Установка частичного сжижения природного газа

В предложенной установке для частичного сжижения природного газа, включающей источник газа высокого давления, блок осушки, расширительное устройство, выполненное в виде турбодетандера, в котором в качестве тормоза на одном валу установлен турбокомпрессор, блок очистки от СО 2 , теплообменник для предварительного охлаждения, основной теплообменник, сборник-сепаратор сжиженного газа. Осушенный поток разделяется на два - технологический и дополнительный, который направляется в блок очистки от СО 2 . После очистки от СО 2 из дополнительного потока выделяется продукционный поток, а оставшаяся часть подмешивается к технологическому потоку и понижает концентрацию СО 2 в сжимаемом потоке до значений, которые гарантируют невыпадение твердого СО 2 в проточной части турбинного модуля, что позволяет повысить надежность и эффективность работы всей установки сжижения природного газа. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 187 598 U1 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК F25J 1/0022 (2018.08) (21)(22) Заявка: 2017144255, 18.12.2017 (24) Дата начала отсчета срока действия патента: Дата регистрации: 13.03.2019 (45) Опубликовано: 13.03.2019 Бюл. № 8 Адрес для переписки: 115280, Москва, ул. Автозаводская, 25, ОАО "НПО "ГЕЛИЙМАШ" (73) Патентообладатель(и): Открытое акционерное общество "Научно-производственное объединение "ГЕЛИЙМАШ" (ОАО "НПО "ГЕЛИЙМАШ") (RU) (56) Список документов, цитированных в отчете о поиске: RU 2541360 C1, 10.02.2015. RU предварительного охлаждения, основной теплообменник, сборник-сепаратор сжиженного газа. Осушенный поток разделяется на два технологический и дополнительный, который R U 1 8 7 5 9 8 (54) Установка частичного сжижения природного газа (57) Реферат: В предложенной установке для частичного сжижения природного газа, включающей источник газа высокого давления, блок осушки, расширительное устройство, выполненное в виде турбодетандера, в котором в качестве тормоза ...

Process For The Production Of Hydrogen And Carbon Dioxide

The present invention provides a method to more efficiently recover hydrogen and carbon dioxide as well as a design for carbon dioxide capture from syngas that allows for the simultaneous production of medium to high amounts of hydrogen and the capture of at least 90% of the carbon dioxide in the syngas as a part of the production of hydrogen in a hydrogen generation plant. Through the use of a combination of hydrogen selective membranes and carbon dioxide selective membranes together with a carbon dioxide separation unit it is possible to increase recovery of hydrogen and carbon dioxide and improved process efficiency of the hydrogen generation plant.

Cryogenic system for removing acid gases from a hydrocarbon gas stream, with removal of hydrogen sulfide

A system for removing acid gases from a raw gas stream includes an acid gas removal system (AGRS) and a sulfurous components removal system (SCRS). The acid gas removal system receives a sour gas stream and separates it into an overhead gas stream comprised primarily of methane, and a bottom acid gas stream comprised primarily of carbon dioxide. The sulfurous components removal system is placed either upstream or downstream of the acid gas removal system. The SCRS receives a gas stream and generally separates the gas stream into a first fluid stream comprising hydrogen sulfide, and a second fluid stream comprising carbon dioxide. Where the SCRS is upstream of the AGRS, the second fluid stream also includes primarily methane. Where the SCRS is downstream of the AGRS, the second fluid stream is principally carbon dioxide. Various types of sulfurous components removal systems may be utilized.

Carbon Dioxide Purification

A process for the recovery of carbon dioxide from a gas mixture that includes pretreating a gas mixture comprising carbon dioxide, water vapor, and one or more light gases in a pretreating system to form a cooled gas mixture, fractionating the cooled gas mixture to recover a bottoms fraction comprising carbon dioxide and an overheads fraction comprising carbon dioxide and the light gases, passing the overheads fraction over a membrane selective to carbon dioxide to separate a carbon dioxide permeate from a residue gas comprising the light gases, recycling the carbon dioxide permeate to the pretreating system, and recovering at least a portion of the bottoms fraction as a purified carbon dioxide product stream is described.

METHODS AND SYSTEMS TO SEPARATE HYDROCARBON MIXTURES SUCH AS NATURAL GAS INTO LIGHT AND HEAVY COMPONENTS

The present invention provides strategies to integrate adsorption and liquefaction techniques to separate hydrocarbon feed mixtures into purified light and heavy components, respectively. Initially, the hydrocarbon stream is separated into a light and heavy stream. The light stream can be integrated into a natural gas product. The heavy stream is partially liquefied. A first gas liquid separation of the partially liquefied heavy stream at an elevated pressure separates the liquid heavy stream from a methane-containing gas. The rejected methane component, which generally will include some rejected C2 and C3+ material, can be recycled to be combined with the feed mixture for re-processing. A further aspect of the strategy is then to practice at least one additional gas-liquid separation of the separated liquid heavy stream at a lower pressure effective to help further resolve the liquid heavy stream from C2-containing gas. The rejected C2 component, which generally will include some rejected C1 and C3+ material, can then be recycled back into the feed mixture for reprocessing or used as all or a portion of a light hydrocarbon product. 1. A method of separating C1 and C2 hydrocarbons from C3+ hydrocarbons , comprising the steps of:a. providing a feed mixture comprising (i) at least one of C1 and/or C2 hydrocarbons, and (ii) one or more C3+ hydrocarbons;b. using at least one adsorbent to separate the feed mixture into a light component that is enriched in C1 and/or C2 hydrocarbons relative to the feed mixture and a heavy component that is enriched in C3+ content relative to the feed mixture;c. using pressure and temperature to cause the heavy component to be partially liquefied to include a first liquid portion and a first gas portion;d. separating the, first liquid portion and the first gas portion, wherein the separated first liquid portion is enriched in at least one C3+ hydrocarbon relative to the heavy component, and wherein the separated first gas portion is ...

ZEOLITE ADSORBENTS HAVING A HIGH EXTERNAL SURFACE AREA AND USES THEREOF

The present invention concerns the use, for gas separation, of at least one zeolite adsorbent material comprising at least one FAU zeolite, said adsorbent having an external surface area greater than 20 m·g, a non-zeolite phase (PNZ) content such that 0 Подробнее

Liquid Air Energy Storage Systems, Devices, and Methods

Liquid air energy storage (LAES) systems with increased efficiency and operating profit obtained through rational selection and configuration of the equipment used and optimization of the configuration/parameters of such equipment. In various embodiments, the LAES system is intended for operation preferably in an environmentally-friendly stand-alone regime with recovery of hot thermal energy extracted from compressed charging air and cold thermal energy extracted from discharged air.

METHOD AND INSTALLATION FOR STORING AND RECOVERING ENERGY

A method and installation for storing and recovering energy, according to which a condensed air product is formed in an energy storage period, and in an energy recovery period, a pressure flow is formed and is expanded to produce energy using at least part of the condensed air product. For the formation of the condensed air product: the compression of air in an air conditioning unit, at least by means of at least one isothermally operated compressor device and the adsorptive cleaning of the air by means of at least one adsorptive cleaning device at a hyperbaric pressure level. 1. A method for storing and recovering energy in which , in an energy storage period , an air liquefaction product is formed and , in an energy recovery period , a pressurized stream is formed and expanded to perform work by using at least part of the air liquefaction product , the method comprising , compressing air in an air conditioning unit, at least by means of at least one isothermally operated compressor device, and adsorptively purifying the air by means of at least one adsorptive purification device at a superatmospheric pressure level,', 'liquefying the compressed and adsorptively purified air, starting from a temperature level in a range of 0 to 50° C., in a first fraction in a fixed-bed cold storage unit and in a second fraction in a counterflow heat exchanger unit at a liquefaction pressure level in a range of 40 to 100 bara, and', 'subsequently expanding the liquefied air in at least one cold production unit,, 'for the formation of the air liquefaction product,'} producing a vaporization product from at least part of the liquefaction product at a vaporization pressure level, which deviates by no more than 5 bar from the liquefaction pressure level, in the fixed-bed cold storage unit, and', 'forming a fluid stream from at least part of the vaporization product and conducting it through at least one combustion device, in which a fuel is burned., 'and, for the formation of the ...

METHOD AND DEVICE FOR GENERATING A GAS PRODUCT

The invention relates to a method and also a device for producing a gas product, wherein a first gas stream is combined with a second gas stream and the first gas stream that is present at a lower output pressure than the second gas stream is fed to a mechanical compressor in order to be compressed to the preset pressure of the gas product. It is characteristic in this case that the pressure of the first gas stream is elevated using a gas jet compressor arranged upstream of the mechanical compressor, to which gas jet compressor at least a part of the second gas stream is fed as pumping medium. 1. A method for producing a gas product , wherein a first gas stream is combined with a second gas stream and the first gas stream that is present at a lower output pressure than the second gas stream is fed to a mechanical compressor in order to be compressed to the preset pressure of the gas product , characterized in that the pressure of the first gas stream is elevated using a gas jet compressor arranged upstream of the mechanical compressor , to which gas jet compressor at least a part of the second gas stream is fed as pumping medium.2. The method according to claim 1 , characterized in that the part of the second gas stream that is used as pumping medium is fed directly to the gas jet compressor with substantially the output pressure of the second gas stream or subsequently to a pressure elevation carried out using the mechanical compressor.3. The method according to claim 1 , characterized in that the pressure of the first gas stream is elevated using the gas jet compressor on the output pressure thereof to a value which is greater than or equal to the suction pressure of the mechanical compressor.4. The method according to claim 1 , characterized in that the method is used in the production of a carbon monoxide product in which a synthesis gas predominantly consisting of hydrogen and carbon monoxide is fractionated in a cryogenic separation process claim 1 , wherein a ...

METHOD FOR RECOVERING HELIUM

A method for recovering a helium product fraction () from a nitrogen- and helium-containing feed fraction () is described, wherein the nitrogen- and helium-containing feed fraction () is partially condensed (E), separated into a first helium-enriched fraction () and a first nitrogen-enriched fraction () and the former is cleaned again in an adsorptive manner. 2. The method according to claim 1 , characterized in that the third nitrogen-enriched fraction is at least partially work-performing expanded.3. The method according to claim 1 , characterized in that the separation column is operated under a pressure of 7 to 20 bar.4. The method according to claim 1 , characterized in that the third nitrogen-enriched fraction contains at least 50% of the nitrogen contained in the first nitrogen-enriched fraction.5. The method according to claim 1 , characterized in that at least a sub-flow of the second nitrogen-enriched fraction is evaporated against the nitrogen- and helium-containing feed fraction to be partially condensed under a pressure of less than 3 bar.6. The method according to claim 1 , characterized in that the adsorptive cleaning process is a (V)PSA and/or TSA process.7. The method according to claim 3 , characterized in that the separation column is operated under a pressure of 10 to 15 bar. The invention relates to a method for recovering a helium product fraction from a nitrogen- and helium-containing feed fraction, whereinThe term “helium product fraction” be comprised of highly purified helium, the concentration and contamination of which do not exceed a value of 100 vppm, preferably of 10 vppm.The term “nitrogen- and helium-containing feed fraction” be understood as a fraction, which contains 1 to 20 mol-% helium and 80 to 99 mol-% nitrogen. Further, this feed fraction can contain 0.1 to 2 mol-% methane and traces of hydrogen, argon and/or other noble gases.Currently, helium is obtained almost exclusively from a mixture of volatile natural gas components, ...

AIR FRACTIONATION PLANT, OPERATING METHOD AND CONTROL FACILITY

An air fractionation plant in which a cooling water circuit having a recooling apparatus is provided for cooling compressed air, where the recooling apparatus is configured for cooling cooling water using cooling air. The recooling apparatus is configured so as to cool the cooling water, at least at a wet bulb temperature of the cooling air of more than 289 K, to a temperature which is not more than 3 K above the wet bulb temperature. A corresponding operating method and a control facility are likewise provided. 1. An air fractionation plant in which a cooling water circuit having a recooling apparatus is provided for cooling compressed air , where the recooling apparatus is configured for cooling cooling water using cooling air , characterized in that the recooling apparatus is configured so as to cool the cooling water , at least at a wet bulb temperature of the cooling air of more than 289 K , to a temperature which is not more than 3 K above the wet bulb temperature.2. The air fractionation plant according to claim 1 , wherein the recooling apparatus is configured so as to cool the cooling water to a temperature which is at least 0.5 K above the wet bulb temperature.3. The air fractionation plant according to claim 1 , wherein the recooling apparatus comprises a cooling tower.4. The air fractionation plant according to claim 3 , wherein the recooling apparatus has forced ventilation.5. The air fractionation plant according to claim 1 , wherein the cooling water circuit comprises a heat exchanger which is arranged downstream of a compressor.6. The air fractionation plant according to claim 1 , wherein a cooling zone range of from 5 to 25 K is provided.7. A method of operating an air fractionation plant in which a cooling water circuit having a recooling apparatus is provided for cooling compressed air claim 1 , where the recooling apparatus is configured for cooling cooling water using cooling air claim 1 , characterized in that the recooling apparatus is ...

Method and apparatus for argon recovery in a cryogenic air separation unit integrated with a pressure swing adsorption system

A method and apparatus for argon recovery in which an impure argon stream is separated from air within a cryogenic air separation unit having an argon rejection column and a reflux type argon condenser disposed internally within the lower pressure column. An impure argon stream is subsequently recovered from the argon rejection column and purified within an integrated adsorbent based argon refining and purification subsystem to produce product grade argon. The waste stream from the adsorbent based argon refining and purification subsystem is recycled back to the argon rejection column so as to improve the argon recovery.

System and integrated process for liquid natural gas production

A system and method for producing liquid natural gas (LNG) from a natural gas stream is presented. The system includes a moisture removal device and compressor for removing moisture from and compressing the natural gas stream. The low moisture compressed natural gas stream is cooled in a heat exchanger to discharge a cooled compressed discharge stream. A multi-phase turbo expander provides for further cooling and expansion of the cooled compressed discharge stream, generating an expanded exhaust stream comprising a mixture of a vapor comprised substantially of CH 4 and a LNG/ice/solid CO 2 slurry. The expanded exhaust stream is separated to generate a vapor stream comprised substantially of CH 4 and a liquid natural gas/ice/solid CO 2 slurry stream. Further separation of the liquid natural gas/ice/solid CO 2 slurry stream generates a liquid natural gas output stream and an output stream comprised substantially of ice/solid CO 2 .

