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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 11245. Отображено 100.
12-01-2012 дата публикации

Process for removing sulphur-containing, nitrogen-containing and halogen-containing impurities contained in a synthesis gas

Номер: US20120010306A1
Автор: David Chiche, Jean Christophe Viguie, Marc Antoine Lelias, Nicolas Boudet, Olivier Ducreux
Принадлежит: IFP Energies Nouvelles IFPEN

The invention relates to a process for finally removing sulphur-containing, nitrogen-containing and halogen-containing impurities contained in a synthesis gas, said process including: a) a joint step for hydrolysing COS and HCN contained in the gas and for collecting the halogen-containing compounds, using a TiO 2 -based catalyst, b) a washing step using a solvent, c) a step for desulphurisation on a collecting or adsorbing mass. The synthesis gas purified in accordance with the process of the invention contains less than 10 ppb by weight, less than 10 ppb by weight of nitrogen-containing impurities and less than 10 ppb by weight of halogen-containing impurities.

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Номер записи: 1
19-01-2012 дата публикации

Nanoparticular metal oxide/anatase catalysts

Номер: US20120014854A1
Автор: Anders Riisager, Andreas Jonas Kunov-Kruse, Rasmus Fehrmann, Soren Birk Rasmussen, Steffen Buss Kristensen
Принадлежит: Danmarks Tekniskie Universitet

The present invention concerns a method of preparation of nanoparticular metal oxide catalysts having a narrow particle size distribution. In particular, the invention concerns preparation of nanoparticular metal oxide catalyst precursors comprising combustible crystallization seeds upon which the catalyst metai oxide is co-precipitated with the carrier metal oxide, which crystallization seeds are removed by combustion in a final calcining step. The present invention also concerns processes wherein the nanoparticular metal oxide catalysts of the invention are used, such as SCR (deNOx) reactions of nitrogen oxides with ammonia or urea as reductant, oxidations of alcohols or aldehydes with dioxygen or air to provide aldehydes, ketones or carboxylic acids, and photocatalytic oxidation of volatile organic compounds (VOCs).

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Номер записи: 2
26-01-2012 дата публикации

USE OF A TiO2- BASED COMPOSITION FOR CAPTURING HALOGENATED COMPOUNDS CONTAINED IN A GASEOUS MIXTURE

Номер: US20120020861A1
Автор: David Chiche, Marc-Antoine Lelias, Olivier Ducreux
Принадлежит: Individual

The invention is concerned with the use of a TiO 2 -based composition for capturing halogenated compounds contained in a gaseous mixture, said composition comprising between 10 wt. % and 100 wt. % of TiO 2 and between 1 wt. % and 30 wt. % of at least one sulfate of an alkaline-earth metal selected from calcium, barium, strontium and magnesium.

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Номер записи: 3
16-02-2012 дата публикации

Catalyst for Removing Nitrogen Oxides

Номер: US20120039758A1
Автор: Kozo Iida, Masanori Demoto, Masashi Kiyosawa, Shigeru Nojima, Yoshiaki Obayashi
Принадлежит: Individual

The present invention is to provide a catalyst for removing nitrogen oxides which is capable of keeping sufficient denitrification performance, i.e., a high removal rate of nitrogen oxides in exhaust gas having a high NO 2 content especially under conditions where the ratio of NO 2 /NO in exhaust gas is 1 or higher, a catalyst molded product therefor, and an exhaust gas treating method. The catalyst is designed for removing nitrogen oxides, which is used to denitrify exhaust gas containing nitrogen oxides having a high NO 2 content, which comprises: at least one kind of oxide selected from the group consisting of copper oxides, chromium oxides, and iron oxides as a component for reducing NO 2 to NO; and which further comprises: at least one kind of titanium oxide; at least one kind of tungsten oxide; and at least one kind of vanadium oxide as components for reducing NO to N 2 .

