafter heating the carbon dioxide enriched solution taken from the bottom of the column to release the absorbed carbon dioxide; andd. recycling the regenerated aqueous solution to the top of the column to replenish the solution for step (b).. A system for recovery carbon dioxide from a flue gas containing carbon dioxide comprising the steps of: This application is a continuation-in-part of U.S. patent application Ser. No. 15/600,043 filed May 19, 2017, which is a continuation-in part of U.S. patent application Ser. No. 14/798,827 filed Jul. 14, 2015, and hereby incorporates by reference the priority dates and contents of said applications in their entirety.The present invention relates to a process for the recovery of carbon dioxde from flue gases. The process uses an aqueous solution of salt and an amine to scrub the flue gas and absorb carbon dioxide. The resulting solution is regenerated by heating it in order to strip out pure carbon dioxide gas.There is a widespread concern for climate change characterized by environmental warming. Although the trend has been attributed to a number of causes, the ...

SYSTEM AND METHOD FOR REMOVING ACID GAS FROM A SOUR GAS STREAM

Embodiments of methods and associate system for removing acid gas from a sour gas stream are provided. The method includes (1) passing the sour gas stream in a counter-flow arrangement with an encapsulated phase change material and a lean amine based sorbent liquid configured to absorb the acid gas from the sour gas stream in an absorber; (2) separating the rich amine based sorbent liquid and the encapsulated phase change material; (3) passing the rich amine based sorbent liquid to an amine regenerator wherein the rich amine based sorbent liquid is heated to release the absorbed sour gas and regenerate the lean amine based sorbent liquid; and (4) passing the encapsulated phase change material and the regenerated lean amine based sorbent liquid through a cooler to reduce the temperature of the encapsulated phase change material such that the phase change material in the encapsulated phase change material solidifies. 1. A method of removing acid gas from a sour gas stream , the method comprising:providing a lean amine based sorbent liquid, wherein the lean amine based sorbent liquid is an amine based sorbent liquid configured to absorb the acid gas from the sour gas stream;providing an encapsulated phase change material, wherein the encapsulated phase change material is a phase change material which changes phase from solid to liquid upon heating encapsulated in a polymeric or inorganic shell with a melting point in excess of the melting point of the phase change material;(1) passing the sour gas stream in a counter-flow arrangement with the lean amine based sorbent liquid and the encapsulated phase change material in an absorber, wherein the lean amine based sorbent liquid absorbs the acid gas from the sour gas stream to form a rich amine based sorbent liquid and the encapsulated phase change material absorbs at least a portion of the energy freed by the heat of reaction from the conversion from the lean amine based sorbent liquid to the rich amine based sorbent ...

Regenerable solvent mixtures for acid-gas separation

A solvent system comprising a diluent and a nitrogenous base for the removal of CO 2 from mixed gas streams is provided. Also provided is a process for removing CO 2 from mixed gas streams using the disclosed solvent system. The solvent system may be utilized within a gas processing system.

Process for desorbing co2 from ion-rich mixture with micro-particles comprising biocatalysts

A process for desorbing CO 2 gas from an ion-rich aqueous mixture comprising bicarbonate and hydrogen ions, includes providing micro-particles in the ion-rich aqueous mixture; and feeding the ion-rich aqueous mixture into a desorption reactor; the micro-particles comprising a support material and biocatalysts supported and stabilized by the support material and being sized and provided in a concentration in the desorption reactor such that the micro-particles are carried with the ion-rich aqueous mixture to promote transformation of the bicarbonate and hydrogen ions into CO 2 gas and water, thereby producing a CO 2 gas stream and an ion-depleted solution.

Absorption agent and a method for selectively removing hydrogen sulphide

An absorbent for selective removal of hydrogen sulfide from a fluid stream comprising carbon dioxide and hydrogen sulfide, which comprises a) 10% to 70% by weight of at least one sterically hindered secondary amine having at least one ether group and/or at least one hydroxyl group in the molecule; b) at least one nonaqueous solvent having at least two functional groups selected from ether groups and hydroxyl groups in the molecule; and c) optionally a cosolvent; where the hydroxyl group density of the absorbent ρabs is in the range from 8.5 to 35 mol(OH)/kg. Also described is a process for selectively removing hydrogen sulfide from a fluid stream comprising carbon dioxide and hydrogen sulfide, wherein the fluid stream is contacted with the absorbent. The absorbent features good regeneration capacity and high cyclic acid gas capacity.

CONTINUOUSLY STIRRED TANK REACTOR ABSORBER AND FLASH TANK STRIPPER SYSTEM

The invention relates to a process for separation or purification of gaseous streams by removal of acid gases using a liquid amine solution. The process involves the steps of—contacting the gaseous stream with liquid lean amine solution in at least one continuous flow stirred-tank reactor (); —removing a sweetened gaseous flow from said continuous flow stirred-tank reactor (); —removing rich amine from said continuous flow stirred-tank reactor () for regeneration; —passing rich amine solution through at least one flash tank stripper ; —removing acid gases and vapour from said flash tank stripper ; —removing lean amine from said flash tank stripper for recirculation to said continuous flow stirred-tank reactor (). 113-. (canceled)14. A process for separation or purification of gaseous streams by removal of acid gases using a liquid amine solution , the process comprising the steps of:contacting the gaseous stream with liquid lean amine solution in at least one continuous flow stirred-tank reactor;removing a sweetened gaseous flow from said continuous flow stirred-tank reactor;removing rich amine from said continuous flow stirred-tank reactor for regeneration;passing rich amine solution through at least one flash tank stripper;removing acid gases and vapor from said flash tank stripper; andremoving lean amine from said flash tank stripper for recirculation to said continuous flow stirred-tank reactor.15. A process according to claim 14 , wherein the gaseous stream is contacted with liquid lean amine solution in multiple continuous flow stirred-tank reactors arranged in series.16. A process according to claim 14 , wherein the gaseous stream is contacted with liquid lean amine solution in at least one multiple continuous flow stirred-tank reactor and a column absorber arranged in series.17. A process according to claim 14 , wherein the gaseous stream is contacted with liquid lean amine solution in multiple continuous flow stirred-tank reactors arranged in parallel.18. A ...