INTEGRATION OF INDUSTRIAL GAS SITE WITH LIQUID HYDROGEN PRODUCTION

The method for producing liquid hydrogen can include the steps of: introducing pressurized natural gas from a high pressure natural gas pipeline to a gas processing unit under conditions effective for producing a purified hydrogen stream; and introducing the purified hydrogen stream to a hydrogen liquefaction unit under conditions effective to produce a liquid hydrogen stream, wherein the hydrogen liquefaction unit provides a warm temperature cooling and a cold temperature cooling to the purified hydrogen stream, wherein the warm temperature cooling is provided by utilizing letdown energy of a pressurized stream selected from the group consisting of a nitrogen stream sourced from a nitrogen pipeline, a natural gas stream sourced from the high pressure natural gas pipeline, an air gas sourced from an air separation unit, and combinations thereof, wherein the cold temperature is provided by utilizing letdown energy of the purified hydrogen stream. 1. A method for liquefying a pressurized hydrogen gas originating from a pressure swing adsorber unit , the method comprising the steps of:withdrawing a hydrogen containing gas from a methanol production unit;introducing the hydrogen containing gas to a pressure swing adsorber (PSA) unit under conditions effective for purifying the hydrogen containing gas to produce a purified hydrogen stream;sending the purified hydrogen gas to a hydrogen liquefaction unit under conditions effective for the liquefaction of hydrogen thereby producing a liquefied hydrogen stream,wherein the hydrogen liquefaction unit is configured to provide a first refrigeration source and a second refrigeration source, wherein the first refrigeration source provides refrigeration using expansion of a high pressure nitrogen stream, wherein the second refrigeration source provides refrigeration using expansion of a high pressure hydrogen gas stream to produce a warm hydrogen gas stream,wherein the high pressure hydrogen gas stream is derived from a hydrogen ...

SYSTEM FOR PRE-PURIFICATION OF A FEED GAS STREAM

A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers. Alternatively, the pre-purification systems and methods employ a hopcalite catalyst layer and a noble metal catalyst layer separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layer. 1. A method of purifying a gas stream to remove the hydrogen and carbon monoxide impurities present in the gas stream , the method comprising:(a) passing the gas stream substantially free of carbon dioxide and water through a first catalyst layer comprising a mixture manganese and copper oxides configured to remove at least some of the carbon monoxide and hydrogen from the gas stream and produce a first intermediate effluent;(b) passing the first intermediate effluent through an adsorbent layer disposed downstream of the first catalyst layer, the adsorbent layer configured to remove water and carbon dioxide from the intermediate effluent and produce a second intermediate effluent; and(c) passing the second intermediate effluent through a second catalyst layer disposed downstream of the adsorbent layer, the second catalyst layer configured to remove at least hydrogen from the second intermediate effluent to yield an intermediate purified stream.2. The method of claim 1 , wherein the intermediate purified stream is substantially ...

Recovery Of Helium From Nitrogen-Rich Streams

Overall power consumption in a cryogenic distillation process for recovering helium from nitrogen-rich gases comprising helium may be reduced if the feed to the distillation column system is at least substantially condensed by indirect heat exchange against a first bottoms liquid at first pressure, and a second bottoms liquid at a second pressure that is different from the first pressure. 1. Apparatus for recovering helium from a nitrogen-rich feed gas comprising helium , said apparatus comprising:a distillation column system for operation at an elevated operating pressure to separate at least partially condensed feed gas into helium-enriched overhead vapor and nitrogen-enriched bottoms liquid(s);an overhead condenser for partially condensing helium-enriched overhead vapor by indirect heat exchange to produce helium-enriched vapor as product and liquid for reflux in the column system;a first heat exchange system for cooling feed gas by indirect heat exchange with a first nitrogen-enriched bottoms liquid to produce cooled feed gas and vapor for the column system;a first pressure reduction device for reducing the pressure of a second nitrogen-enriched bottoms liquid to produce reduced pressure bottoms liquid;a second heat exchange system for cooling said cooled feed gas by indirect heat exchange against said reduced pressure bottoms liquid to produce at least partially condensed feed gas and vaporized bottoms liquid; anda second pressure reduction device for reducing the pressure of said at least partially condensed feed gas to produce at least partially condensed feed gas at reduced pressure for use as said feed to the distillation column system.2. The apparatus of comprising a third pressure reduction device for reducing the pressure of a third nitrogen-enriched bottoms liquid to produce reduced pressure bottoms liquid for vaporization by indirect heat exchange in said overhead condenser to produce nitrogen-enriched vapor.3. The apparatus of comprising an expander ...

Helium Recovery From Streams Containing Helium, Carbon Dioxide, and at least one of Nitrogen and Methane

Systems and methods are provided for recovering helium from a feed comprising helium, carbon dioxide, and at least one of nitrogen and methane. The feed is separated in a first separator to form helium-enriched stream and a CO-enriched stream. The helium-enriched stream is separated in a pressure swing adsorption unit to form a helium-rich product stream and a helium-lean stream. At least a portion of the helium-lean stream is recycled to the first separator with the feed. In some embodiments, a membrane separation unit is used to enhance helium recovery. 1. A method for recovering helium from a feed stream containing helium , carbon dioxide and at least one of methane and nitrogen , the method comprising:{'sub': 2', '2, 'introducing a separator feed stream into a separator, the separator feed stream comprising at least a portion of the feed stream, separating the separator feed stream into a first helium-enriched stream and a first CO-enriched stream, and withdrawing the first helium-enriched stream and the first CO-enriched stream from the separator;'}introducing a pressure swing adsorption unit feed stream into a pressure swing adsorption unit, the pressure swing adsorption unit feed stream comprising at least a portion of the first helium-enriched stream, separating the pressure swing adsorption unit feed stream into a helium-rich product stream and a helium-lean stream, and withdrawing the helium-rich product stream and the helium-lean stream from the pressure swing adsorption unit;compressing a compressor feed stream in a compressor to form a compressor effluent stream, the compressor feed stream comprising the helium-lean stream and a helium-enriched permeate stream;introducing a first portion of the compressor effluent stream into a membrane separation unit, separating the first portion of the compressor effluent stream to form the helium-enriched permeate stream and a helium-depleted non-permeate stream, and withdrawing the helium-enriched permeate stream ...

Rapid Cycle Pressure Swing Adsorption Process and Adsorbent Laminates for Use Therein

A rapid cycle pressure swing adsorption (RCPSA) air purification process, apparatus, and device for the removal of at least one of water, carbon dioxide, nitrous oxide, and one or more hydrocarbons from a feed air stream prior to cryogenic air separation.

SYSTEM AND METHOD FOR SEPARATING AIR GASES AT LOW PRESSURE

An air gas separation plant comprising, in the direction of circulation of the air stream: a compression means that makes it possible to compress the air stream to a pressure P of between 1.15 bar abs and 2 bar abs, an adsorption unit of TSA type, and a cryogenic distillation unit, with the adsorption unit comprising at least two adsorbers A and B each having a parallelepipedal casing arranged horizontally and comprising: an air stream inlet and an air stream outlet, a fixed bed adsorbent mass, likewise of parallelepipedal shape, the faces of which are parallel to the faces of the casing; and a set of volumes allowing the air stream to pass through the adsorbent mass horizontally, over the entire cross-section and throughout the entire thickness thereof.

Facility For Producing Gaseous Methane By Purifying Biogas From Landfill, Combining Membranes And Cryogenic Distillation For Landfill Biogas Upgrading

A process and facility for producing gaseous methane by purifying biogas from landfill, can include a VOC purification unit, at least one membrane, a booster, a COpurification unit, a cryodistillation unit comprising a heat exchanger, a distillation column, and a subcooler, a deoxo, and a dryer. 1a compression unit for compressing an initial gas flow of the biogas to be purified,a VOC purification unit arranged downstream of the compression unit to receive the compressed initial flow of the biogas and comprising at least one adsorber loaded with adsorbents capable of reversibly adsorbing VOCs to thereby produce a VOC-depleted gas flow;at least one membrane arranged downstream of the VOC purification unit to receive the VOC-depleted gas flow and subject the VOC-depleted gas flow to at least one membrane separation to thereby produce a retentate;a booster arranged downstream of the membrane unit to receive the retentate from the membrane capable of increasing the pressure of the retentate to produce a pressurized retentate;{'sub': 2', '2', '2', '2, 'a COpurification unit arranged downstream of the booster to receive the pressurized retentate, wherein the COpurification unit comprises at least one adsorber loaded with adsorbents capable of reversibly adsorbing the majority of remaining COfrom the pressurized retentate to produce a CO-depleted gas flow;'}{'sub': 2', '2', '2', '2', '2', '2, 'a cryodistillation unit comprising a heat exchanger, a distillation column, and a subcooler, the cryodistillation unit arranged downstream of the COpurification unit to receive the CO-depleted gas flow and subject the CO-depleted gas flow to a cryogenic separation to separate Oand Nfrom the CO-depleted gas flow capable and to produce 2 methane enriched flows respectively a low pressure (LP) and a medium pressure (MP) methane enriched flows;'}a compressor compressing the low pressure methane enriched flow, in order to mix it with the medium pressure methane enriched flow, to produce a ...

DISTILLATION COLUMN SYSTEM AND PLANT FOR PRODUCTION OF OXYGEN BY CRYOGENIC FRACTIONATION OF AIR

A distillation column system and a plant are for production of oxygen by cryogenic fractionation of air. The distillation column system has a high-pressure column and a low-pressure column, a main condenser, and an argon column with an argon column top condenser. The low-pressure column comprises an upper mass transfer region, a lower mass transfer region and a middle mass transfer region. The argon column top condenser is arranged within the low-pressure column between the upper and middle mass transfer regions and is configured as a forced-flow evaporator. 1. A distillation column system for obtaining oxygen by cryogenic fractionation of air , comprisinga high-pressure column and a low-pressure column,a main condenser configured as a condenser-evaporator, the liquefaction space of the main condenser being in flow connection with the top of the high-pressure column,and comprising an argon column whichis in flow connection with an intermediate point in the low-pressure column, andhas means of drawing off an argon-enriched stream andan argon column top condenser which is configured as a condenser-evaporator and is in flow connection with the top of the argon column,the low-pressure column has an upper mass transfer region, a lower mass transfer region and a middle mass transfer region,the middle mass transfer region has at least one first mass transfer space which is open in the upward direction toward the upper mass transfer region and in the downward direction toward the lower mass transfer region,characterized in thatthe upper mass transfer region has a liquid collector at its bottom end,the first mass transfer space has a liquid distributor at its top,the argon column top condenser is arranged within the low-pressure column between the upper and middle mass transfer regions, and in that means of introducing liquid from the liquid collector beneath the upper mass transfer region into the inlet of the evaporation space of the argon column top condenser, and', 'a ...

Method of natural gas pretreatment

A method of natural gas treatment including introducing a natural gas containing stream into a dryer unit, thereby producing a treated natural gas containing stream. Introducing the treated natural gas containing stream into a nitrogen rejection unit, thereby producing a further treated natural gas stream as a nitrogen rejection unit product. Splitting the nitrogen rejection unit product into at least two portions, introducing the first portion of the further treated natural gas stream into a reformer unit as first part of feed, and introducing a second portion of the further treated natural gas stream into the dryer unit as a regeneration stream, thereby producing a regeneration waste stream. Introducing at least a portion of the regeneration waste stream into the reformer unit as second part of feed.

Facility For Producing Gaseous Biomethane By Purifying Biogas From Landfill Combining Membranes, Cryodistillation And Deoxo

A process and facility for producing gaseous methane by purifying biogas from landfill can include a VOC purification unit, at least one membrane, a CO2 purification unit, a cryodistillation unit comprising a heat exchanger and a distillation column, a deoxo, and a dryer.

SYSTEM AND METHOD FOR ENHANCED RECOVERY OF LIQUID OXYGEN FROM A NITROGEN AND ARGON PRODUCING CRYOGENIC AIR SEPARATION UNIT

A moderate pressure, argon and nitrogen producing cryogenic air separation unit and air separation cycle having a higher pressure column, a lower pressure column and an argon column arrangement is disclosed. The moderate pressure, argon and nitrogen producing cryogenic air separation unit is configured to take a first portion of an oxygen enriched stream from the lower pressure column, which together with an external source of liquid nitrogen is used as the boiling side refrigerant to condense the argon in the argon condenser. Use of the external source of liquid nitrogen in the argon condenser allows a second portion of the oxygen enriched stream from the lower pressure column to be taken as a liquid oxygen product stream. 1. A nitrogen and argon producing cryogenic air separation unit comprising:a distillation column system having a higher pressure column and a lower pressure column linked in a heat transfer relationship via a condenser-reboiler and configured to separate an incoming feed air stream and produce an oxygen enriched stream from the base of the lower pressure column and a nitrogen product stream from the overhead of the lower pressure column;the distillation column system further includes an argon column arrangement operatively coupled with the lower pressure column, the argon column arrangement having at least one argon column and an argon condenser, and wherein the argon column arrangement is configured to receive an argon-oxygen enriched stream from the lower pressure column and to produce an oxygen enriched bottoms stream that is returned to or released into the lower pressure column and an argon-enriched overhead that is directed to the argon condenser;wherein the argon condenser is configured to condense the argon-enriched overhead against a mixture of a first portion of the oxygen enriched stream from the lower pressure column and a stream of liquid nitrogen from an external source to produce a crude argon stream or a product argon stream, an ...

PROCESS AND APPARATUS FOR PRODUCING CARBON MONOXIDE

The present invention relates to a cold box cycle which allows for independent control of the heat supplied for reboilers associated with the separation columns. More specifically, the invention relates to the tight control of the hydrogen removal separation, thus avoiding the possibility of excess reboiling in this separation. Optimal reboiling also results in a lower temperature of the hydrogen depleted liquid from this separation. As this stream is used to provide a portion of the cooling at the cold end of the primary heat exchanger, lower temperatures facilitate cooling of the incoming syngas feed, reducing carbon monoxide (CO) losses into the crude hydrogen stream from the high pressure separator. Lower CO in the crude hydrogen allows for smaller hydrogen purification equipment. 1. A method for the separation of carbon monoxide and hydrogen from a syngas feedstock , comprising:cooling and partially condensing the syngas feedstock containing carbon monoxide and hydrogen in a primary heat exchanger to produce a cooled and partially condensed syngas feed stream;separating the cooled and partially condensed syngas feed stream in a first hydrogen rich vapor stream and a first carbon monoxide rich liquid stream in a high pressure separator;feeding the first carbon monoxide rich liquid stream to a hydrogen removal column operating at a pressure lower than the high pressure separator, wherein a second hydrogen rich vapor stream is separated from a second carbon monoxide rich stream;splitting said second carbon monoxide rich stream into two portions wherein a first portion of the second carbon monoxide rich stream is at least partially vaporized in the primary heat exchanger and providing a second portion of the second carbon monoxide rich stream wherein both portions are introduced into a carbon monoxide/methane column for separating purified carbon monoxide vapor stream from a methane rich liquid stream;separating a portion of the cooled syngas feedstock to provide ...

CRYOGENIC ADSORPTION PROCESS FOR XENON RECOVERY

An adsorption process for xenon recovery from a cryogenic liquid or gas stream is described wherein a bed of adsorbent is contacted with the aforementioned xenon containing liquid or gas stream and adsorbs the xenon selectively from this fluid stream. The adsorption bed is operated to at least near full breakthrough with xenon to enable a deep rejection of other stream components, prior to regeneration using the temperature swing method. Operating the adsorption bed to near full breakthrough with xenon, prior to regeneration, enables production of a high purity product from the adsorption bed and further enables oxygen to be used safely as a purge gas, even in cases where hydrocarbons are co-present in the feed stream. 1. An adsorption process for the recovery of xenon from a cryogenic feed stream containing xenon which comprises:i. feeding the feed stream at cryogenic temperatures into the inlet of an adsorption vessel having an inlet and an outlet and containing an adsorbent bed therein, wherein said adsorbent bed contains at least one adsorbent selective for xenon,ii. maintaining said adsorbent bed on feed until the xenon concentration at the outlet of said bed is greater than or equal to 70% of the xenon concentration at the inlet to said adsorbent bed,iii. ending the feed to the adsorption bed and purging same with a purge gas,iv. increasing the temperature of said adsorbent bed to a temperature effective to desorb substantially all of said xenon from the adsorbent in said adsorbent bed,v. recovering the xenon product desorbed from said adsorbent bed,vi. cooling said adsorbent bed to cryogenic temperatures with a cryogenic fluid, andrepeating steps i.-vi. in a cyclic manner.2. The process of wherein said cryogenic feed stream is an oxygen feed stream which claim 1 , in addition to xenon claim 1 , comprises at least one other adsorbable component.3. The process of wherein said at least one other adsorbable component is a hydrocarbon or krypton.4. The process of ...

PROCESS AND PLANT FOR PRODUCING LIQUEFIED NATURAL GAS

The invention relates to a process () for producing liquefied natural gas using a feedstock mixture that contains at least methane, one or more components boiling at a temperature lower than methane and one or more hydrocarbons boiling at a temperature higher than methane, wherein the hydrocarbon(s) boiling at a temperature higher than methane comprise one or more hydrocarbons freezing at a higher temperature, with a freezing point higher than −50° C. According to the invention the feedstock mixture is fed into a pressure swing adsorption process (), in which a first fraction containing methane and a second fraction containing methane are formed, the first fraction containing methane contains, in addition to the methane, at least the predominant portion of the components of the feedstock mixture that boil more readily than methane and is low in or free from the hydrocarbons boiling less readily than methane, and the second fraction containing methane contains, in addition to the methane, at least the predominant portion of the hydrocarbons from the feedstock that boil less readily than methane and is low in or free from the components that boil more readily than methane, and the first fraction containing methane, or a portion thereof, is supplied for liquefaction (). The invention also relates to a corresponding plant. 2100102020. Process () according to claim 1 , wherein the first fraction containing methane is provided by means of the pressure swing adsorption process () at an absolute pressure level of 20 to 40 bar claim 1 , and wherein the first fraction containing methane claim 1 , or the portion thereof supplied for liquefaction () claim 1 , is supplied for liquefaction () at this absolute pressure level.310030. Process () according to claim 1 , wherein the second fraction containing methane is provided in the pressure swing adsorption process at an absolute pressure level of 0.1 to 5 bar claim 1 , and wherein the second fraction containing methane claim 1 , ...

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A method for purifying a hydrogen , nitrogen , methane and argon containing feed stream to produce a hydrogen and nitrogen containing synthesis gas and a methane fuel gas , the method comprising the steps of:conditioning the feed stream to a temperature near saturation at a pressure greater than about 300 psia;directing the conditioned feed stream to a synthesis gas rectification column configured to produce an hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;directing the methane-rich condensed phase stream to a hydrogen stripping column configured to strip hydrogen from the methane-rich condensed phase stream and produce a hydrogen free methane bottom stream and a hydrogen enriched gaseous overhead;vaporizing the hydrogen free methane bottom stream to produce a vaporized or partially vaporized hydrogen free methane-rich stream;warming the hydrogen and nitrogen enriched overhead vapor stream via indirect heat exchange with the feed stream to produce the hydrogen and nitrogen containing synthesis gas; andwarming the vaporized or partially vaporized hydrogen free methane-rich stream via indirect heat exchange with the feed stream to produce the methane fuel gas.2. The method of claim 1 , ...

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A method for purifying a stream comprising hydrogen , nitrogen , methane and argon to produce a hydrogen and nitrogen containing synthesis gas , a methane rich fuel gas , and at least one nitrogen product , the method comprising the steps of:conditioning the pre-purified feed stream to a temperature near saturation at a pressure greater than about 300 psia;directing the conditioned feed stream to a synthesis gas rectification column configured to produce an hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;vaporizing the methane-rich condensed phase stream to produce a vaporized or partially vaporized methane-rich stream;directing the vaporized or partially vaporized methane-rich stream and a nitrogen reflux stream to a nitrogen rectification column configured to produce a nitrogen containing overhead vapor stream substantially free of methane, and a methane enriched liquid bottoms stream;warming at least a portion of the nitrogen containing overhead vapor stream via indirect heat exchange with the feed stream to produce a warm gaseous nitrogen stream and directing the warm gaseous nitrogen stream to a nitrogen recovery system to produce the at least one nitrogen product;warming the ...

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A cryogenic purification system configured for purifying a hydrogen , nitrogen , methane and argon containing feed stream , the system comprising:a synthesis gas rectification column configured to receive the feed stream and produce a hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;a hydrogen stripping column configured to receive the methane-rich condensed phase stream from the synthesis gas rectification column, strip hydrogen from the methane-rich condensed phase stream and produce a hydrogen free methane bottom stream and a hydrogen enriched gaseous overhead;a condenser configured to receive the hydrogen free methane bottom stream and a working fluid and to produce a vaporized or partially vaporized hydrogen free methane-rich stream; anda heat exchanger configured to (a) warm the hydrogen and nitrogen enriched overhead vapor stream via indirect heat exchange with the feed stream to produce a hydrogen and nitrogen containing synthesis gas; and (b) to warm the vaporized or partially vaporized hydrogen free methane-rich stream via indirect heat exchange with the feed stream to produce a methane fuel gas.2. The system of claim 1 , further comprising a compressor disposed upstream of ...

TREATMENT METHOD FOR SEPARATING CARBON DIOXIDE AND HYDROGEN FROM A MIXTURE

The invention relates to a method fro treating a mixture in order to separate carbon dioxide and hydrogen from said mixture, in which: i) the mixture is cooled and partially condensed and a first liquid is separated from the rest of the mixture in a first phase separator; ii) a gas from or derived from a gas from the first phase separator is treated in a hydrogen pressure swing adsorption module in order to produce a hydrogen-rich gas and a hydrogen-depleted residual gas; and iii) said hydrogen-depleted residual gas or a gas derived from said depleted gas is cooled and partially condensed and a second liquid is separated from the remaining gas in a second phase separator, separate from the first phase separator, wherein the first and/or second liquid being rich in carbon dioxide. The invention also relates to an installation for implementing such a method. 115-. (canceled)16. A process for treating a mixture for the purpose of separating carbon dioxide and hydrogen from this mixture , the process comprising the steps of:i) cooling and partially condensing the mixture is cooled and then separating a first liquid from the mixture in a first phase separator;ii) treating a gas originating or derived from a top gas from the first phase separator in a pressure swing adsorption module for hydrogen to produce a hydrogen-rich gas and a hydrogen- depleted residual gas; andiii) cooling and partially condensing said hydrogen-depleted residual gas or a gas derived from said hydrogen-depleted gas and then separating a second liquid the remaining gas in a second phase separator that is different from the first phase separator,wherein the first liquid and/or second liquid or a liquid derived from the first liquid and/or second liquid originating from the first phase separator and/or from the second phase separator are rich in carbon dioxide as compared to the mixture,wherein the partial condensations in steps i) and iii) are performed in the same cryogenic unit.17. The process as ...

PURIFICATION OF ARGON THROUGH LIQUID PHASE CRYOGENIC ADSORPTION

The invention relates to a process for removing oxygen from liquid argon using a TSA (temperature swing adsorption) cyclical process that includes cooling an adsorbent bed to sustain argon in a liquid phase; supplying the adsorbent bed with a liquid argon feed that is contaminated with oxygen and purifying the liquid argon thereby producing an argon product with less oxygen contaminant than is in the initial liquid argon feed; draining the purified residual liquid argon product and sending purified argon out of the adsorbent bed. Regeneration of specially prepared adsorbent allows the adsorbent bed to warm up to temperatures that preclude the use of requiring either vacuum or evacuation of adsorbent from the bed. 1. An adsorption process for purifying a feed stream containing primarily liquid argon and oxygen , comprising the following cycle of process steps:a) supplying from the inlet of an adsorbent bed said liquid argon feed that contains oxygen, adsorbing at least part of the oxygen on the adsorbent thereby producing a purified liquid argon product leaving said adsorbent bed from the outlet with less oxygen than present in said liquid argon feed at the inlet;b) draining from said adsorbent bed purified residual liquid argon by introducing a displacement purge gas;c) allowing said adsorbent bed containing said adsorbent to warm to a temperature, desorbing at least part of the adsorbed oxygen and removing said adsorbed oxygen from the adsorbent bed such that the liquid argon feed may be supplied for purposes of repeating the cycle;d) cooling said adsorbent bed having an inlet and an outlet and containing an adsorbent such that said adsorbent bed is cooled to a temperature below the boiling point of argon;e) wherein said process steps (a)-(d) are repeated in a cyclical manner.2. The process of claim 1 , wherein the liquid argon feed for step (a) contains more than 10 parts per million of oxygen and less or equal to 10 claim 1 ,000 parts per million of oxygen and ...

Helium Extraction from Natural Gas

A helium-containing stream is recovered from a natural gas feed using a membrane followed by multiple distillation steps. Refrigeration is provided by expanding a bottoms liquid with a higher nitrogen content than the feed, achieving a lower temperature in the process. The helium-enriched vapor is then purified and the helium-containing waste stream is recycled to maximize recovery and reduce the number of compressors needed. The helium-depleted natural gas stream can be returned at pressure for utilization or transportation.

Method for the production of air gases by the cryogenic separation of air with improved front end purification and air compression

A method and apparatus for the production of air gases by the cryogenic separation of air with front end purification and air compression can include using an available compressed dry gas such as nitrogen, oxygen, stored purified air, or synthetic air to repressurize the adsorber without diverting any of the purified air just exiting the currently on-line adsorber or changing the flow rate of the main air compressor or air sent to the cold box. This enables the main air compressor (MAC) to operate at a relatively constant flow rate while also sending a relatively constant air flow to the cold box during this repressurization step, thereby reducing the risks of process upsets and minimizing capital expenditures related to the MAC and other warm-end equipments.

METHOD FOR FLEXIBLE RECOVERY OF ARGON FROM A CRYOGENIC AIR SEPARATION UNIT

A method for flexible production of argon from a cryogenic air separation unit is provided. The disclosed cryogenic air separation unit is capable of operating in a ‘no-argon’ or ‘low-argon’ mode when argon demand is low or non-existent and then switching to operating in a ‘high-argon’ mode when argon is needed. The recovery of the argon products from the air separation unit is adjusted by varying the percentages of dirty shelf nitrogen and clean shelf nitrogen in the reflux stream directed to the lower pressure column. The cryogenic air separation unit and associated method also provides an efficient argon production/rejection process that minimizes the power consumption when the cryogenic air separation unit is operating in a ‘no-argon’ or ‘low-argon’ mode yet maintains the capability to produce higher volumes of argon products at full design capacity to meet argon product demands. 1. A method of producing an argon product in an air separation unit , the method comprising the steps of:producing a stream of compressed and purified air;cooling the compressed and purified air stream in a main heat exchanger system;rectifying the cooled, compressed and purified air stream in a distillation column system configured to produce a plurality of products including one or more oxygen products and the argon product, wherein the distillation column system comprises a higher pressure column and a lower pressure column linked in a heat transfer relationship via a condenser-reboiler and an argon column,extracting a clean shelf nitrogen stream and a dirty shelf nitrogen stream from the distillation column systemsubcooling the clean shelf nitrogen stream and the dirty shelf nitrogen stream in one or more nitrogen subcoolers;directing the subcooled clean shelf nitrogen stream to an uppermost location of the lower pressure column and the subcooled dirty shelf nitrogen stream to another location of the lower pressure column at or below the uppermost location;wherein the air separation ...

SYSTEM AND METHOD FOR FLEXIBLE RECOVERY OF ARGON FROM A CRYOGENIC AIR SEPARATION UNIT

A system and method for flexible production of argon from a cryogenic air separation unit is provided. The cryogenic air separation unit is capable of operating in a ‘no-argon’ or ‘low-argon’ mode when argon demand is low or non-existent and then switching to operating in a ‘high-argon’ mode when argon is needed. The recovery of the argon products from the air separation unit is adjusted by varying the percentages of dirty shelf nitrogen and clean shelf nitrogen in the reflux stream directed to the lower pressure column. The cryogenic air separation unit and associated method also provides an efficient argon production/rejection process that minimizes the power consumption when the cryogenic air separation unit is operating in a ‘no-argon’ or ‘low-argon’ mode yet maintains the capability to produce higher volumes of argon products at full design capacity to meet argon product demands. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. (canceled)15. (canceled)16. (canceled)17. (canceled)18. (canceled)19. (canceled)20. (canceled)21. (canceled)22. (canceled)23. (canceled)24. (canceled)25. (canceled)26. (canceled)27. (canceled)28. (canceled)29. (canceled)30. An air separation unit comprising:a main air compression system configured for producing a compressed and purified air stream;a main heat exchange system configured to cool the compressed and purified air stream;a distillation column system comprising a plurality of columns including a higher pressure column and a lower pressure column linked in a heat transfer relationship via a condenser-reboiler and an argon column arrangement operatively coupled with the lower pressure column, the distillation column system configured to receive the compressed and purified air stream and produce a clean shelf nitrogen stream, a dirty shelf nitrogen stream from the plurality of columns, one or more oxygen ...