SYSTEM AND PROCESS OF CAPTURING CARBON DIOXIDE FROM FLUE GASES

A system and a process for capturing Carbon Dioxide (CO) from flue gases are disclosed. The process comprises feeding a flue gas comprising COto at least one Rotary Packed Bed (RPB) absorber rotating circularly. A solvent may be provided through an inner radius of the RPB absorber. The solvent may move towards an outer radius of the RPB absorber. The solvent may react with the flue gas in a counter-current flow. The process further includes passing the flue gas through at least one of a water wash and an acid wash to remove traces of the solvent present in the flue gas. Finally, the solvent reacted with the COmay be thermally regenerated for re-utilizing the solvent back in the process. 1. A process of capturing Carbon Dioxide (CO) from flue gases , the process comprising:{'sub': '2', 'feeding a flue gas comprising COto at least one Rotary Packed Bed (RPB) absorber rotating circularly, wherein a solvent provided through an inner radius of the at least one RPB absorber moves towards an outer radius of the at least one RPB absorber, and wherein the solvent reacts with the flue gas in a counter-current flow.'}2. The process of claim 1 , wherein the process further comprises at least one of:passing the flue gas through one or both of a water wash and an acid wash to remove traces of the solvent present in the flue gas; and{'sub': '2', 'thermally regenerating the solvent reacted with the COfor re-utilizing the solvent in the process.'}3. The process of claim 2 , whereinone or both of the water wash and the acid wash are conducted on separate RPBs.4. The process of claim 1 , wherein a housing of the RPB or RPBs is mounted on a rotatable disk.5. The process of claim 1 , wherein feeding the flue gas comprising COto at least one RPB absorber rotating circularly comprises feeding the flue gas to two claim 1 , three claim 1 , four claim 1 , five or six RPB absorbers rotating circularly.6. The process of claim 5 , wherein the two claim 5 , three claim 5 , four claim 5 , five or ...

COMPOSITE 3D-PRINTED REACTORS FOR GAS ABSORPTION, PURIFICATION, AND REACTION

A composite material for gas capture, notably COcapture and storage. The composite material includes a mixture of a solid or liquid reactive filler and a gas-permeable polymer such that the reactive filler forms micron-scale domains in the polymer matrix. 1. A reactor for removing carbon dioxide from a gas containing the carbon dioxide , comprising:units of sorbent material;a gas-permeable polymer;a 3-D ink produced by mixing said units of sorbent material and said gas-permeable polymer;a surface;a 3-D print head that extrudes said 3-D ink onto said surface; anda controller that controls said 3-D print head to extrude said 3-D ink onto said surface to form the reactor.2. The reactor for removing carbon dioxide from a gas containing the carbon dioxide of wherein said units of sorbent material are particles of carbon dioxide stripping material.3. The reactor for removing carbon dioxide from a gas containing the carbon dioxide of wherein said units of sorbent material are solid particle precursors to liquid units of carbon dioxide stripping material.4. The reactor for removing carbon dioxide from a gas containing the carbon dioxide of wherein said units of sorbent material are particles of carbon dioxide stripping material encapsulated in capsules.5. The reactor for removing carbon dioxide from a gas containing the carbon dioxide of wherein said units of sorbent material are particles of carbon dioxide stripping material encapsulated in spherical capsules that have a gas-permeable polymer surface layer encapsulating said particles of carbon dioxide stripping material.6. The reactor for removing carbon dioxide from a gas containing the carbon dioxide of wherein said units of sorbent material are liquid units of carbon dioxide stripping material.7. The reactor for removing carbon dioxide from a gas containing the carbon dioxide of wherein said units of sorbent material are liquid droplets of carbon dioxide stripping material encapsulated in capsules.8. The reactor for ...

Method and apparatus for continuous removal of carbon dioxide

The present invention relates to a method for continuous removal of carbon dioxide, the method comprising the steps of: a) preparing an aqueous solution containing an amine-based compound and an acidic calcium compound; b) bringing a gas containing carbon dioxide to be treated into contact with the aqueous solution to prepare a calcium carbonate precipitate; and c) recovering the calcium carbonate and then adding a basic calcium compound to the residual aqueous solution, wherein after step c), step b) and step c) are repeatedly performed. The removal of carbon dioxide by the method of the present invention has advantages of requiring low energy and being capable of mineralizing and removing carbon dioxide at a fast rate without a separate time for induction.

ABSORBENT AND PROCESS FOR SELECTIVELY REMOVING HYDROGEN SULFIDE

An absorbent for the selective removal of hydrogen sulfide over carbon dioxide from a fluid stream, wherein the absorbent contains an aqueous solution, comprising an amine of formula (I) and/or an amine of formula (II) wherein U—V—W is CH—O—CHR, N—CO—CHRor N—CO—NR; U′—V′—W is C—O—CR; Ris independently C-C-alkyl; Ris selected from hydrogen and C-C-alkyl; Ris independently selected from hydrogen and C-C-alkyl; Ris independently selected from hydrogen and C-C-alkyl; Ris selected from hydrogen, C-C-alkyl, (C-C-alkoxy)-C-C-alkyl, and hydroxy-C-C-alkyl; and x is an integer from 1 to 10. The absorbent has a reduced tendency for phase separation at temperatures falling within the usual range of regeneration temperatures for the aqueous amine mixtures and a low volatility in aqueous solvents. 114.-. (canceled)16. The absorbent according to claim 15 , wherein the amine is an amine of formula (I).17. The absorbent according to claim 15 , wherein the amine is an amine of formula (II).18. The absorbent according to claim 15 , wherein the amine is selected from1-[2-(tert-butylamino)ethyl]pyrrolidin-2-one,1-[2-(isopropylamino)ethyl]pyrrolidin-2-one,N-(2-furylmethyl)-2-methyl-propan-2-amine,N-(2-furylmethyl)propan-2-amine,[5-[(tert-butylamino)methyl]-2-furyl]methanol,[5-[(isopropylamino)methyl]-2-furyl]methanol,N-[[5-(methoxymethyl)-2-furyl]methyl]-2-methyl-propan-2-amine,N-[[5-(methoxymethyl)-2-furyl]methyl]propan-2-amine,2-methyl-N-(tetrahydrofuran-2-ylmethyl)propan-2-amine,N-(tetrahydrofuran-2-ylmethyl)propan-2-amine,[5-[(tert-butylamino)methyl]tetrahydrofuran-2-yl]methanol,[5-[(isopropylamino)methyl]tetrahydrofuran-2-yl]methanol,N-[[5-(methoxymethyl)tetrahydrofuran-2-yl]methyl]-2-methyl-propan-2-amine,N-[[5-(methoxymethyl)tetrahydrofuran-2-yl]methyl]propan-2-amine,1-[2-(tert-butylamino)ethyl]imidazolidin-2-one, and1-[2-(isopropylamino)ethyl]imidazolidin-2-one.19. The absorbent according to claim 18 , wherein the amine is selected from1-[2-(tert-butylamino)ethyl]pyrrolidin-2-one ...

Absorbent liquid for co2 and/or h2s, and apparatus and method using same

An absorbent liquid which absorbs at least one of CO2 and H2S from a gas, including a secondary linear monoamine; a tertiary linear monoamine or a sterically hindered primary monoamine; and a secondary cyclic diamine, wherein a concentration of each of the secondary linear monoamine, the tertiary linear monoamine or the sterically hindered primary monoamine; and the secondary cyclic diamine is less than 30% by weight.