FACILITY AND METHOD FOR PRODUCING LIQUID HELIUM

The invention relates to a facility for producing liquid helium from a source gas mixture substantially comprising nitrogen and helium. The facility includes a cryogenic purifier including a system for separating the nitrogen from the source gas mixture with a view to producing helium at a temperature lower than the temperature of the source gas. The facility also includes a helium liquefier that subjects the helium to a work cycle including, in series: compressing the helium, cooling and decompressing the compressed helium, and reheating the cooled, decompressed helium. The facility includes a helium transfer pipe connecting an outlet of the purifier to an inlet of the liquefier in order to transfer helium produced by the purifier into the work cycle of the liquefier. The facility is characterized in that the cryogenic purifier includes a decompression system that includes an inlet to be connected to a source of pressurized nitrogen gas. Said system for decompressing the nitrogen gas exchanges heat with the separation system in order to transfer cold from the decompressed nitrogen gas to said separation system. 110-. (canceled)11. A facility for producing liquid helium from a source gas mixture comprising nitrogen and helium , the facility comprising:a cryogenic purifier comprising a circuit for separating nitrogen from the source gas mixture with a view to producing helium at a temperature below a temperature of the source gas;a helium liquefier that subjects the helium to a work cycle comprising in series:a compression of the helium, a cooling and an expansion of the compressed helium and a reheating of the cooled and expanded helium; and the cryogenic purifier further comprises an expansion circuit that comprises an inlet intended to be connected to a source of pressurized gaseous nitrogen;', 'the circuit for expanding the gaseous nitrogen is in heat exchange with the separation circuit in order to transfer frigories from the expanded gaseous nitrogen to said ...

PRESSURE SWING ADSORPTION INTEGRATION IN STEAM CRACKING ETHYLENE PLANTS FOR IMPROVED HYDROGEN RECOVERY

A process is provided for increasing the recovery of high-purity hydrogen from a steam cracking process in situations where byproduct methane yield is high relative to hydrogen. After a hydrocarbon gas stream is sent through a cold box and demethanizer, a small proportion of methane is sent through a pressure swing adsorption unit separately from a gas stream that contains hydrogen to increase high-purity hydrogen recovery by about 6%. 1. A process for producing high purity hydrogen from a gas stream comprising hydrocarbons comprising passing said gas stream through a demethanizer unit to produce a C2+ stream , a methane stream and a hydrogen stream; sending a portion of said methane stream and said hydrogen stream to a pressure swing adsorption unit to produce a high purity hydrogen stream and a tail gas stream.2. The process of wherein said pressure swing adsorption unit comprises a layer of a copper containing adsorbent to remove carbon monoxide from said gas stream.3. The process of wherein said layer of a copper containing adsorbent removes carbon monoxide from said gas stream.4. The process of wherein said layer of copper containing adsorbent adsorbs a very low proportion of methane from said gas stream.5. The process of wherein said pressure swing adsorption unit comprises a layer of activated carbon adsorbent.6. The process of wherein said pressure swing adsorption unit comprises a layer of a 5 A molecular sieve.7. The process of claim 1 , further comprising at least one of:sensing at least one parameter of the process and generating a signal from the sensing;sensing at least one parameter of the process and generating data from the sensing;generating and transmitting a signal;generating and transmitting data. This application claims priority from provisional application 62/739,032, filed Sep. 28, 2018, which is incorporated herein in its entirety.Hydrogen is a valuable product that is used in refining and petrochemicals processing, and methods are needed to ...

Apparatus and method for separating co2 at low temperature comprising a step of separation by permeation

In a method for separating a mixture containing carbon dioxide, the mixture is cooled in a heat exchanger and partially condensed and a first liquid is separated from the mixture in a first system operating at low temperature comprising at least one first phase separator and a gas from the first system is treated in a membrane system to produce a permeate and a non-permeate, the gas from the first system being divided into two portions, a first portion being sent to the membrane system without being heated and a second portion being heated to at least an intermediate temperature of the heat exchanger and then sent to the membrane system without being cooled.

PROCESS AND PLANT FOR THE COMBINATION PRODUCTION OF A MIXTURE OF HYDROGEN AND NITROGEN AND ALSO OF CARBON MONOXIDE BY CRYOGENIC DISTILLATION AND CRYOGENIC SCRUBBING

Process for the combined production of a mixture of hydrogen and nitrogen, and of carbon monoxide by cryogenic distillation and cryogenic scrubbing, wherein a methane-rich liquid is introduced at a first intermediate level of a scrubbing column as first scrubbing liquid and at least one nitrogen-rich liquid is introduced at a level higher than the first level of the scrubbing column as second scrubbing liquid and a mixture of hydrogen and nitrogen is drawn off as overhead gas from the scrubbing column. 110-. (canceled)11. A process for the combined production of a mixture of hydrogen and nitrogen , of carbon monoxide by cryogenic distillation and cryogenic scrubbing , wherein the process comprises the steps of:i) cooling, in a heat exchanger, a gas mixture containing at least hydrogen, carbon monoxide and methane;ii) sending the cooled mixture to a scrubbing column;iii) introducing a methane-rich liquid at a first intermediate level of the scrubbing column as a first scrubbing liquid;iv) introducing at least one nitrogen-rich liquid at a level higher than the first level of the scrubbing column as a second scrubbing liquid;v) withdrawing a mixture of hydrogen and nitrogen as an overhead gas from the scrubbing column;vi) withdrawing a first bottoms liquid from the scrubbing column and then sending said first bottoms liquid to a stripping column;vii) withdrawing a liquid that is level with an intermediate section of the scrubbing column and sending said liquid either to the heat exchanger, or to a stripping column overhead gas line, or to a second stripping column;viii) withdrawing a second bottoms liquid from the stripping column and then sending to a column configured to separate carbon monoxide and methane; andix) withdrawing a fluid rich in carbon monoxide from the separating column;x) withdrawing a third bottoms liquid from the separating column, wherein at least one portion of the third bottoms liquid from the separating column constitutes the methane-rich ...

Recuperative Heat Exchange for Desiccation of Cold Fluids

Devices, systems, and methods for removing a component from a fluid are disclosed. A feed fluid is heated by passing the feed fluid through a heating path of a first indirect-contact heat exchanger (ICHE). The feed fluid contains a first component. The fluid is heated from a first temperature to a second temperature, resulting in a heated feed fluid. The heated feed fluid is passed through a desiccator, containing a desiccant. The first component is bound up to the desiccant, resulting in a stripped-heated feed fluid. The stripped-heated feed fluid is cooled by passing the stripped-heated feed fluid through a cooling path of the first indirect-contact heat exchanger (ICHE). The stripped-heated feed fluid is cooled from a second temperature to a third temperature, the third temperature being greater than the first temperature, producing a product fluid. 1. A method for removing a component from a fluid comprising:heating a feed fluid, the feed fluid comprising a first component, by passing the feed fluid through a heating path of a first indirect-contact heat exchanger (ICHE), wherein the fluid is heated from a first temperature to a second temperature, resulting in a heated feed fluid;passing the heated feed fluid through a desiccator, containing a desiccant, wherein the first component is bound up to the desiccant, resulting in a stripped-heated feed fluid;cooling the stripped-heated feed fluid by passing the stripped-heated feed fluid through a cooling path of the first ICHE, wherein the stripped-heated feed fluid is cooled from the second temperature to a third temperature, the third temperature being greater than the first temperature, producing a product fluid.2. The method of claim 1 , wherein the second temperature is maintained substantially at an ambient temperature.3. The method of claim 2 , wherein passing the feed fluid at a feed rate provides a first sensible heat transfer from the desiccant to the feed fluid claim 2 , and wherein the feed rate is ...

Cryogenic purification with heat uptake

Process for purifying a gaseous feed stream using an adsorption unit comprising at least two adsorbers, a cryogenic distillation unit, an exchanger and a compressor operating at a temperature less than or equal to −50° C., in which the heat necessary for the regeneration of the adsorbers is derived, at least partly, from at least one portion of the heat generated by the compressor, during the compression of a fluid.

SYSTEMS AND METHODS FOR PRODUCTION AND SEPARATION OF HYDROGEN AND CARBON DIOXIDE

The present disclosure relates to systems and methods useful for providing one or more chemical compounds in a substantially pure form. In particular, the systems and methods can be configured for separation of carbon dioxide from a process stream, such as a process stream in a hydrogen production system. As such, the present disclosure can provide systems and method for production of hydrogen and/or carbon dioxide. 1. A process for separating carbon dioxide (CO) from a process stream comprising COand one or more further components , the process comprising:{'sub': '2', 'providing the process stream at a pressure such that a partial pressure of the COin the process stream is at least 15 bar;'}{'sub': '2', 'drying the process stream sufficiently so that a dew point of the process stream comprising the COis reduced to a temperature of about −20° C. or less;'}{'sub': '2', 'cooling the process stream in at least one heat exchanger to provide the process stream comprising the COas a two phase stream;'}expanding the two phase stream so as to reduce the temperature of the two phase stream to a temperature that is within about 15° C. of a freezing point of the two phase stream; and{'sub': '2', 'separating the two phase stream to provide a vapor stream enriched with at least one of the one or more further components and to provide a liquid stream that is enriched with the CO.'}2. The process of claim 1 , wherein the drying comprises passage of the process stream comprising the COthrough a desiccant-packed bed.3. The process of claim 1 , wherein the cooling comprises cooling the process stream against at least a portion of the liquid stream that is enriched with the CO.4. The process of claim 3 , wherein the cooling comprises cooling the process stream in a first heat exchanger and in a second heat exchanger.5. The process of claim 4 , wherein the cooling comprises cooling the process stream in the first heat exchanger against a first portion of the liquid stream that is ...

METHOD AND APPARATUS FOR AIR SEPARATION BY CRYOGENIC DISTILLATION

A method for separating air by cryogenic distillation in a system of columns comprising a first column and a second column operating at a lower pressure than the first column, comprising the steps of compressing all of the feed air in a first compressor to a first output pressure of at least 1 bar greater than the pressure of the first column, sending a first portion of the air under the first output pressure to the second compressor, and compressing the air to a second output pressure, cooling and condensing at least a portion of the air under the second output pressure in a heat exchanger, withdrawal of a liquid from a column of the system of columns, pressurising the liquid and evaporating the liquid by heat exchange in the heat exchanger, and pressure reduction of a portion of the compressed air to a second output pressure, at least partially evaporating said air in the heat exchanger, optionally additional heating of said air in the heat exchanger, and sending at least a portion of this air to the second compressor. 115-. (canceled)16. A process for the separation of air by cryogenic distillation in a system of columns comprising a first column and a second column operating at a lower pressure than the first column , the process comprising the steps of:i) compressing all of the feed air in a first compressor up to a first outlet pressure of at most one bar greater than and preferably substantially equal to the pressure of the first column;ii) sending a first part of the air under the first outlet pressure to a second compressor, and compression of the air to a second outlet pressure;iii) cooling and condensation of at least a part of the air under the second outlet pressure in the heat exchanger;iv) sending an air gas flow under the first outlet pressure to the system of columns, without more forceful compression, and separation of the air in the system of columns;v) withdrawing the liquid from the system of columns, pressurizing the liquid and vaporizing the ...

METHODS AND CONFIGURATION FOR RETROFITTING NGL PLANT FOR HIGH ETHANE RECOVERY

A natural gas liquid plant is retrofitted with a bolt-on unit that includes an absorber that is coupled to an existing demethanizer by refrigeration produced at least in part by compression and expansion of the residue gas, wherein ethane recovery can be increased to at least 99% and propane recovery is at least 99%, and where a lower ethane recovery of 96% is required, the bolt-on unit does not require the absorber, which could be optimum solution for revamping an existing facility. Contemplated configurations are especially advantageous to be used as bolt-on upgrades to existing plants. 1. A natural gas liquid plant bolt-on unit , comprising:an absorber configured to condense an ethane content from an overhead gas stream from a demethanizer using a cold lean residue gas to produce a liquid portion and a vapor portion, wherein the demethanizer is configured to receive the liquid portion as a first reflux;a reflux exchanger and a subcooler, wherein the reflux exchanger and the subcooler are configured to receive the vapor portion and use the vapor portion to provide cooling within the reflux exchanger and the subcooler; anda flow control valve configured to direct between about 70% to 90% of the vapor portion to: 1) reflux cooling, and 2) a second reflux of the demethanizer in the subcooler.2. The natural gas liquid plant bolt-on unit of claim 1 , wherein the overhead gas is at a pressure between about 250 psig to about 350 psig.3. The natural gas liquid plant bolt-on unit of claim 1 , wherein the absorber and the reflux exchanger are fluidly coupled to a residue gas compressor and the demethanizer claim 1 , and wherein the natural gas liquid plant is configured to provide at least a 99% ethane recovery.4. The natural gas liquid plant bolt-on unit of claim 1 , further comprising a reduction device comprising a Joule-Thompson valve claim 1 , wherein the reduction device is configured to receive the liquid portion and expand the liquid portion prior to the liquid ...

Methods and apparatus for liquefaction of natural gas

A liquefaction unit that may include a first treating unit, a second treating unit, a liquefaction heat exchanger, a changeover unit, a liquid nitrogen tank, an LNG product storage tank, and a pressure build unit. During a first operating phase, the associated piping defines a first operating phase flow path for natural gas from the natural gas inlet stream to the first treating unit to the liquefaction unit to the LNG product stream, and a first operating phase flow path for nitrogen from the liquid nitrogen stream to the liquefaction unit to the second treating unit. During a second operating phase, the associated piping defines a second operating phase flow path for natural gas from the natural gas inlet stream to the second treating unit to the liquefaction unit to the LNG product stream, and a first operating phase flow path for nitrogen from the liquid nitrogen stream to the liquefaction unit to the first treating unit. During a changeover operating phase, the associated piping defines a changeover flow path for the natural gas from the natural gas inlet stream to the changeover treating unit to the liquefaction unit to the LNG product stream.

METHOD FOR SEPARATING A SYNTHESIS GAS

A method for separating a synthesis gas containing carbon monoxide and hydrogen including compressing a flow of synthesis gas received from a source of synthesis gas in a compressor, purifying the compressed synthesis gas in a purification unit to purify it of water and/or carbon dioxide, cooling the compressed and purified flow of synthesis gas, separating the cooled flow of synthesis gas by washing and/or distillation at a cryogenic temperature and optionally by adsorption in a separating unit, and producing at least the following three gases in the separating unit: a carbon monoxide-enriched gas, a hydrogen-enriched gas, a residual gas containing carbon monoxide and hydrogen that is less pure with respect to carbon monoxide than the carbon monoxide-enriched gas and less pure with respect to hydrogen than the hydrogen-enriched gas. 115.-. (canceled)16. A method for separating a synthesis gas containing carbon monoxide and hydrogen comprising:i) compressing a flow of synthesis gas received from a source of synthesis gas in a compressor,ii) purifying the compressed synthesis gas in a purification unit to purify it of water and/or carbon dioxide,iii) cooling the compressed and purified flow of synthesis gas,iv) separating the cooled flow of synthesis gas by washing and/or distillation at a cryogenic temperature and optionally by adsorption in a separating unit, andv) producing at least the following three gases in the separating unit: a carbon monoxide-enriched gas, a hydrogen-enriched gas, a residual gas containing carbon monoxide and hydrogen that is less pure with respect to carbon monoxide than the carbon monoxide-enriched gas and less pure with respect to hydrogen than the hydrogen-enriched gas and optionally also a methane-enriched gas, and/or a nitrogen-enriched gas, andvi) sending at least one part of each of the following gases downstream of the source, only if the flow of synthesis gas received from the source and sent to the compressor is below a threshold ...

SYSTEM AND METHOD FOR ENHANCED RECOVERY OF ARGON AND OXYGEN FROM A NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT

A moderate pressure air separation unit and air separation cycle is disclosed that provides for up to about 96% recovery of argon, an overall nitrogen recovery of 98 percent or greater and limited gaseous oxygen production. The air separation is configured to produce a first high purity oxygen enriched stream and a second lower purity oxygen enriched stream from the lower pressure column, one of which is used as the refrigerant to condense the argon in the argon condenser, with the resulting vaporized oxygen stream used to regenerate the temperature swing adsorption pre-purifier unit. All or a portion of the first high purity oxygen enriched stream is vaporized in the main heat exchanger to produce the gaseous oxygen products. 121-. canceled22. An air separation unit comprising:a main air compression system configured for receiving a stream of incoming feed air and producing a compressed air stream;an adsorption based pre-purifier unit configured for removing water vapor, carbon dioxide, nitrous oxide, and hydrocarbons from the compressed air stream and producing a compressed and purified air stream, wherein the compressed and purified air stream is split into at least a boiler air stream and a turbine air stream;a distillation column system having a higher pressure column and a lower pressure column linked in a heat transfer relationship via a condenser-reboiler, the distillation column system further includes an argon column arrangement operatively coupled with the lower pressure column, the argon column arrangement having at least one argon column and an argon condenser;a main heat exchange system configured to cool the boiler air stream against a pumped oxygen stream received from the distillation column system to produce a cooled boiler air stream that is directed to the distillation column system and a gaseous oxygen product stream;a turboexpander arrangement configured to expand the turbine air stream to form an exhaust stream;the distillation column system ...

Argon production method and apparatus

A method and apparatus for producing a purified liquid argon product in which liquid argon having oxygen impurities is produced in a cryogenic air separation plant by separating argon from oxygen within an argon column. An impure liquid argon stream, composed of part of the liquid argon, is purified in an adsorbent bed by adsorbing the oxygen impurities in an adsorbent to produce a purified liquid argon stream that constitutes the purified liquid argon product. During adsorption, the adsorbent bed is maintained at a reduced temperature with a coolant to prevent vaporization of the liquid argon. The bed is then regenerated by draining residual liquid argon from the adsorbent bed, introducing the residual liquid argon back into the air separation plant and then desorbing the oxygen impurities with a regeneration gas. After regeneration, the adsorbent bed is refilled with purified liquid argon prior to being brought back on-line.

CARBON DIOXIDE RECOVERY METHOD AND RECOVERY APPARATUS

The carbon dioxide recovery apparatus has a dryer having a hygroscopic agent for drying a gas, and a separator for separating carbon dioxide from the gas dried by the dryer and discharging a residual gas from which carbon dioxide has been separated. The recovery apparatus further includes an introduction part for introducing a regeneration gas from outside for regenerating the hygroscopic agent, a regeneration system capable of supplying one of the regeneration gas introduced from the introduction part and the residual gas discharged from the separator to the dryer, and a switching mechanism for switching supply by the regeneration system between the regeneration gas and the residual gas in response to regeneration of the hygroscopic agent. 1. A carbon dioxide recovery apparatus , comprising:a dryer having a hygroscopic agent for drying a gas;a separator which separates carbon dioxide from the gas dried by the dryer and discharges a residual gas from which carbon dioxide has been separated;an introduction part which introduces from outside a regeneration gas for regenerating the hygroscopic agent;a regeneration system capable of supplying one of the regeneration gas introduced from the introduction part and the residual gas discharged from the separator, to the dryer; anda switching mechanism which switches supply by the regeneration system between the regeneration gas and the residual gas in response to regeneration of the hygroscopic agent.2. The carbon dioxide recovery apparatus according to claim 1 , further comprising:a recirculating system capable of supplying the residual gas discharged from the separator to the gas to be supplied to the separator,wherein the switching mechanism switches supply by the recirculating system so that the residual gas is supplied to the gas to be supplied to the separator while the regeneration gas is supplied to the dryer by the regeneration system.3. The carbon dioxide recovery apparatus according to claim 1 , wherein the ...

MODIFIED GOSWAMI CYCLE BASED CONVERSION OF GAS PROCESSING PLANT WASTE HEAT INTO POWER AND COOLING

A system includes a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant. The system includes a modified Goswami cycle energy conversion system including a first group of heat exchangers configured to heat a first portion of a working fluid by exchange with the heated heating fluid stream and a second group of heat exchangers configured to heat a second portion of the working fluid. The modified Goswami cycle energy conversion system includes a separator configured to receive the heated first and second portions of the working fluid and to output a vapor stream of the working fluid and a liquid stream of the working fluid; a first turbine and a generator are configured to generate power by expansion of a first portion of the vapor stream of the working fluid; a cooling subsystem including one or more cooling elements configured to cool a chilling fluid stream by exchange with a cooled second portion of the vapor stream of the working fluid; and a second turbine configured to generate power from the liquid stream of the working fluid. 1. (canceled)2. A system comprising:a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant; and a first energy conversion heat exchanger configured to heat a first portion of a working fluid by exchange with the heated heating fluid stream;', 'a second group of energy conversion heat exchangers configured to heat a second portion of the working fluid by exchange with (i) a liquid stream of the working fluid and (ii) the heated heating fluid stream;', 'a separator configured to receive the heated first and second portions of the working fluid and to output a vapor stream of the working fluid and the liquid stream of the working fluid;', 'a turbine subsystem configured to generate power from one or more of (i) a first portion of the vapor ...

METHOD AND SYSTEM FOR OBTAINING HYDROGEN FROM A FEED MIXTURE WHICH CONTAINS HYDROGEN AND HYDROCARBONS

A method () is proposed for obtaining hydrogen from a gaseous feed mixture rich in hydrogen, methane and hydrocarbons having two carbon atoms, wherein fluid of the feed mixture is cooled from a first temperature level to a second temperature level at a first pressure level such that one or more condensates are precipitated out of the fluid of the feed mixture, leaving a residual gas, fluid of the residual gas is further cooled to a third temperature level and subjected to a counterflow absorption at the first pressure level, thereby obtaining a top gas rich in hydrogen and methane and a sump liquid, fluid of the top gas is heated and subjected to pressure swing adsorption () at the first pressure level, to form a product stream which is rich in hydrogen and depleted in or free from methane, and fluid of the condensate or condensates and/or of the sump liquid is expanded from the first pressure level to a second pressure level and is fed into a low pressure demethanizer at the second pressure level. It is provided that the counterflow absorption is carried out using fluid which is taken from the low pressure demethanizer at the second pressure level, compressed in gaseous form to the first pressure level and cooled to the third temperature level. The invention also relates to a corresponding apparatus. 2100200. Method ( claim 1 , ) according to claim 1 , wherein the feed mixture contains 55 to 90 claim 1 , particularly 60 to 90 claim 1 , mol % of methane.3100200. Method ( claim 2 , ) according to claim 2 , wherein the fluid taken from the low pressure demethanizer and used in the counterflow absorption predominantly or exclusively contains methane and is used as liquid reflux in the counterflow absorption.4100200. Method ( claim 1 , ) according to claim 1 , wherein the feed mixture contains 30 to 55 claim 1 , particularly 30 to 40 claim 1 , mol % of methane.5100200. Method ( claim 5 , ) according to claim 5 , wherein the fluid taken from the low pressure demethanizer ...

Process integration for natural gas liquid recovery

This specification relates to operating industrial facilities, for example, crude oil refining facilities or other industrial facilities that include operating plants that process natural gas or recover natural gas liquids.

PROCESS INTEGRATION FOR NATURAL GAS LIQUID RECOVERY

This specification relates to operating industrial facilities, for example, crude oil refining facilities or other industrial facilities that include operating plants that process natural gas or recover natural gas liquids. 1. A method for recovering natural gas liquid from a feed gas , the method comprising:transferring heat from a plurality of hot fluids to a plurality of cold fluids through a cold box, the cold box comprising a plate-fin heat exchanger comprising a plurality of compartments; and a primary refrigerant comprising a first mixture of hydrocarbons;', 'a low pressure (LP) refrigerant separator in fluid communication with the cold box;', 'a high pressure (HP) refrigerant separator in fluid communication with the cold box; and', 'a subcooler in fluid communication with the cold box;, 'transferring heat to a refrigeration system through the cold box, the refrigeration system comprisingflowing a first portion of the primary refrigerant to the LP refrigerant separator;separating the first portion of the primary refrigerant into a LP primary refrigerant liquid phase and a LP primary refrigerant vapor phase using the LP refrigerant separator;transferring heat from the first portion of the primary refrigerant to the LP primary refrigerant vapor phase using the subcooler;flowing the first portion of the primary refrigerant from the subcooler to the cold box;flowing at least a portion of the LP primary refrigerant liquid phase to the cold box;flowing a second portion of the primary refrigerant to the HP refrigerant separator;separating the second portion of the primary refrigerant into a HP primary refrigerant liquid phase and a HP primary refrigerant vapor phase using the HP refrigerant separator;flowing at least a portion of the HP primary refrigerant liquid phase to the cold box;flowing, to a de-methanizer column in fluid communication with the cold box, at least one hydrocarbon stream originating from the feed gas;separating, using the de-methanizer column, ...

Argon production method and apparatus

A method and apparatus for producing a purified liquid argon product in which liquid argon having oxygen impurities is produced in a cryogenic air separation plant by separating argon from oxygen within an argon column. An impure liquid argon stream, composed of part of the liquid argon, is purified in an adsorbent bed by adsorbing the oxygen impurities in an adsorbent to produce a purified liquid argon stream that constitutes the purified liquid argon product. During adsorption, the adsorbent bed is maintained at a reduced temperature with a coolant to prevent vaporization of the liquid argon. The bed is then regenerated by draining residual liquid argon from the adsorbent bed, introducing the residual liquid argon back into the air separation plant and then desorbing the oxygen impurities with a regeneration gas. After regeneration, the adsorbent bed is refilled with purified liquid argon prior to being brought back on-line.

Separation Process and Apparatus for Light Noble Gas

Process and apparatus for producing helium, neon, or argon product gas using an adsorption separation unit having minimal dead end volumes. A second separation unit receives a stream enriched in helium, neon, or argon, and a stream is recycled from the second separation unit back to the adsorption separation unit in a controlled manner to maintain the concentration of the helium, neon, or argon in the feed to the separation unit within a targeted range.

PROCESS AND APPARATUS FOR PROCESSING A HYDROCARBON GAS STREAM

A process for separating a mixed or raw gas feed to produce a dry gas product and a hydrocarbon liquid product is provided. The process comprises scrubbing heavier hydrocarbon components from the gas feed to produce a lighter ends gas stream and a heavier ends liquid stream; cooling the lighter ends gas stream and separating the cooled lighter ends gas stream into a cold liquid stream and the dry gas product; and using the cold liquid stream to assist in scrubbing the heavier hydrocarbon components from the gas feed. 1. A process for separating a mixed or raw gas feed including natural gas , refinery gas , and synthetic gas , the gas feed containing methane; Ccomponents , Ccomponents , Ccomponents and heavier hydrocarbon components (C+) into a dry gas product containing a portion of Cand Ccomponents , comprising:(a) scrubbing heavier hydrocarbon components from the gas feed to produce a lighter ends gas stream and a heavier ends liquid stream;(b) cooling the lighter ends gas stream and separating the cooled lighter ends gas stream into a cold liquid stream and the dry gas product; and(c) using the cold liquid stream to assist in scrubbing the heavier hydrocarbon components from the cooled gas feed in step (a).2. The process as claimed in claim 1 , further comprising cooling the gas feed prior to step (a) to reduce energy required in step (b).3. The process as claimed in claim 1 , further comprising:{'sub': 3', '4, '(d) distilling and/or fractionating the heavier ends liquid stream to form a hydrocarbon gas liquid product that contains a desired portion of Cand Ccomponents and an overhead gas stream.'}4. The process as claimed in claim 3 , wherein the overhead gas stream is compressed and the compressed gas stream is combined with the gas feed for further processing.5. The process as claimed in claim 3 , wherein the hydrocarbon gas liquid product comprises the majority of the C+ hydrocarbon components present in the gas feed.6. The process as claimed in claim 3 , ...

SYSTEM AND METHOD FOR FLEXIBLE RECOVERY OF ARGON FROM A CRYOGENIC AIR SEPARATION UNIT

A system and method for flexible production of argon from a cryogenic air separation unit is provided. The cryogenic air separation unit is capable of operating in a ‘no-argon’ or ‘low-argon’ mode when argon demand is low or non-existent and then switching to operating in a ‘high-argon’ mode when argon is needed. The recovery of the argon products from the air separation unit is adjusted by varying the percentages of dirty shelf nitrogen and clean shelf nitrogen in the reflux stream directed to the lower pressure column. The cryogenic air separation unit and associated method also provides an efficient argon production/rejection process that minimizes the power consumption when the cryogenic air separation unit is operating in a ‘no-argon’ or ‘low-argon’ mode yet maintains the capability to produce higher volumes of argon products at full design capacity to meet argon product demands. 1. An air separation unit comprising:a main air compression system configured for producing a compressed and purified air stream, wherein the compressed and purified air stream is split into at least a first part of the compressed and purified air stream and a second part of the compressed and purified air stream;a booster compressor arrangement configured to further compress the first part of the compressed and purified air stream to produce a boosted pressure air stream;a main heat exchange system configured to cool the boosted pressure air stream and to partially cool the second part of the compressed and purified air stream;a turboexpander arrangement configured to expand the partially cooled second part of the compressed and purified air stream to form an exhaust stream,a distillation column system having a higher pressure column and a lower pressure column linked in a heat transfer relationship via a condenser reboiler and an argon column arrangement operatively coupled with the lower pressure column, the distillation column system configured to receive a first portion of the ...

Method and plant for producing ethylene

Proposed is a process for producing ethylene wherein using a dehydrogenation of ethane a process gas containing at least ethane, ethylene and compounds having a lower boiling point than ethane and ethylene is formed, wherein using at least a part of the process gas a separation input is formed and subjected to a low-temperature separation ( 6 ) in which the separation input is cooled and in which one or more condensates are separated from the separation input, wherein the condensate(s) are at least partly subjected to a low-temperature rectification to obtain a gaseous first fraction and a liquid second fraction, wherein the gaseous first fraction contains at least the ethane and the ethylene in a lower proportion than in the separation input and the compounds having a lower boiling point than ethane and ethylene in a higher proportion than in the separation input. It is provided that the first fraction is at least partly subjected to a pressure swing adsorption ( 7 ) by means of which a third fraction containing predominantly or exclusively ethylene and ethane and a fourth fraction containing predominantly or exclusively methane and carbon monoxide are formed. A corresponding plant ( 100 ) likewise forms part of the subject matter of the present invention.