Ethylene Recovery by Absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene. 1. A process comprising:contacting ethylene and a polymerization catalyst in a first loop slurry reactor and in a second loop slurry reactor connected in series with the first loop slurry reactor, under suitable reaction conditions to yield a polymerization product stream flowing from the second loop slurry reactor, wherein the polymerization product stream comprises a bimodal polymer;separating a gas stream from the polymerization product stream, wherein the gas stream comprises unreacted ethylene and ethane;separating, using an absorption solvent system at a temperature in a range of from about 40° F. to about 110° F., at least one gaseous component from the gas stream to form a recycle stream comprising unreacted ethylene and a waste stream comprising ethane; andrecycling the unreacted ethylene of the recycle stream to the first loop slurry reactor, the second loop slurry reactor, or both the first loop slurry reactor and the second loop slurry reactor.2. The process of claim 1 , wherein the bimodal polymer comprises a high molecular weight polymer and a low molecular weight polymer.3. The process of claim 2 , wherein the high molecular weight polymer has a low density claim 2 , and wherein the low molecular weight polymer has a high density.4. The process of claim 1 , ...

MEMBRANE CONTACTOR

A membrane contactor for separating components from a feed gas stream comprises a housing, a feed gas inlet for receiving the feed gas stream at a first pressure, and a liquid inlet or receiving a stream of liquid at a second pressure, the liquid containing an absorbent for reacting components of the gas stream and a slip gas outlet. The contactor also includes a plurality of fibers with pore channels in contact with the feed gas incoming from the gas inlet on a first side, and in contact with liquid incoming from the liquid inlet on a second side, producing a gas-liquid interface at the pore channels. Liquid is prevented from wetting the pore channels by maintaining the first pressure of the gas stream higher than the liquid stream, and a portion of the gas stream bubbles through as slip gas into the liquid stream due to the elevated pressure. 1. A membrane contactor for separating components from a feed gas stream comprising:a housing;a feed gas inlet port coupled to the housing for receiving the feed gas stream at a first pressure;a liquid inlet port in the housing for receiving a stream of liquid at a second pressure, the liquid containing an absorbent for reacting with components of the gas stream;a plurality of membrane fibers with pore channels, the plurality of fibers in contact with the feed gas incoming from the gas inlet on a first side, and in contact with liquid incoming from the liquid inlet on a second side, producing a gas-liquid interface at the pore channels; anda slip gas outlet in the housing;wherein the liquid is prevented from wetting the pore channels by maintaining the first pressure of the gas stream higher than the pressure of the liquid stream, andwherein a portion of the gas stream bubbles through as slip gas into the liquid stream due to the elevated pressure.2. The membrane contactor or claim 1 , further comprising a feed gas outlet port and a liquid outlet port.3. The membrane contactor of claim 2 , wherein the housing of the contactor ...

AN AQUEOUS CO2 ABSORBENT COMPRISING 2-AMINO-2-METHYL-1-PROPANOL AND 3-AMINOPROPANOL OR 2-AMINO-2-METHYL-1-PROPANOL AND 4-AMINOBUTANOL

An aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1-propanol (AMP) and 3-aminopropanol (AP), or AMP and 4-aminobutanol (AB), is described. A method for capturing CO2 from a CO2 containing gas using the mentioned absorbent, and the use of a combination of AMP and AP, or a combination of AMP and AB are also described. 1. An aqueous CO2 absorbent comprising:2-amino-2-methyl-1-propanol (AMP); and 3-aminopropanol (AP); and', '4 aminobutanol (AB)., 'one of2. The aqueous CO2 absorbent according to claim 1 , wherein the concentration of AMP is from 10 to 35% by weight and the concentration of AP or AB is from 10 to 40% by weight.3. The aqueous CO2 absorbent according to claim 2 , wherein the concentration of AMP is at least 10% by weight.4. The aqueous CO2 absorbent according to claim 2 , wherein the concentration of AP or AB is at least 10% by weight.5. The aqueous CO2 absorbent according to claim 1 , wherein the absorbent additionally comprises any conventional additive.6. The aqueous CO2 absorbent according to claim 1 , wherein the absorbent comprises a combination of AMP and AP.7. A method for capturing CO2 from a CO2 containing gas claim 1 , where the CO2 containing gas is brought in countercurrent flow to a CO2 absorbent in an absorber to give a CO2 depleted gas that is released into the surroundings claim 1 , and a CO2 rich absorbent that is collected in the bottom of the absorber claim 1 , regenerated and recycled into the absorber claim 1 , wherein the CO2 absorbent is an aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1-propanol (AMP) and 3-aminopropanol (AP) claim 1 , or AMP and 4-aminobutanol (AB).8. (canceled)9. (canceled)10. The aqueous CO2 absorbent according to claim 3 , wherein the concentration of AMP is at least 20% by weight.11. The aqueous CO2 absorbent according to claim 10 , wherein the concentration of AMP is at least 25% by weight.12. The aqueous CO2 absorbent according to claim 11 , wherein the concentration ...

1-Amino-2-Methyl-2-Propanol Derivatives

Amines and amine derivatives that improve the buffering range, and/or reduce the chelation and other negative interactions of the buffer and the system to be buffered. The reaction of amines or polyamines with various molecules to form polyamines with differing pKa's extend the buffering range resulting in polyamines that have the same pKa yields a greater buffering capacity. Derivatives that result in zwitterionic buffers improve yield by allowing a greater range of stability. 2. The gas scrubbing amine of where G=—CH.3. The gas scrubbing amine of where G=—H.5. The pigment dispersant and its salts of where x=1 claim 4 , G=—CHand J=—H.6. The pigment dispersant and its salts of where x=1 claim 4 , G=CH and J=—H.7. The pigment dispersant and its salts of where x=0 and J=—H.8. The pigment dispersant and its salts of where x=1 claim 4 , G=—CHand J=—CH.9. The pigment dispersant and its salts of where x=1 claim 4 , G=—H and J=—CH.10. The pigment dispersant and its salts of where x=1 claim 4 , G=—CHand J=—(CHCHO)—(CH2CH(CH3)O)H claim 4 , —(CH2C(CH3)O)H. n claim 4 , m and q are integers greater than zero.11. The pigment dispersant and its salts of where x=1 claim 4 , G=—H and J=—(CHCHO)—(CH2CH(CH3)O)H claim 4 , —(CH2C(CH3)O)H. n claim 4 , m and q are integers greater than zero.12. The pigment dispersant and its salts of where x=0 claim 4 , and J=—(CHCHO)—(CH2CH(CH3)O)H claim 4 , —(CH2C(CH3)O)H. n claim 4 , m and q are integers greater than zero.14. The pigment dispersant and its salts of wherein claim 13 , G=—H.15. The pigment dispersant and its salts of wherein claim 13 , G=—CH3.16. The pigment dispersant and its salts of wherein claim 13 , G=—CH2CH3.17. The pigment dispersant and its salts of wherein claim 13 , G=—OH.18. The pigment dispersant and its salts of wherein claim 13 , J=—H.19. The pigment dispersant and its salts of wherein claim 13 , G=—H and J=—H.20. The pigment dispersant and its salts of wherein claim 13 , G=—CH3 and J=—H. This application is a divisional ...