Treatment Of Nitrogen-Rich Natural Gas Streams

Helium can be recovered from nitrogen-rich natural gas at high pressure with low helium loss by cryogenic distillation of the natural gas after pre-treatment of the gas to remove incompatible impurities and then recovery of natural gas liquid (NGL) from the pre-treated gas by distillation. Overall power consumption may be reduced, particularly if the feed to the helium recovery column system is at least substantially condensed by indirect heat exchange against a first portion of nitrogen-enriched bottoms liquid at first pressure, and a second portion of nitrogen-enriched bottoms liquid at a second pressure that is different from the first pressure. 1. A process for recovering helium and natural gas liquid (NGL) from pressurized natural gas comprising methane , Chydrocarbons , helium and at least about 70% nitrogen , said process comprising:extracting said pressurized natural gas from an underground source;pre-treating said pressurized nitrogen-rich natural gas to remove one or more impurities incompatible with the process and produce pre-treated natural gas;cooling said pre-treated natural gas to produce cooled pre-treated natural gas;{'sub': '2+', 'separating said cooled pre-treated natural gas by distillation in an NGL recovery column system to produce NGL and C hydrocarbon-depleted natural gas comprising helium and methane; and'}{'sub': '2+', 'separating said C hydrocarbon-depleted natural gas by distillation in a helium recovery column system to produce helium-enriched overhead vapor and nitrogen-enriched bottoms liquid comprising methane.'}2. The process of comprising separating said nitrogen-enriched bottoms liquid by distillation in a methane recovery column system to produce nitrogen-enriched overhead vapor and methane-enriched bottoms liquid.3. The process of claim 2 , wherein at least a portion of said nitrogen-enriched bottoms liquid is heated and partially vaporized prior to being fed as feed to said methane recovery column system.4. The process of claim ...

PRODUCTION OF HELIUM FROM A GAS STREAM CONTAINING HYDROGEN

The invention relates to a method for producing helium from a source gas stream () including at least helium, methane, nitrogen and hydrogen, comprising at least the following consecutive steps: step a): injecting said source gas stream () into at least one compressor (); step b): eliminating the hydrogen and the methane by reacting the stream () obtained from step a) with oxygen; step c): eliminating at least the impurities from step b) by temperature swing adsorption (TSA); step d): partially condensing the stream () obtained from step c) in order to produce a stream () of liquid nitrogen and a gas stream () comprising mostly helium; step e): purifying the gas stream () obtained from step d) in order to increase the helium content by pressure swing adsorption (PSA) by eliminating the nitrogen and the impurities contained in the gas stream () obtained from step d). 11. A process for producing helium from a source gas stream () comprising at least helium , methane , nitrogen and hydrogen , the process comprising at least the following successive steps:{'b': 1', '3, 'step a): introducing said source gas stream () into at least one compressor ();'}{'b': '4', 'step b): removing hydrogen and methane by reaction of the stream () obtained from step a) with oxygen;'}step c): removing at least the impurities obtained from step b) by temperature swing adsorption (TSA);{'b': 8', '10', '11, 'step d): partially condensing the stream () obtained from step c) so as to produce a liquid nitrogen stream () and a gas stream () predominantly comprising helium;'}{'b': 11', '11, 'step e): purifying the gas stream () obtained from step d) so as to increase the helium content by pressure swing adsorption (PSA) by removing the nitrogen and the impurities contained in the gas stream () obtained from step d).'}21. The process of claim 1 , wherein the source gas stream () comprises from 40% to 95% by volume of nitrogen claim 1 , from 0.05% to 40% by volume of helium claim 1 , from 50 ppmv to ...

System and Method for the Production of Liquefied Natural Gas

A method for producing liquefied natural gas (LNG) and separating natural gas liquids (NGLs) from the LNG is provided. The method may include compressing natural gas to compressed natural gas, removing a non-hydrocarbon from the compressed natural gas, and cooling the compressed natural gas to a cooled, compressed natural gas. The method may also include expanding a first portion and a second portion of the cooled, compressed natural gas in a first expansion element and a second expansion element to generate a first refrigeration stream and a second refrigeration stream, respectively. The method may further include separating a third portion of the cooled, compressed natural gas into a methane lean natural gas fraction containing the NGLs and a methane rich natural gas fraction. The methane rich natural gas fraction may be cooled in a liquefaction assembly with the first and second refrigeration streams to thereby produce the LNG. 1. A method for producing liquefied natural gas from a natural gas source and separating natural gas liquids from the liquefied natural gas produced , comprising:compressing natural gas from the natural gas source in a compression assembly fluidly coupled with the natural gas source to produce a compressed natural gas;removing a non-hydrocarbon from the compressed natural gas in a separator fluidly coupled with the compression assembly;cooling the compressed natural gas to a cooled, compressed natural gas with a cooling assembly in thermal communication with the compression assembly;expanding a first portion of the cooled, compressed natural gas in a first expansion element to generate a first refrigeration stream;expanding a second portion of the cooled, compressed natural gas in a second expansion element to generate a second refrigeration stream;feeding a third portion of the cooled, compressed natural gas to a distillation column of a distillation assembly;separating the third portion of the cooled, compressed natural gas into a ...

Method and apparatus for adsorptive distillation for cryogenic argon/oxygen separation

In a method for separating argon by cryogenic distillation, in which a flow containing argon, oxygen and nitrogen and being more rich in argon than the air is sent to a distillation column, and an argon-rich gas flow is withdrawn at the top of the column, a portion of the argon-rich gas flow is mixed with beads to form a gas mixture containing beads, the beads being capable of adsorbing oxygen in the presence of argon at the column operating temperatures; the portion of the argon-rich gas flow mixed with the beads is condensed and then sent to the top of the column; and a bottom liquid containing beads is withdrawn from the column and treated to remove the beads, the beads removed being regenerated to remove the adsorbed oxygen and being again mixed with the argon-rich gas flow.

Methods for Removal of Moisture from LNG Refrigerant

Methods and systems for removing moisture from refrigerant that use a desiccant-based moisture removal unit can be used in the production of liquid natural gas (LNG). For example, a method can include: compressing a refrigerant; conveying at least a portion of the refrigerant to a moisture removal unit comprising a desiccant to form dehydrated refrigerant; cooling and condensing the dehydrated refrigerant to provide a cooled dehydrated liquid refrigerant; conveying the cooled dehydrated refrigerant to a heat exchanger; and passing a LNG stream rich in methane through the heat exchanger to cool at least part of the LNG stream by indirect heat exchange with the cooled dehydrated refrigerant.

Methods for Removal of Moisture from LNG Refrigerant

Methods and systems for removing moisture from a refrigerant can utilize a desiccant-based system. The methods and systems can be employed in conjunction with a liquid natural gas (LNG) refrigeration circuit in either an online mode or an offline mode. For example, a system for removing moisture from a refrigerant can include: a refrigerant source; a moisture removal unit containing desiccant; and a refrigeration circuit comprising a refrigerant compressor, a refrigerant condenser, and a heat exchanger that are fluidly connected in a loop, wherein the refrigerant source is fluidly coupled to the moisture removal unit to supply a refrigerant from the refrigerant source to the moisture removal unit, and the moisture removal unit is fluidly coupled to the refrigeration circuit to supply the refrigerant from the moisture removal unit to the refrigeration circuit. 1. A system comprising:a refrigerant source;a moisture removal unit containing desiccant;a refrigeration circuit comprising a refrigerant compressor, a refrigerant condenser, and a heat exchanger that are fluidly connected in a loop where the refrigerant compressor is upstream of the refrigerant condenser, the refrigerant condenser is upstream of the heat exchanger, and the heat exchanger is upstream of the refrigerant compressor; andwherein the refrigerant source is fluidly coupled to the moisture removal unit to supply a refrigerant from the refrigerant source to the moisture removal unit, and the moisture removal unit is fluidly coupled to the refrigeration circuit to supply the refrigerant from the moisture removal unit to the refrigeration circuit.2. The system of claim 1 , wherein the moisture removal unit is fluidly coupled to the refrigeration circuit downstream of the heat exchanger.3. The system of claim 1 , wherein the moisture removal unit is removably attached to the refrigeration circuit.4. The system of claim 1 , wherein the refrigerant is a mixed refrigerant.5. The system of claim 4 , wherein ...

NOx Removal Method

The invention relates to mixtures comprising molecular hydrogen, hydrocarbons, and nitrogen oxides; to processes for removing at least a portion of the nitrogen oxides therefrom; to equipment useful in such processes; and to the use of such hydrocarbons for, e.g., chemical manufacturing.

Unit and method for purifying co2 by adsorption

The invention relates to a gas depleted of carbon dioxide produced by distillation, which is separated such as to produce a gas depleted of hydrogen, the gas depleted of hydrogen being used as a regeneration gas of a system for purification by adsorption upstream from the distillation, the composition of the regeneration gas at the intake of the purification system not being in the range of flammability in air.

System and Method for the Production of Liquefied Natural Gas

A system and method for producing liquefied natural gas are provided. The method may include compressing a process stream containing natural gas in a compression assembly to produce a compressed process stream. The method may also include removing non-hydrocarbons from the compressed process stream in a separator, and cooling the compressed process stream with a cooling assembly to thereby produce a cooled, compressed process stream containing natural gas in a supercritical state. The method may further include expanding a first portion and a second portion of the natural gas from the cooled, compressed process stream in a first expansion element and a second expansion element to generate a first refrigeration stream and a second refrigeration stream, respectively. The method may further include cooling the natural gas in the cooled, compressed process stream to a supercritical state with the first and second refrigeration streams to thereby produce the liquefied natural gas.

PLANT AND PROCESS FOR AMMONIA PRODUCTION WITH CRYOGENIC PURIFICATION, AND RELATED METHOD OF REVAMPING

Process for the synthesis of ammonia from a make-up gas containing hydrogen and nitrogen, said process comprising: generation of a synthesis gas () containing hydrogen and nitrogen in a molar ratio lower than 3, inside a front-end section (); a first cryogenic purification, designed to remove nitrogen and raise said molar ratio; conversion of the synthesis gas into ammonia () inside a high-pressure synthesis loop (), with extraction from said loop of a purge stream () containing hydrogen and inert gases; wherein at least a portion of said purge stream () undergoes a further purification in order to recover at least part of the hydrogen contained therein, obtaining at least one stream () containing recovered hydrogen which is recycled to the process. 1. A process for the synthesis of ammonia from a make-up gas containing hydrogen and nitrogen , said process comprising the steps of:production of a synthesis gas containing hydrogen and nitrogen in a molar ratio lower than 3, inside a front-end section;a first cryogenic purification of said synthesis gas, suitable to remove nitrogen and raise the hydrogen/nitrogen molar ratio of said gas to a predetermined value;compression of the purified synthesis gas to a synthesis pressure;conversion of synthesis gas into ammonia inside a synthesis loop, with extraction from said loop of a purge stream containing hydrogen and inert gases; andperforming a second purification of at least one portion of said purge stream, by means of a process suitable to recover at least part of the hydrogen contained therein, with the production of at least one stream containing recovered hydrogen and of at least one waste stream, recycling said at least one stream containing recovered hydrogen to said process, in order to increase the ammonia production.2. The process according to claim 1 , wherein said synthesis gas from the front-end section contains an excess of nitrogen of at least 25% with respect to the hydrogen/nitrogen molar stoichiometric ...

Air compression system and method

An air compression system and method for an air separation plant in which air is compressed in a series of compression stages and a temperature swing adsorption unit adsorbs water vapor and carbon dioxide. The temperature swing adsorption unit is situated at a location of the compression stages such that air pressure upon entry into the adsorbent beds is between about 400 psia and about 600 psia. Each of the adsorbent beds of the unit have a minimum transverse cross-sectional flow area that will set the air velocity of the air to a level below that at which adsorbent bed fluidization would occur. Such operation allows fabrication costs of the adsorbent beds to be reduced because less adsorbent and smaller adsorbent beds are required while power consumption will be at a minimum.

SPLIT FLOW INTEGRATED LNG PRODUCTION (SFI-LNG)

Processes for purifying and liquefying natural gas in conjunction and integration with cryogenic processing natural gas to recover natural gas liquids (NGL) is disclosed. In the process, the natural gas stream to be purified and liquefied is taken from top outlet stream of demethanizer in the cryogenic NGL recovery plant, first purified and then cooled under moderate pressure to condense it as a liquefied natural gas (LNG) product stream. Some of the cooling required for the demethanizer reflux stream is provided by natural gas liquefaction section before supplied to top of the column to serve as reflux. The top outlet stream from the demethanizer preferentially contains up to 3 mole percent of COand the majority of methane and small portion of any hydrocarbon heavier than methane, a split portion of this stream is taken and routed to cryogenic COremoval section, in which a molecular sieve that forms a physical adsorption column is used to extract pure COas a product stream, then purified stream is routed to the liquefaction section where only two stages of coil-wound exchangers with a Semi-C3-MR cycle are used to liquefy natural gas. This present invention process is suited for LNG production in small-scale. This zeolite-based small-scale LNG process can be integrated with the design of any new natural gas facility and the technology can also be retrofitted to existing natural gas liquid (NGL) recovery plants, allowing for co-production of LNG and COwith high purity. 1. A process for removing COfrom a cryogenic gas stream (213° K and cooler) comprising dry sweet methane having a COconcentration of up to 3 mole percent , the process comprising adsorptive carbon dioxide removal on a molecular sieve at a pressure of 1000-2000 kPag , wherein the molecular sieve is a zeolite , to obtain a carbon dioxide product stream and scrubbed natural gas stream , wherein the scrubbed natural gas stream has a carbon dioxide content of less than or equal to 50 part per million.2. The ...

INSTALLATION AND METHOD FOR PRODUCING LIQUEFIED METHANE

A plant for the production of liquefied methane having, arranged in series, a means for the generation of methane from hydrogen and carbon dioxide, a means for drying the gas mixture produced by the methane generation means, a purification means configured to remove carbon dioxide from the gas mixture dried in the drying means, a liquefier configured to liquefy the methane contained in the gas mixture purified in the purification means, and a liquefied gas storage facility configured to store the methane liquefied by the liquefier. 110.-. (canceled)11. A plant for the production of liquefied methane comprising a circuit comprising , arranged in series , a means for the generation of methane from hydrogen and carbon dioxide , a means for drying the gas mixture produced by the methane generation means , a purification means configured to remove carbon dioxide from the gas mixture dried in the drying means , a liquefier configured to liquefy the methane contained in the gas mixture purified in the purification means , and a liquefied gas storage facility configured to store the methane liquefied by the liquefier , the plant being comprising a hydrogen separation device configured in order to remove at least a part of the hydrogen from the fluid mixture produced by the liquefier before entering the storage facility , and wherein the hydrogen separation device comprises a first phase-separating vessel comprising an inlet connected to an outlet of the liquefier , in order to receive the fluid mixture produced by the liquefier , and two outlets respectively connected to a pipe for transfer of liquid to the storage facility and a pipe for transfer of gas to the methane generation means , wherein the hydrogen separation device is connected to the outlet of the liquefier via an expansion valve , the plant being configured to cool the mixture of fluids at the outlet of the liquefier to a temperature lower than the equilibrium temperature of pure methane.12. The plant as ...

PROCESS AND APPARATUS FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

A process comprises a first set of distillation columns and a second set of distillation columns, a low-pressure column of the first set being connected to a column operating at higher pressure of the second set by means of a gas arriving from the top of the column operating at a higher pressure and/or by means of a fluid arriving from the low-pressure column. 113-. (canceled)14. A process for separating air by cryogenic distillation in an apparatus comprising:i) a first set of distillation columns comprising at least a first column operating at a first pressure referred to as high pressure and a second column operating at a second pressure lower than the first pressure, the top of the first column being thermally connected to the bottom of the second column by means of a first reboiler-condenser, a first purification unit and a first heat exchange line; andii) a second set of distillation columns comprising at least a third column operating at a third pressure lower than the first pressure and a fourth column operating at a fourth pressure lower than the first, the second and the third pressures, the top of the third column being thermally connected to the bottom of the fourth column by means of a second reboiler-condenser, a second purification unit and a second heat exchange line,the method comprising the steps of:sending a first compressed air to the first purification unit to produce a first purified air;sending the first purified air from the first purification unit to the first exchange line to produce a first cooled air;sending the first cooled air from the first exchange line to the first column under conditions effective for the rectification of air;sending a second compressed air to the second purification unit to produce a second purified air;sending the second purified air from the second purification unit to the second exchange line to produce a second cooled air;sending the second cooled air from the second exchange line to the third column under ...

Liquid natural gas liquefier utilizing mechanical and liquid nitrogen refrigeration

The present invention relates to a method and system for producing liquefied natural gas (LNG) from a stream of pressurized natural gas which involves a combination of mechanical refrigeration.

METHOD AD APPARATUS FOR ARGON RECOVERY IN A CRYOGENIC AIR SEPARATION UNIT INTEGRATED WITH A PRESSURE SWING ADSORPTION

A method and apparatus for argon recovery in which an impure argon stream is separated from air within a cryogenic air separation unit having an argon rejection column and a reflux type argon condenser disposed internally within the lower pressure column. An impure argon stream is subsequently recovered from the argon rejection column and purified within an integrated adsorbent based argon refining and purification subsystem to produce product grade argon. The waste stream from the adsorbent based argon refining and purification subsystem is recycled back to the argon rejection column so as to improve the argon recovery. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. (canceled)15. (canceled)16. (canceled)17. (canceled)18. (canceled)19. (canceled)20. (canceled)21. A method of producing a purified argon product stream in a cryogenic air separation unit having a higher pressure column , a lower pressure column , an argon column , and an argon condenser , the method comprising the steps of:extracting an oxygen-argon containing stream from an intermediate location of the lower pressure column of the cryogenic air separation unit;separating argon from an oxygen-argon containing stream within the argon column to produce an argon-rich overhead vapor stream and an oxygen rich liquid bottoms stream;condensing at least a portion of the argon-rich overhead vapor stream from the argon column against an oxygen enriched liquid stream to produce the argon-rich reflux stream;directing at least a portion of the oxygen rich liquid bottoms stream to the lower pressure column at a location below the intermediate location;directing at least a portion of the produce the argon-rich reflux stream to the argon column as reflux;producing an impure argon stream by diverting another portion of the argon-rich overhead vapor stream as the impure argon stream from the ...

HYDROGEN-NEON MIXTURE REFRIGERATION CYCLE FOR LARGE-SCALE HYDROGEN COOLING AND LIQUEFACTION

The present invention relates to a refrigerant composition comprising neon and hydrogen. The present invention further relates to the use of the refrigerant composition in liquefying gaseous substances such as hydrogen or helium. 1. Method for liquefying a feed gas stream , said feed gas comprising hydrogen or helium , the method comprising the steps of:{'b': 11', '11, 'providing a feed gas stream () comprising the feed gas, wherein said feed gas stream () has an initial temperature,'}{'b': 11', '12, 'precooling said feed gas stream () from said initial temperature to an intermediate temperature in a precooling step yielding a precooled feed gas stream (),'}{'b': '12', 'cooling said precooled feed gas stream () from said intermediate temperature to a temperature equal to or below the boiling temperature or the critical temperature of said gas,'} [{'b': 12', '21', '21, 'said precooled feed gas stream () is cooled to said temperature equal or below the boiling temperature or the critical temperature of said gas in a first cooling step with a first refrigerant stream (), wherein said first refrigerant stream () is expanded, thereby producing cold, or'}, {'b': 12', '21', '21, 'said precooled feed gas stream () is cooled to a first temperature in a first cooling step with a first refrigerant stream (), wherein said first refrigerant stream () is expanded, thereby producing cold, and'}, {'b': 13', '31', '31, 'said cooled feed gas stream () is further cooled from said first temperature to said temperature equal to or below the boiling temperature or critical temperature of said gas in a second cooling step with a second refrigerant stream (), wherein said second refrigerant stream () is expanded, thereby producing cold,'}], 'wherein'}{'b': 21', '31, 'wherein said first refrigerant stream () and/or said second refrigerant stream () comprises or consists of a refrigerant composition comprising neon and hydrogen.'}2. The method according to claim 1 , wherein said feed gas is ...

Process and device for the combined production of hydrogen and carbon dioxide from a hydrocarbon mixture

The invention relates to a process for the combined production of hydrogen and carbon dioxide from a hydrocarbon mixture, in which the residual gas of a PSA H 2 ( 12 ) is separated by permeation in order to reduce the hydrocarbon content thereof and the hydrocarbon-purified gas is separated at a low temperature to produce a carbon dioxide-rich liquid ( 22 ).

METHOD AND APPARATUS FOR SEPARATING A SYNTHESIS GAS

In a method for separating a synthesis gas containing carbon monoxide and hydrogen, a synthesis gas flow from a synthesis gas source is compressed in a compressor and separated into at least three gaseous products. If there is insufficient synthesis gas, at least three separation products are recycled in the compressor in order to separate said products. 115-. (canceled)16. A method for separating a synthesis gas containing carbon monoxide and hydrogen wherein:i) compressing a synthesis gas flow originating from a synthesis gas source in a compressor;ii) purifying the compressed synthesis gas in a purification unit to remove water and/or carbon dioxide;iii) cooling the compressed purified synthesis gas flow;iv) separating the cooled synthesis gas flow by a separation process selected from the group consisting of scrubbing, distillation at a cryogenic temperature, adsorption in a separation unit, and combinations thereof; andv) producing at least the following three gases in the separation unit: a carbon monoxide-enriched gas, a hydrogen-enriched gas, a residual gas containing carbon monoxide and hydrogen which contains less carbon monoxide than the carbon monoxide-enriched gas and less hydrogen than the hydrogen-enriched gas,wherein only if the synthesis gas flow passed to the compressor is below a threshold or zero, at least a portion of at least two the gases selected from the group consisting of the carbon monoxide-enriched gas, the hydrogen-enriched gas, the residual gas, and combinations thereof, are introduced at a location downstream of the source and upstream of the purification unit.17. The method as claimed in claim 16 , wherein:a) the compressed synthesis gas is stored while the flow of synthesis gas is above the threshold; andb) at least a portion of the compressed synthesis gas and at least a portion of at least each of the first three gases from stage v) are passed downstream of the source to be purified in the purification unit and separated in the ...

PROCESS FOR CRYOGENIC SEPARATION OF A FEED STREAM CONTAINING METHANE AND AIR GASES, FACILITY FOR PRODUCING BIOMETHANE BY PURIFICATION OF BIOGASES DERIVED FROM NON-HAZARDOUS WASTE STORAGE FACILITIES (NHWSF) IMPLEMENTING THE PROCESS

A process for cryogenic separation of a feed stream containing methane and air gases in which: the feed stream is cooled in order to produce a cooled stream, at least one portion of the cooled stream is sent to one level of a distillation column, a bottom stream is drawn off from the distillation column, the bottom stream being enriched in methane relative to the feed stream, a stream enriched in oxygen and in nitrogen relative to the feed stream is drawn off from the distillation column, at least one noncombustible dilution stream that is more volatile than oxygen is introduced into the distillation column at at least one level lower than the one at which the cooled stream is introduced. The dilution stream is extracted from the feed stream. Facility for producing biomethane by purification of biogases derived from non-hazardous waste storage facilities (NHWSF) implementing the process. 1. A cryogenic separation process for a feed stream containing methane and air gases comprising nitrogen and oxygen wherein:the feed stream is cooled to produce a cooled stream;the cooled stream is at least partially condensed;at least a portion of the at least partially condensed cooled stream is sent to a level of a distillation column;a bottom stream is drawn off from the distillation column, where the bottom stream is enriched in methane compared to the feed stream;a stream enriched in oxygen and nitrogen compared to the feed stream is drawn off from the distillation column, wherein:the at least partially condensed cooled stream is decompressed;at least one dilution stream is produced by separation of the gas fraction produced at the outlet of the decompression;the at least one dilution stream, which is incombustible and more volatile than oxygen, is added to the distillation column at least one level below the level at which the cooled stream is added.2. (canceled)3. The process according to claim 1 , wherein a column head of the distillation column is cooled by cooling the ...

Apparatus and System for Swing Adsorption Processes

Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve performing a startup mode process prior to beginning a normal operation mode process to remove contaminants from a gaseous feed stream. The startup mode process may be utilized for swing adsorption processes, such as TSA and/or PSA, which are utilized to remove one or more contaminants from a gaseous feed stream.

Device and method for purifying a gas mixture

Device and method for purifying a gas mixture to produce a concentrated gas, notably neon, starting from a mixture comprising neon, said device including, in a cold box housing a cryogenic purification circuit comprising, in series, at least one unit for purifying the mixture by cryogenic adsorption at a temperature between 65K and 100K and notably 65K, then a unit for cooling the mixture to a temperature between 25 and 65 K and then a unit for cryogenic distillation of the mixture to produce the concentrated liquid at the outlet of the cryogenic distillation unit, characterized in that the unit for cooling the mixture to a temperature between 25 and 65 K comprises at least one cryocooler that extracts thermal power from the mixture via a heat exchanger.

SYSTEM AND METHOD FOR ENHANCED RECOVERY OF ARGON AND OXYGEN FROM A NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT

A moderate pressure air separation unit and air separation cycle is disclosed that provides for up to about 96% recovery of argon, an overall nitrogen recovery of 98 percent or greater and limited gaseous oxygen production. The air separation is configured to produce a first high purity oxygen enriched stream and a second lower purity oxygen enriched stream from the lower pressure column, one of which is used as the refrigerant to condense the argon in the argon condenser, with the resulting vaporized oxygen stream used to regenerate the temperature swing adsorption pre-purifier unit. All or a portion of the first high purity oxygen enriched stream is vaporized in the main heat exchanger to produce the gaseous oxygen products.

System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit

A moderate pressure air separation unit and air separation cycle is disclosed that provides for up to about 96% recovery of argon, an overall nitrogen recovery of 98% or greater and limited gaseous oxygen production. The air separation is configured to produce a first high purity oxygen enriched stream and a second lower purity oxygen enriched stream from the lower pressure column, one of which is used as the refrigerant to condense the argon in the argon condenser, with the resulting vaporized oxygen stream used to regenerate the temperature swing adsorption pre-purifier unit. All or a portion of the first high purity oxygen enriched stream is vaporized in the main heat exchanger to produce the gaseous oxygen products.

PROCESS FOR LIQUEFYING NATURAL GAS AND CARBON DIOXIDE

A process for producing liquefied natural gas () and liquid carbon dioxide (CO) () comprising at least the following steps: Step a): separating a natural gas feed gas (), containing hydrocarbons and carbon dioxide in a treatment unit (), into a CO-enriched gas stream () and a CO-depleted natural gas stream (); step b): liquefying the CO-depleted natural gas stream () resulting from step a) in a natural gas liquefaction unit () comprising at least a main heat exchanger () and a system () for producing frigories; step c): simultaneous liquefying of the CO-enriched gas stream () resulting from step a) in a COliquefaction unit (); characterized in that all of the refrigeration necessary for the liquefaction of the CO-enriched gas stream () and for the liquefaction of the natural gas is supplied by said frigorie-producing system () of the natural gas liquefaction unit (). 1. A process for producing liquefied natural gas) and liquid carbon dioxide (CO) comprising the following steps:{'sub': 2', '2, 'Step a): separating a natural gas feed gas, containing hydrocarbons and carbon dioxide in a treatment unit, into a CO-enriched gas stream and a CO-depleted natural gas stream;'}{'sub': '2', 'Step b): liquefying the CO-depleted natural gas stream resulting from step a) in a natural gas liquefaction unit comprising at least a main heat exchanger and a system for producing frigories;'}{'sub': 2', '2, 'Step c): simultaneous liquefying of the CO-enriched gas stream resulting from step a) in a COliquefaction unit;'}{'sub': 2', '2, 'wherein all or some of the refrigeration necessary for the liquefaction of the CO-enriched gas stream and for the liquefaction of the natural gas is supplied by said frigorie-producing system of the natural gas liquefaction unit); and wherein the CO-enriched gas stream resulting from step a) is purified prior to step c), the refrigeration necessary for this purification being provided by said frigorie-producing system of the natural gas liquefaction unit ...