System and method for removing acid gas from a sour gas stream

Embodiments of methods and associate system for removing acid gas from a sour gas stream are provided. The method includes (1) passing the sour gas stream in a counter-flow arrangement with an encapsulated phase change material and a lean amine based sorbent liquid configured to absorb the acid gas from the sour gas stream in an absorber; (2) separating the rich amine based sorbent liquid and the encapsulated phase change material; (3) passing the rich amine based sorbent liquid to an amine regenerator wherein the rich amine based sorbent liquid is heated to release the absorbed sour gas and regenerate the lean amine based sorbent liquid; and (4) passing the encapsulated phase change material and the regenerated lean amine based sorbent liquid through a cooler to reduce the temperature of the encapsulated phase change material such that the phase change material in the encapsulated phase change material solidifies.

PROCESS AND APPARATUS FOR SEPARATING ENTRAINED AMINES FROM A GAS STREAM

This disclosure relates to a process for removing acid gases from a gas stream enriched in acid gases, wherein: (a) the gas stream enriched in acid gases is contacted in an absorption zone with an absorption medium, wherein the absorption medium is an aqueous medium comprising an amine, to form a gas stream depleted in acid gases which comprises an entrained amine and an absorption medium enriched in acid gases; and (b) treating the gas stream depleted in acid gases which comprises an entrained amine in a first scrubbing zone with a first scrubbing medium, wherein the first scrubbing medium is an aqueous medium comprising an amine, the amount of amine comprised by the scrubbing medium being about 0.1 to about 50.0 wt. %, wherein the aqueous medium is saturated with carbon dioxide such that at least 75 wt. % of the amine, based on the total amount of amine comprised by the aqueous medium, is in its carbamate or carbonate form, to form a gas stream depleted in acid gases and in amine and a first scrubbing medium enriched in amine. 1. A process for removing acid gases from a gas stream enriched in acid gases , wherein:(a) the gas stream enriched in acid gases is contacted in an absorption zone with an absorption medium, wherein the absorption medium is an aqueous medium comprising an amine, to form a gas stream depleted in acid gases which comprises an entrained amine and an absorption medium enriched in acid gases; and(b) treating the gas stream depleted in acid gases which comprises an entrained amine in a first scrubbing zone with a first scrubbing medium, wherein the first scrubbing medium is an aqueous medium comprising an amine, the amount of amine comprised by the scrubbing medium being about 0.1 to about 50.0 wt. %, wherein the aqueous medium is saturated with carbon dioxide such that at least 75 wt. % of the amine, based on the total amount of amine comprised by the aqueous medium, is in its carbamate or carbonate form, to form a gas stream depleted in acid ...

METHODS AND APPARATUSES FOR RECOVERING CO2

The present disclosure provides methods and apparatuses of recovering COfrom a gas stream. The methods regenerate COwith high regeneration efficiencies, thereby lowering the overall energy cost for COcapture. 1. A method of recovering carbon dioxide from a gas stream , the method comprising:a. contacting a gas stream comprising carbon dioxide with an absorption liquid;b. contacting the absorption liquid with a nanoparticle, thereby forming a nanofluid; andc. photothermally releasing carbon dioxide from the nanofluid.2. The method of claim 1 , wherein the gas stream comprises flue gas.3. The method of claim 2 , wherein the flue gas is from coal combustions.4. The method of claim 1 , wherein the absorption liquid comprises a solvent selected from water claim 1 , methyl-t-butyl ether claim 1 , tetrahydrofuran claim 1 , ethyl acetate claim 1 , 2-propanol claim 1 , dimethoxyethane claim 1 , 2-butanol claim 1 , 3-pentanol claim 1 , 1-butanol claim 1 , dimethylformamide claim 1 , diglyme claim 1 , 1-heptanol claim 1 , 1-octanol claim 1 , ethylene glycol claim 1 , NMP claim 1 , ethyl benzoate claim 1 , diethyethylene glycol claim 1 , di-n-butylphthalate or combinations thereof.5. The method of claim 1 , wherein the absorption liquid comprises an amine.6. The method of claim 5 , wherein the amine is monoethanolamine claim 5 , diethanolamine or methyldiethanolamine claim 5 , piperidine claim 5 , piperazine claim 5 , piperadone claim 5 , piperidinol claim 5 , diglycolamine claim 5 , or diisopropanolamine.7. The method of claim 1 , wherein the absorption liquid comprises a CObinding organic liquid.8. The method of claim 7 , wherein the CObinding organic liquid comprises a base and an alcohol.9. The method of claim 8 , wherein the base is an amine claim 8 , amidine claim 8 , imidazole compound or a guanidine compound.10. The method of claim 9 , wherein the CObinding organic liquid comprises 1 claim 9 ,1 claim 9 ,3 claim 9 ,3-tetramethylguanidine or Barton's base.11. The method ...

Process For Selectively Removing Hydrogen Sulphide From Gaseous Mixtures And Use Of A Thioalkanol For Selectively Removing Hydrogen Sulphide

A process for selectively removing hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide HS and carbon dioxide CO, includes a step of contacting the gaseous mixture with an absorbent solution including at least one amine, water, and at least one Cto Cthioalkanol. A use of the absorbent solution for selectively removing hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide and carbon dioxide, is disclosed. Disclosed is a use of at least one Cto Cthioalkanol as an additive in an absorbent solution including at least one amine, and water, for increasing the selectivity of the absorbent solution for the removal of hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide and carbon dioxide. 1. A process for selectively removing hydrogen sulphide HS relative to carbon dioxide COfrom a gaseous mixture containing at least hydrogen sulphide HS and carbon dioxide CO , the process comprising contacting the gaseous mixture with an absorbent solution comprising at least one amine , water , and at least one Cto Cthioalkanol , wherein water is from 35% to 45% by weight.2. The process according to claim 1 , wherein the gaseous mixture includes claim 1 , besides HS and CO claim 1 , at least one other sulphur-containing compound preferably selected from mercaptans and carbonyl sulphide COS.3. The process according to claim 1 , wherein the hydrogen sulphide content of the gaseous mixture to be treated is comprised between 30 ppm by volume and 40% by volume claim 1 , and the process further comprises claim 1 , after the contacting step claim 1 , lowering this content to 1 ppm by volume.4. The process according to claim 1 , wherein the COcontent of the gaseous mixture to be treated is comprised between 0.5% by volume and 80% by volume claim 1 , preferably between 1% by volume and 50% by volume.5. The process according to claim 4 , ...

PORTABLE CARBON DIOXIDE ABSORPTION SYSTEM

Various embodiments of a portable carbon dioxide (CO2) absorption device that may remove excess CO2 from a closed environment are disclosed herein. The absorption device is reusable and configured for many environments. 1. A portable carbon dioxide absorption machine comprising:an exterior housing defining an inlet and an outlet;a blower in fluid communication with the outlet and with an expansion manifold, wherein the blower is disposed within the housing, pulls air from the expansion manifold, and pushes air from the exterior housing through the outlet;the expansion manifold comprising a manifold housing defining an expansion chamber; the expansion chamber, disposed within the housing, filters and reduces a velocity of air pulled by the blower;a carbon-dioxide absorbing device disposed within the housing, the carbon-dioxide absorbing device in fluid communication with the inlet and the expansion manifold, wherein the carbon-dioxide absorbing device absorbs carbon-dioxide from the air entering the inlet and,a power supply disposed within the housing, wherein the power supply is in electrical communication with the blower.2. The portable carbon dioxide absorption machine of claim 1 , wherein the blower generates a negative pressure to draw air external to the exterior housing through the carbon-dioxide absorbing machine and the expansion manifold.3. The portable carbon dioxide absorption machine of claim 1 , wherein the inlet has an inlet width greater than an outlet width of the outlet.4. The portable carbon dioxide absorption machine of claim 1 , wherein an exterior opening of the outlet comprises at least one of a screen coupled to an inner diameter of the exterior opening of the outlet claim 1 , a mesh coupled the inner diameter of the exterior opening of the outlet claim 1 , or a plurality of holes defined by the external housing.5. The portable carbon dioxide absorption machine of claim 1 , wherein the carbon dioxide absorbing device comprises a carbon dioxide ...

APPARATUS AND METHOD FOR ABSORBING A COMPONENT FROM A GAS MIXTURE USING ROTATING PACKED BED UNIT

Provided herein is a method for absorbing COfrom a gas mixture. The method includes using an apparatus comprised of a first RPB unit and a second RPB unit. The first RPB unit and the second RPB unit are arranged to absorb COin a first gas stream and a second gas stream, respectively. A liquid CO-absorbent is supplied sequentially passing through the first RPB unit and the second RPB unit to absorb COin the first gas stream and the second gas stream. The liquid CO-absorbent is regenerated to produce a regenerated CO-absorbent. The regenerated CO-absorbent is transported to the first RPB unit. 1. A method for absorbing COfrom a gas mixture , comprising:{'sub': 2', '2', '2', '2', '2', '2, 'providing or receiving a first rotating packed bed (RPB) unit comprising a first RPB, a first gas inlet, a first gas outlet, a first CO-absorbent inlet, and a first CO-absorbent outlet, and a second RPB unit comprising a second RPB, a second gas inlet, a second gas outlet, a second CO-absorbent inlet and a second CO-absorbent outlet, wherein the first CO-absorbent outlet of the first RPB unit is connected to the second CO-absorbent inlet of the second RPB unit;'}{'sub': 2', '2, 'transporting a first gas stream containing COfrom the first gas inlet through the first RPB to the first gas outlet, wherein the first gas stream has a first COvolumetric percentage ranged from 1 vol % to 30 vol %;'}{'sub': 2', '2, 'transporting a second gas stream containing COfrom the second gas inlet through the second RPB to the second gas outlet, wherein the second gas stream has a second COvolumetric percentage ranged from 1 vol % to 30 vol %;'}{'sub': 2', '2', '2', '2', '2', '2', '2', '2, 'transporting a CO-absorbent from the first CO-absorbent inlet through the first RPB, the first CO-absorbent outlet, the second CO-absorbent inlet and the second RPB to the second CO-absorbent outlet in sequence such that the CO-absorbent absorbs the COin the first and the second gas streams, thereby generating a CO- ...

METHOD AND SYSTEM FOR FILTERING FORMALDEHYDE FROM INOOR AIR

Embodiments of the present disclosure are directed to systems and methods for removing formaldehyde from indoor air. Some embodiments include flowing an indoor airflow over and/or through a solid supported amine filtering medium, such that, at least a portion of formaldehyde entrained in the indoor airflow is removed therefrom. Some other embodiments include systems having one or more fans for providing velocity to one and/or another airflows (e.g., airflows to/from a formaldehyde filter). 1. A method for removing formaldehyde from indoor air comprising flowing an indoor airflow over and/or through a solid supported amine filtering medium , such that , at least a portion of formaldehyde entrained in the indoor airflow is removed therefrom by the amine filtering medium.2. The method of claim 1 , wherein the filtering medium comprises a material formed from the combination of liquid amine with one or more granular solid support materials selected from the group consisting of: silica claim 1 , clay claim 1 , alumina claim 1 , carbon claim 1 , polymer claim 1 , fiber claim 1 , or combinations thereof.3. The method of claim 1 , wherein the amine is selected from the group consisting of: 2 claim 1 ,4-dinitrophenylhydrazine claim 1 , monoethanolamine claim 1 , polyethylenimine claim 1 , tetraethylenepentamine claim 1 , pentaethyleneheptamine claim 1 , and diethanolamine.4. The method of claim 1 , wherein the filtering medium comprises granular particles ranging in size from about 0.1 mm diameter to about 3 mm diameter.5. The method of claim 4 , wherein the granular particles of the filtering medium are arranged in one or more filter sheets so as to allow interaction between the formaldehyde in the indoor air flowing through the medium and amines in the medium.6. The method of claim 1 , wherein the face velocity of the airflow impinging the filtering medium is between about 10 cm/s to about 500 cm/s.7. The method of claim 1 , wherein the face velocity of the airflow ...

EMISSIONS REDUCTION FOR CO2 CAPTURE

Systems and processes for reducing carbon capture emissions are described. The process involves introducing a radical species into a decarbonized combustion gas. The radical species react with residual amines or unwanted compounds in the decarbonized combustion gas, thus reducing the concentration of residual amines or unwanted compounds in the exhaust gas. The system includes a carbon capture absorber with non-thermal plasma generator configured to provide radical species reducing the concentration of residual amines or unwanted compounds in the exhaust combustion gas. 1. A method for reducing unwanted emissions from a carbon capture process , comprising:receiving a combustion gas into a pathway within an absorber, wherein the absorber has an inlet for the combustion gas and an outlet for an exhaust gas that define the pathway, and wherein the absorber comprises an amine solvent configured to remove carbon dioxide from the combustion gas to produce a decarbonized combustion gas and a rich amine solvent;receiving the amine solvent at a first point of the absorber, wherein the absorber is further configured to produce the decarbonized combustion gas at or downstream of the first point, wherein the decarbonized combustion gas comprises a plurality of unwanted compounds at a first concentration;providing a plurality of radical species at a second point of the absorber using a non-thermal plasma generator, wherein the non-thermal plasma generator is coupled with the absorber;receiving, by the absorber, the plurality of radical species into the pathway at the second point;reacting at least a subset of the radical species with at least a subset of the plurality of unwanted compounds; andreducing the first concentration of the plurality of unwanted compounds in the decarbonized combustion gas to a second concentration in the exhaust gas based on the reacting,wherein the second point is between the first point and the outlet.2. The method of claim 1 , wherein the second ...