HELIUM ENHANCED HEAT TRANSFER IN ADSORPTIVE LIQUID ARGON PURIFICATION PROCESS

The present invention generally relates to a method to enhance heat transfer in the temperature swing adsorption process (TSA) and to an intensified TSA process for gas/liquid purification or bulk separation. Helium is designed as the heat carrier media to directly bring heat/cool to the adsorbent bed during the TSA cycling process. With helium's superior heat conductivity, the time consuming regeneration steps (warming, regeneration and precooling) of TSA process can be significantly reduced and allowing for the TSA process to be intensified. 1. A method of intensifying a temperature swing adsorption process which comprises at least one adsorbent bed , wherein said method comprises maintaining said adsorbent bed in an environment of at least one heat transfer gas during the cooling of said adsorbent bed to cryogenic temperatures , wherein said heat transfer gas has a thermal conductivity value greater than or equal to 2.0 mW/m K measured at a temperature of 100K.2. The method of wherein said at least one heat transfer gas accelerates the cooling of said at least one adsorbent bed through conductive heat transfer claim 1 , convective heat transfer claim 1 , or both conductive and convective heat transfer.3. The method of wherein said at least one heat transfer gas comprises at least one of helium claim 1 , hydrogen claim 1 , neon claim 1 , krypton claim 1 , xenon claim 1 , or combinations and mixtures thereof.4. The method of wherein said heat transfer gas comprises helium.5. The method of wherein said adsorbent bed is located in an adsorbent vessel comprising an outer jacket for cooling media and an inner vessel containing said adsorbent bed claim 1 , wherein said cooling media indirectly cools down the adsorbent bed in said inner vessel claim 1 , wherein helium is loaded into said inner vessel in an amount effective to substantially fill the void space of said inner vessel during the indirect cooling of said adsorbent bed.6. The method of wherein the cooling media ...

METHOD FOR SYNTHESIS GAS PURIFICATION

The present invention relates to an integrated method and apparatus for providing a synthesis gas to a cryogenic separation unit installed for separating synthesis gas into products selected from carbon monoxide, crude hydrogen, methane-rich fuel and syngas with a particular H:CO ratio. More specifically, the invention relates to the purification of synthesis gas routed to a downstream cryogenic separation unit and minimizing temperature disturbances in the separation unit. 1. A continuous purification method of a synthesis gas stream obtained from a pre-purification unit to remove substantially all HO and COprior to routing the synthesis gas product stream to a downstream cryogenic separation unit comprising:{'sub': 2', '2', '2', '2', '2', '2, 'supplying a synthesis gas feed stream to a synthesis gas purification unit comprised of at least two adsorbent beds undergoing a temperature swing adsorption (TSA) cycle where each bed undergoes at least two phases: (1) a feed phase for producing a synthesis gas product stream substantially free of HO and COby adsorbing these components on the adsorbent bed and (2) a regeneration phase to desorb HO and COfrom the adsorbent bed using a regeneration gas and routing the HO and CO-laden regeneration gas to upstream of the pre-purification unit, where said regeneration gas is formed by routing a regeneration portion of the synthesis gas product stream through a compressor, and the regeneration phase of the TSA cycle comprising multiple steps includinga pressurization step to increase the pressure of the adsorbent bed to be regenerated in a controlled manner using the regeneration gas;{'sub': 2', '2, 'a heating step to heat the regeneration gas in a heater and supplying it to the adsorbent bed to remove HO and COfrom the adsorbent bed;'}a first cooling step in which heat addition to the heater stops while continuing the flow of the regeneration gas through the heater and the adsorbent bed;a second cooling step to cool the ...

Impurity Control For A High Pressure CO2 Purification And Supply System

An apparatus for producing a purified, pressurized liquid carbon dioxide stream includes a distillation column (B) having packing (C) therein and a sump (D) below the packing, the distillation column in fluid communication with the liquid carbon dioxide supply tank for receiving the liquid carbon dioxide stream and the packing stripping volatile impurities from the liquid carbon dioxide stream; a heater (E) in contact with the liquid carbon dioxide stream in the sump (D) for vaporizing the liquid carbon dioxide stream in the sump; a vent in the distillation column (B) from which a first vaporized portion (G) of carbon dioxide vapor in the sump (D) is withdrawn from the distillation column: and a conduit (I) in fluid communication with the sump (D) and from which a second vaporized portion (H) of the carbon dioxide vapor in the sump is withdrawn into the conduit (I) to be introduced into the carbon dioxide vapor feed stream. 1101314182030203130453010513018. In an apparatus for producing a purified , pressurized liquid carbon dioxide stream , including a liquid carbon dioxide supply tank () for distilling off a feed stream comprising carbon dioxide vapor , at least one purifying filter ( ,) for purifying the carbon dioxide vapor feed stream , a condenser () for condensing the carbon dioxide vapor feed stream into an intermediate liquid carbon dioxide stream , a receiver () for accumulating the intermediate liquid carbon dioxide stream , a high-pressure accumulation chamber () for accepting the intermediate liquid carbon dioxide stream from the receiver () , a heater () for heating the high-pressure accumulation chamber () for pressurizing the carbon dioxide liquid contained therein to a delivery pressure , a sensor () for detecting when the high-pressure accumulation chamber () requires replenishment of liquid carbon dioxide () , a flow network having conduits connecting the bulk supply tank , the condenser , the receiver and the high-pressure accumulation chamber and ...

Impurity Control For A High Pressure CO2 Purification And Supply System

A batch process for producing a purified, pressurized liquid carbon dioxide stream, includes withdrawing a liquid carbon dioxide stream (A) from a liquid carbon dioxide supply (); introducing the liquid carbon dioxide stream (A) into a distillation column (B) having packing (C) therein, and stripping volatile impurities from the liquid carbon dioxide stream with the packing; vaporizing the liquid carbon dioxide stream (A) in a sump (D) of the distillation column (B) for providing a carbon dioxide vapor; withdrawing from a vaporized portion (F) of carbon dioxide vapor in the sump (D) a first vapor stream (G) vented from the distillation column (B); withdrawing from the vaporized portion (F) of the carbon dioxide vapor in the sump (D) a second vapor portion (H) vented from the sump into a conduit (I); and introducing the second vapor portion (H) in the conduit (I) into a carbon dioxide vapor feed stream. 1101314182030303030. In a batch process for producing a purified , pressurized liquid carbon dioxide stream including providing a liquid carbon dioxide supply () , introducing a carbon dioxide vapor feed stream into at least one purifying filter ( ,) , condensing the purified vapor feed stream within a condenser () to form an intermediate liquid carbon dioxide stream , accumulating the intermediate liquid carbon dioxide stream in a receiver () , introducing the intermediate liquid carbon dioxide stream into at least on high-pressure accumulation chamber () , heating the high pressure accumulation chamber () to pressurize the intermediate liquid carbon dioxide stream contained therein to a delivery pressure , delivering a pressurized liquid carbon dioxide stream from the high-pressure accumulation chamber () , and discontinuing delivery of the pressurized liquid carbon dioxide stream for replenishing the high pressure accumulation chamber () , wherein the improvement comprises:{'b': '10', 'withdrawing a liquid carbon dioxide stream (A) from the liquid carbon dioxide ...

ADSORPTIVE XENON RECOVERY PROCESS FROM A GAS OR LIQUID STREAM AT CRYOGENIC TEMPERATURE

The present invention relates to an adsorption process for xenon recovery from a cryogenic liquid or gas stream wherein a bed of adsorbent is contacted with a xenon-containing liquid or gas stream selectively adsorbing the xenon from said stream. The adsorption bed is operated to at least near full breakthrough with xenon to enable a deep rejection of other stream components, prior to regeneration using the temperature swing method. After the stripping step, the xenon adsorbent bed is drained to clear out the liquid residue left in the nonselective void space and the xenon molecules in those void spaces is recycled upstream to the ASU distillation column for increasing xenon recovery. The xenon adsorbent bed is optionally purged with oxygen, followed by purging with gaseous argon at cryogenic temperature (≤160 K) to displace the oxygen co-adsorbed on the AgX adsorbent due to higher selectivity of argon over oxygen on the AgX adsorbent. By the end of this step, the xenon adsorbent bed is filled with argon and xenon. Then the entire adsorbent bed is heated indirectly without utilizing any of the purge gas for direct heating. Operating the adsorption bed to near full breakthrough with xenon and displacing the adsorbed oxygen and other residues with argon, prior to regeneration, along with indirect heating of the bed, enables production of a high purity product ≥40 vol % xenon from the adsorption bed and further enables safely heating without any purge gas and ease for downstream product collection, even in cases where hydrocarbons are co-present in the feed stream. 1. An adsorption process for the recovery of xenon from a liquid or gas cryogenic feed stream comprising xenon and at least one other adsorbable component which comprises:i. feeding the feed stream at cryogenic temperatures into the inlet of an adsorption vessel containing an adsorbent bed loaded with at least one adsorbent selective for xenon, wherein said adsorbent bed has an inlet and an outlet,ii. ...

Apparatus and System For Swing Adsorption Processes

Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve performing a startup mode process prior to beginning a normal operation mode process to remove contaminants from a gaseous feed stream. The startup mode process may be utilized for swing adsorption processes, such as TSA and/or PSA, which are utilized to remove one or more contaminants from a gaseous feed stream. 1. A cyclical swing adsorption system comprising:a plurality of manifolds, wherein the plurality of manifolds comprise a feed manifold configured to pass a gaseous feed stream to the plurality of adsorbent bed units during an adsorption step, a product manifold configured to pass a product stream from the plurality of adsorbent bed units during the adsorption step, a purge manifold configured to pass a purge stream to the plurality of adsorbent bed units during a regeneration step, a purge product manifold configured to pass a purge product stream from the plurality of adsorbent bed units during the regeneration step,each manifold of the plurality of manifolds is associated with one swing adsorption process step of a plurality of swing adsorption process steps; a housing;', 'an adsorbent material disposed within the housing;', 'a plurality of valves, wherein at least one of the plurality of valves is associated with one of the plurality of manifolds and is configured to manage fluid flow along a flow path extending between the respective manifold and the adsorbent material;, 'a plurality of adsorbent bed units coupled to the plurality of manifolds, each of the adsorbent bed units comprisingan external gas bypass valve in fluid communication with purge manifold and configured to provide a flow passage for an external gas stream from an external gas storage vessel to the purge manifold in a startup mode position and configured to block the flow passage of the external gas stream from the external gas storage vessel to the purge manifold in a ...

Recovery of olefin monomers

In a process for the production of a polyolefin, an olefin monomer is polymerised said polyolefin and residual monomer is recovered. A gas stream comprising the monomer and nitrogen is subjected to a PSA process in which said monomer is adsorbed on a periodically regenerated silica gel or alumina adsorbent to recover a purified gas stream containing said olefin and a nitrogen rich stream containing no less than 99% nitrogen and containing no less than 50% of the nitrogen content of the gas feed to the PSA process.

Recovery of olefin monomers

In a process for the production of a polyolefin, an olefin monomer is polymerised said polyolefin and residual monomer is recovered. A gas stream comprising the monomer and nitrogen is subjected to a PSA process in which said monomer is adsorbed on a periodically regenerated silica gel or alumina adsorbent to recover a purified gas stream containing said olefin and a nitrogen rich stream containing no less than 99% nitrogen and containing no less than 50% of the nitrogen content of the gas feed to the PSA process.

Recovery of olefin monomers

In a process for the production of a polyolefin, an olefin monomer is polymerised said polyolefin and residual monomer is recovered. A gas stream comprising the monomer and nitrogen is subjected to a PSA process in which said monomer is adsorbed on a periodically regenerated silica gel or alumina adsorbent to recover a purified gas stream containing said olefin and a nitrogen rich stream containing no less than 99% nitrogen and containing no less than 50% of the nitrogen content of the gas feed to the PSA process.

Process

一种全温程变压吸附气体分离提纯与净化的方法

本发明公开一种全温程变压吸附气体分离提纯与净化的方法，利用不同原料气体温度与压力、原料气体中各组分在‑80~200℃温度范围，以及0.03~4.0MPa压力范围内的吸附分离系数及物理化学性质的差异性，通过耦合各种分离方法调节变压吸附循环过程的吸附或解吸再生操作，拓展了变压或变温吸附分离过程仅限于通过压力或温度变化进行吸附与解吸再生循环操作的吸附理论，从而实现气体分离提纯与净化过程中的能量梯级利用、中浅冷与中高温变压吸附分离过程中吸附与解吸再生易于匹配和平衡的循环操作来分离提纯及净化各种原料气体，改变了传统吸附方法仅限于精制提纯的辅助作用并成为与精馏、吸收、萃取分离同等重要的基础性分离单元操作。

Adsorbent bed support

An adsorbent vessel (104) and process for using the adsorbent vessel (104) subject to thermal swing expansion / contraction is disclosed where the adsorbent vessel (104) comprises a support screen (102) affixed to the adsorption vessel (104) subject to thermal swing expansion / contraction and where a first section of the support screen extends along a portion of the length of the adsorption vessel subject to thermal swing expansion / contraction in the axial direction and comprises apertures permitting gas permeation and where the first section of the support screen has a cross - section in the axial direction that is arcuate.

Method for synthesis gas purification

The present invention relates to an integrated method and apparatus for providing a synthesis gas to a cryogenic separation unit installed for separating synthesis gas into products selected from carbon monoxide, crude hydrogen, methane-rich fuel and syngas with a particular ThiCO ratio. More specifically, the invention relates to the purification of synthesis gas routed to a downstream cryogenic separation unit and minimizing temperature disturbances in the separation unit.

Apparatus for the liquefaction of natural gas and methods relating to same

A liquefaction plant (102) comprising: a plant inlet (112) configured to be sealingly and fluidly coupled with a source of unpurified natural gas; a turbo expander (156) positioned and configured to receive a first stream of natural gas drawn through the plant inlet and produce and expanded cooling stream therefrom; a compressor (158) mechanically coupled to the turbo expander and positioned and configured to receive a second stream of natural gas drawn through the plant inlet and produce a compresses process stream therefrom; a first heat exchanger (166) positioned and configured to receive the compressed process stream and the expanded cooling stream in a countercurrent flow arrangement to cool the compressed process stream; a first plant outlet (132) positioned and configured to be sealingly and fluidly coupled with the source of unpurified gas and to discharge the expanded cooling stream thereinto subsequent to passage thereof through the heat exchanger; a first expansion valve (174) positioned and configured to receive and expand a first portion of the cooled compressed process stream to form an additional cooling stream, the plant further including conduit structure to combine additional cooling stream with the expanded cooling stream to the expanded cooling stream entering the first heat exchanger; a second expansion valve (176) positioned and configured to receive and expand a second portion of the cooled compressed process stream to form gas-solid-liquid mixture therefrom; a first gas-liquid separator (180) positioned and configured to receive the gas-solid-liquid mixture; and a second plant outlet (114) positioned to be sealingly and fluidly coupled with a storage vessel, the first gas-liquid separator being positioned and configured to deliver a liquid contained therein to the second plant outlet.

Process and system for swing adsorption using an overhead stream of a demethanizer as purge gas

用于处理天然气的再生筛材料

用于在气体处理系统中再生筛材料的系统和方法。方法可包括使冷却气体循环通过第一床筛材料，冷却气体具有适用于液化成液态天然气(LNG)产物的第一二氧化碳(CO 2 )浓度。方法也可包括使再生气体循环通过第二床筛材料，再生气体具有大于冷却气体的第一二氧化碳(CO 2 )浓度的第二二氧化碳(CO 2 )浓度。