Methods and systems for improving the energy efficiency of carbon dioxide capture

A system for carbon dioxide capture from a gas mixture comprises a lean solvent comprising 3-amino-1-propanol (AP), 2-dimethylamino-2-methyl-1-propanol (DMAMP), and water; an absorber containing at least a portion of the lean solvent, wherein the absorber is configured to receive the lean solvent and a gaseous stream comprising carbon dioxide, contact the lean solvent with the gaseous stream, and produce a rich solvent stream and a gaseous stream depleted in carbon dioxide; a stripper, wherein the stripper is configured to receive the rich solvent stream; a cross-exchanger fluidly coupled to a rich solvent outlet on the absorber and a rich solvent inlet on the stripper; a reboiler fluidly coupled to a lower portion of the stripper; and a condenser fluidly coupled to a vapor outlet of the stripper.

1-Amino-2-Methyl-2-Propanol Derivatives

Amines and amine derivatives that improve the buffering range, and/or reduce the chelation and other negative interactions of the buffer and the system to be buffered. The reaction of amines or polyamines with various molecules to form polyamines with differing pKa's extend the buffering range resulting in polyamines that have the same pKa yields a greater buffering capacity. Derivatives that result in zwitterionic buffers improve yield by allowing a greater range of stability. 19-. (canceled)11. The gas scrubbing amine of where G=—CH.12. The gas scrubbing amine of where G=—H.14. The mining collector and its salts of where A=—H.15. The mining collector and its salts of where A=—CS2H.17. The pigment dispersant and its salts of where x=1 claim 16 , G=—CHand J=—H.18. The pigment dispersant and its salts of where x=1 claim 16 , G=CH and J=—H.19. The pigment dispersant and its salts of where x=0 and J=—H.20. The pigment dispersant and its salts of where x=1 claim 16 , G=—CHand J=—CH.21. The pigment dispersant and its salts of where x=1 claim 16 , G=—H and J=—CH.22. The pigment dispersant and its salts of where x=1 claim 16 , G=—CHand J=—(CHCHO)—(CH2CH(CH3)O)H claim 16 , —(CH2C(CH3)O)H. n claim 16 , m and q are integers greater than zero.23. The pigment dispersant and its salts of where x=1 claim 16 , G=—H and J=—(CHCHO)—(CH2CH(CH3)O)H claim 16 , —(CH2C(CH3)O)H. n claim 16 , m and q are integers greater than zero.24. The pigment dispersant and its salts of where x=0 claim 16 , and J=—(CHCHO)—(CH2CH(CH3)O)H claim 16 , —(CH2C(CH3)O)H. n claim 16 , m and q are integers greater than zero. This application is related to, and claims priority from U.S. Provisional Patent application No. 62/507,497 filed May 17, 2017. Application 62/507,497 is hereby incorporated by reference in its entirety.The present invention relates generally to the field of amines and more particularly to a classes of amino zwitterions.Amines are extremely useful compounds in the buffering of biological ...

Compositions and methods for carbon dioxide capture

An aqueous solvent composition is provided, comprising a nucleophilic component having one or more sterically unhindered primary or secondary amine moieties, a Brønsted base component having one or more basic nitrogen moieties, a water-soluble organic solvent, and water. A biphasic composition is provided, comprising one or more carbamate compounds, one or more conjugate acids of Brønsted base, a water-soluble organic solvent, and water. A biphasic CO 2 absorption process is also provided, utilizing the biphasic solvent composition.

SYSTEM FOR TIME-SHIFTING POST-COMBUSTION CO2 CAPTURE

An undesirable constituent gas from the flue gas stream of a fossil fuel-fired power plant, especially carbon dioxide, CO, which is a potent greenhouse gas, is captured in a recirculating solvent-based absorption operation such as with an amine-based solvent. The solvent is exposed to flue gases for capture of the undesirable constituent, then heated to extract captured undesirable constituent for disposal, also regenerating the gas-rich solvent to gas-lean solvent for re-use. Absorption is continuous and uses the lean solvent at a rate proportional to the combustion rate. Solvent regeneration and its associated power loading are deferred and time-shifted to periods when the plant is operating below its peak power level. At high or peak power levels, rich solvent from absorption is accumulated in a storage vessel. At off-peak times, rich solvent accumulated in the storage vessel is regenerated together with rich solvent from concurrent absorption. Deferring regeneration to off peak (low price) times improves the peak (high price) output power level of which the plant is capable, and considerably increases revenue. 1. A method for reducing emission of a constituent in flue gases generated by an electric power plant that combusts fuel and has a cyclic variation in power demand level , comprising:operating the power plant by producing energy from combustion of the fuel;exposing lean solvent to flue gases that result from the combustion, the lean solvent absorbing from the flue gases a portion of the constituent, thereby producing rich solvent by absorption of the portion of the constituent, and wherein the rich solvent is effective upon application of energy to the rich solvent to release the gas portion and to regenerate the solvent in lean condition;collecting the rich solvent and applying to the rich solvent a portion of the energy that is produced by said combustion in the power plant, thereby releasing the gas portion and regenerating lean solvent for re-use; ...

METHODS AND SYSTEMS FOR IMPROVING THE ENERGY EFFICIENCY OF CARBON DIOXIDE CAPTURE

A system for carbon dioxide capture from a gas mixture comprises a lean solvent comprising 3-amino-1-propanol (AP), 2-dimethylamino-2-methyl-1-propanol (DMAMP), and water; an absorber containing at least a portion of the lean solvent, wherein the absorber is configured to receive the lean solvent and a gaseous stream comprising carbon dioxide, contact the lean solvent with the gaseous stream, and produce a rich solvent stream and a gaseous stream depleted in carbon dioxide; a stripper, wherein the stripper is configured to receive the rich solvent stream; a cross-exchanger fluidly coupled to a rich solvent outlet on the absorber and a rich solvent inlet on the stripper; a reboiler fluidly coupled to a lower portion of the stripper; and a condenser fluidly coupled to a vapor outlet of the stripper. 1. A solvent for capture of carbon dioxide from a gas mixture , comprising:3-amino-1-propanol (AP), in a concentration ranging from 5 wt % to 45 wt %;2-dimethylamino-2-methyl-1-propanol (DMAMP), where a mass ratio of DMAMP to AP is between about 1:11 and 5:1; andwater.2. The solvent of claim 1 , wherein the concentration of DMAMP is between approximately 5 wt % and 55 wt %.3. The solvent of claim 1 , wherein the concentration of AP is approximately 10 wt % and the concentration of DMAMP is approximately 45 wt %.4. The solvent of claim 1 , wherein the ratio of AP to DMAMP is approximately 1:10.5. The solvent of claim 1 , wherein the ratio of AP to DMAMP is approximately 1:5.6. The solvent of claim 1 , wherein the ratio of AP to DMAMP is approximately 1:2.7. The solvent of claim 1 , wherein the ratio of AP to DMAMP is approximately 1:1.8. The solvent of claim 1 , wherein the ratio of AP to DMAMP is approximately 3:1.9. A method for capturing carbon dioxide from a gas mixture comprising:contacting a gaseous stream comprising carbon dioxide with a lean solvent, wherein the lean solvent comprises 3-amino-1-propanol (AP), 2-dimethylamino-2-methyl-1-propanol (DMAMP), and water; ...

NOVEL POLYAMINES, SYNTHESIS PROCESS THEREOF AND USE OF SAME FOR THE SELECTIVE ELIMINATION OF H2S FROM A GASEOUS EFFLUENT COMPRISING CO2

The invention concerns novel polyamines having formula (I) obtained from the reaction between a polyol diglycidylether and piperazine: 2. The compound as claimed in claim 1 , in which the radicals Rand Rare connected together via a covalent bond or via a heteroatom in order to form a heterocycle having 5 claim 1 , 6 claim 1 , 7 or 8 atoms when the radical Ris not a hydrogen atom.3. The compound as claimed in claim 2 , in which the heterocycle is a piperazine cycle.4. The compound as claimed in claim 3 , in which the radical Rhas the formula (g).7. The synthesis process as claimed in claim 5 , in which the first reaction and the second reaction are carried out in two successive steps.8. The synthesis process as claimed in claim 5 , in which the first reaction and the second reaction are carried out in a single step.9. The synthesis process as claimed in claim 5 , in which the polyol diglycidylether having formula (IV) for the first reaction is selected from the list constituted by:ethylene glycol diglycidylether;diethylene glycol diglycidylether;triethylene glycol diglycidylether;polyethylene glycol diglycidylether with a molar mass in the range 200 to 2000 g/mole;the diglycidylether of copolymers of ethylene glycol and propylene glycol with a molar mass in the range 200 to 2000 g/mole;1,3-propanediol diglycidylether;1,4-butanediol diglycidylether;1,5-pentanediol diglycidylether;1,6-hexanediol diglycidylether;1,8-octanediol diglycidylether;neopentylglycol diglycidylether;1,4-cyclohexanedimethanol diglycidylether;1,3-cyclohexanedimethanol diglycidylether;1,2-cyclohexanedimethanol diglycidylether;glycerol diglycidylethers;trimethylolethane diglycidylethers;trimethylolpropane diglycidylethers;pentaerythritol diglycidylethers;sorbitol diglycidylethers.10. The synthesis process as claimed in claim 6 , in which the secondary amine having formula (IX) is selected equally from the group constituted by:dimethylamine;diethylamine;2-amino-2-methyl-1-propanol;tris(hydroxymethyl) ...

PORTABLE CARBON DIOXIDE ABSORPTION SYSTEM

Various embodiments of a portable carbon dioxide (CO2) absorption device that may remove excess CO2 from a closed environment are disclosed herein. The absorption device is reusable and configured for many environments. 1. A portable carbon dioxide (CO) absorption device comprising:an exterior housing defining an inlet and an outlet;a blower in fluid communication with the inlet and with an expansion manifold, wherein the blower is disposed within the housing and draws air into the exterior housing through the inlet;the expansion manifold comprising a manifold housing defining an expansion chamber; the expansion chamber, disposed within the housing, filters and reduces a velocity of air received from the blower by expanding a control volume traversing the portable carbon dioxide absorption device;a carbon-dioxide absorbing apparatus disposed within the housing, the carbon-dioxide absorbing apparatus in fluid communication with the expansion manifold and the outlet, where the carbon-dioxide absorbing apparatus, absorbs carbon-dioxide from the air exiting the expansion manifold and,a power supply also disposed within the housing, wherein the power supply is in electrical communication with the blower.2. The portable carbon dioxide absorption device of claim 1 , wherein the blower generates a positive pressure within the portable carbon dioxide absorption device to pull air into the inlet and push the air through the expansion manifold and the carbon dioxide absorbing apparatus.3. The portable carbon dioxide absorption device of claim 1 , further comprising:a control system operatively engaged to the power supply and the blower, wherein the control system operates the blower to generate a desired airflow rate.4. The portable carbon dioxide absorption device of claim 3 , further comprising:{'sub': 2', '2, 'a sensor disposed within or proximal to at least one of the inlet, the outlet, the exterior housing, the blower, the expansion manifold, or the carbon-dioxide ...

SULFUR RECOVERY OPERATION WITH IMPROVED CARBON DIOXIDE RECOVERY

A process for recovering sulfur and carbon dioxide from a sour gas stream, the process comprising the steps of: providing a sour gas stream to a membrane separation unit, the sour gas stream comprising hydrogen sulfide and carbon dioxide; separating the hydrogen sulfide from the carbon dioxide in the membrane separation unit to obtain a retentate stream and a first permeate stream, wherein the retentate stream comprises hydrogen sulfide, wherein the permeate stream comprises carbon dioxide; introducing the retentate stream to a sulfur recovery unit; processing the retentate stream in the sulfur recovery unit to produce a sulfur stream and a tail gas stream, wherein the sulfur stream comprises liquid sulfur; introducing the permeate stream to an amine absorption unit; and processing the permeate stream in the amine absorption unit to produce an enriched carbon dioxide stream. 1. A process for recovering sulfur and carbon dioxide from a sour gas stream , the process comprising the steps of:providing a sour gas stream to a membrane separation unit, the sour gas stream comprising hydrogen sulfide and carbon dioxide;separating the hydrogen sulfide from the carbon dioxide in the membrane separation unit to obtain a retentate stream and a first permeate stream, wherein the retentate stream comprises hydrogen sulfide, wherein the permeate stream comprises carbon dioxide;introducing the retentate stream to a sulfur recovery unit;processing the retentate stream in the sulfur recovery unit to produce a sulfur stream and a tail gas stream, wherein the sulfur stream comprises liquid sulfur;introducing the permeate stream to an amine absorption unit; andprocessing the permeate stream in the amine absorption unit to produce an enriched carbon dioxide stream.2. The process of claim 1 , wherein the retentate stream has a concentration of hydrogen sulfide between 80 and 95 mol %.3. The process of claim 1 , the membrane separation unit comprising a membrane wherein the membrane is a ...

METHOD AND APPARATUS FOR RECOVERING ABSORBING AGENTS IN ACID GAS TREATMENT

A method and apparatus for continuously treating acid gases including recovering absorbent chemicals by introducing streams leaving a regenerator and/or leaving an absorber into a static mixing zone wherein supplemental washing water is added to recover absorbent chemicals. Improvements to the prior art methods are provided where one or more absorbent chemical recovery units are included to increase the amount of recovered absorbent chemicals exiting the regenerator and/or exiting the absorber are increased and/or maximized. Absorbent chemical recovery units can include mixing units where liquid is added to the stream of sour gas and absorbent chemical to mix with and absorb the absorbent chemical from the stream. 159-. (canceled)60. A continuous process for acid gas removal comprising the following steps:(a) introducing into an absorber having an absorber interior and an absorption zone located in the absorber interior a mixture of process gas and acid gas comprising a process gas selected from the group consisting of: a hydrocarbon, a mixture of hydrocarbons, synthesis gas, and a mixture of nitrogen and hydrogen, and a percent by volume of an acid gas selected from the group consisting of: carbon dioxide, hydrogen sulfide, other sulfur containing gases, and mixtures of the acid gases, wherein percent by volume is based on the total volume of the mixture of process gas and acid gas introduced into the absorption zone;(b) counter-currently contacting in the absorption zone the mixture of process gas and acid gas referred to in step “a” with an absorbent chemical, and water, the absorbent chemical and water are in solution prior to contact and(c) removing the process gas overhead from the absorption zone;(d) removing the absorbent chemical and water solution with the acid gas absorbed therein from the bottom of the absorption zone;(e) introducing the solution from step “d” into a regenerator having a regeneration interior and a regeneration zone located in the ...

OIL SOLUBLE SULFIDE SCAVENGERS WITH LOW SALT CORROSION AND METHODS OF MAKING AND USING THESE SCAVENGERS

Sulfide scavengers useful to reduce sulfide concentration in fluid streams and methods of using these scavengers. The scavengers comprise oil soluble reaction products of formaldehyde/N-substituted hydroxylamines and can be used to reduce, for example, HS content in viscous hydrocarbon oil streams. 1. A method for reducing sulfides in a fluid comprising contacting said fluid with a reaction product of a N-substituted hydroxylamine and formaldehyde (AHAF).2. A method as recited in wherein said N-substituted hydroxylamine comprises one or more members selected from the group consisting of N claim 1 ,N-dimethylhydroxylamine claim 1 , N claim 1 ,N-diethylhydroxylamine claim 1 , N claim 1 ,N-dibenzylhydroxylamine claim 1 , N-ethylhydroxylamine claim 1 , N-propylhydroxylamine claim 1 , N-isopropylhydroxylamine claim 1 , N-butylhydroxylamine claim 1 , N-phenylhydroxylamine claim 1 , N-cyclohexylhydroxylamine claim 1 , N-tert-butylhydroxylamine claim 1 , N-benzylhydroxylamine.4. The method as recited in wherein said sulfides comprise one or more members selected from the group consisting of organic sulfides claim 1 , mercaptans claim 1 , thiols claim 1 , COS claim 1 , and HS.5. The method of wherein said fluid is (i) a hydrocarbon claim 1 , (ii) natural gas claim 1 , (iii) water claim 1 , or (iv) a multiphase mixture of hydrocarbon.68-. (canceled)9. The method of wherein said hydrocarbon is a hydrocarbon oil selected from the group consisting of crude oil claim 5 , naptha claim 5 , gas oil claim 5 , bunker fuel claim 5 , marine diesel claim 5 , asphalt claim 5 , and bitumen.10. The method of wherein from about 1 to 100 claim 1 ,000 ppm by volume of said reaction product is brought into contact with said fluid based upon one million parts of said fluid.11. (canceled)12. The method as recited in wherein Rand Rare both C-Calkyl.13. The method as recited in wherein both Rand Rare ethyl.14. A method for making a dialkylhydroxylamine/formaldehyde reaction product comprising ...

PROCESS FOR REMOVAL OF ACID GASES FROM A FLUID STREAM

In a process for removal of acid gases from a fluid stream the fluid stream is contacted with an absorbent to obtain a treated fluid stream and a laden absorbent. The absorbent comprises a diluent and a compound of the general formula (I) wherein Ris C-C-alkyl; Ris C-C-alkyl; Ris selected from hydrogen and C-C-alkyl; and Ris selected from hydrogen and C-C-alkyl 2. The process according to claim 1 , wherein Ris C-C-alkyl.3. The process according to claim 1 , wherein the compound of the general formula (I) is selected from 3-(tert-butylamino)propane-1 claim 1 ,2-diol claim 1 , 1-(tert-butylamino)-3-methoxy-propane-2-ol claim 1 , 3-(iso-propylamino)propane-1 claim 1 ,2-diol claim 1 , and 3-[(2-methylbutan-2-yl)amino]propane-1 claim 1 ,2-diol.4. The process according to claim 1 , wherein the diluent comprises water.5. The process according to claim 4 , wherein the absorbent additionally comprises an acid.6. The process according to claim 1 , wherein the diluent comprises a non-aqueous organic solvent.7. The process according to claim 6 , wherein the organic solvent is selected from Calcohols claim 6 , ketones claim 6 , esters claim 6 , lactones claim 6 , amides claim 6 , lactams claim 6 , sulfones claim 6 , sulfoxides claim 6 , glycols claim 6 , polyalkylene glycols claim 6 , di- or mono(C-alkyl ether) glycols claim 6 , di- or mono(C-alkyl ether) polyalkylene glycols claim 6 , cyclic ureas claim 6 , thioalkanols and mixtures thereof.8. The process according to claim 1 , wherein the absorbent comprises at least one activator selected from a sterically unhindered primary amine and/or a sterically unhindered secondary amine.9. The process according to claim 8 , wherein the activator is piperazine.10. The process according to claim 1 , for selective removal of hydrogen sulfide from a fluid stream comprising carbon dioxide and hydrogen sulfide.11. The process according to claim 1 , wherein the laden absorbent is regenerated by means of at least one of the measures of heating ...

Improved ethylene separation

A polyethylene production process, comprising contacting ethylene and a polymerization catalyst under suitable reaction conditions to yield a polymerization product stream, separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein at least a portion of the ethylene from the light gas stream is absorbed by the absorption solvent system, removing unabsorbed gases of the light gas stream from contact with the absorption solvent system to form a waste gas stream, and recovering ethylene from the absorption solvent system.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Ethylene recovery by absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.