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Номер записи: 4
05-04-2012 дата публикации

Catalyst and method of manufacture

Номер: US20120082606A1
Автор: Ashish Balkrishna Mhadeshwar, Dan Hancu, Larry Neil Lewis, Robert Edgar Colbum
Принадлежит: General Electric Co

According to various embodiments, a catalyst composition includes a catalytic metal secured to a porous substrate. The substrate has pores that are templated. The substrate is a product of adding a substrate precursor to a water-in-oil microemulsion including a catalytic metal salt, a solvent, a templating agent, and water.

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Номер записи: 5
30-08-2012 дата публикации

Coal power plant having an associated co2 scrubbing station and heat recovery

Номер: US20120216540A1
Автор: Brian Stoever, Christian Bergins, Dieter Konig, Martin Schönwälder, Torsten Buddenberg
Принадлежит: Hitachi Power Europe GmbH

The invention relates to a method for recovering heat by joining a plurality of heat flows of a fossil-fired, in particular carbon-fired, power plant ( 1 ), which downstream of the combustion comprises a CO 2 scrubbing station ( 58 ) for the flue gas by way of chemical absorption and/or desorption and associated CO 2 compression ( 27 ), which method aims to enable a CO 2 scrubbing station for the flue gas, with associated CO 2 compression, to be integrated into the total energy heat flow and/or the total heat energy balance of a fossil-fired, in particular carbon-fired, preferably conventional, power plant in a way that is advantageous in terms of heating technology. This is achieved by decoupling thermal energy from the heat flow of the CO 2 scrubbing station ( 58 ), with associated CO 2 compression, in the form of at least one partial heat flow (Q 8 , Q 9 , Q 10 , Q 11 ) and coupling it back into a heat flow that is coupled, directly or indirectly, to the heat flow of the boiler ( 2 ) or steam generator of the power plant ( 1 ), and/or by decoupling thermal energy from the flue gas heat flow (Q 3 ) in the form of a partial heat flow (Q 12 , Q 13 , Q 14 ) and coupling it back into the heat flow of the CO 2 scrubbing station ( 58 ) with associated CO 2 compression ( 27 ).

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Номер записи: 6
14-03-2013 дата публикации

METHOD OF SUPPRESSING INCREASE IN SO2 OXIDATION RATE OF NOx REMOVAL CATALYST

Номер: US20130065750A1
Автор: Katsumi Nochi, Masashi Kiyosawa
Принадлежит: Mitsubishi Heavy Industries Ltd

In a NO x removal catalyst used for removing nitrogen oxide in flue gas, when a silica (Si) component as an inhibitor that causes an increase in an SO 2 oxidation rate accumulates on a surface of the NO x removal catalyst, the silica component accumulating on the surface of the NO x removal catalyst is dissolved, thereby regenerating the catalyst. Accordingly, the inhibitor such as the silica component covering the surface of the NO x removal catalyst can be removed, thereby enabling to provide a catalyst without having an increase in the SO 2 oxidation rate of the regenerated NO x removal catalyst.

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Номер записи: 7
18-04-2013 дата публикации

Small pore molecular sieve supported copper catalysts durable against lean/rich aging for the reduction of nitrogen oxides

Номер: US20130095012A1
Автор: Erich Weigert, Hai-Ying Chen, Joseph Michael Fedeyko, Paul Joseph Andersen
Принадлежит: Individual

A method of using a catalyst comprises exposing a catalyst to at least one reactant in a chemical process. The catalyst comprises copper and a small pore molecular sieve having a maximum ring size of eight tetrahedral atoms. The chemical process undergoes at least one period of exposure to a reducing atmosphere. The catalyst has an initial activity and the catalyst has a final activity after the at least one period of exposure to the reducing atmosphere. The final activity is within 30% of the initial activity at a temperature between 200 and 500° C.

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Номер записи: 8
25-04-2013 дата публикации

Exhaust Gas Treating System Using Polymer Membrane For Carbon Dioxide Capture Process

Номер: US20130098246A1
Автор: Hang-Dae Jo, Hyung-Keun Lee, Won-Kil Choi
Принадлежит: Korea Institute of Energy Research KIER

Disclosed is an exhaust gas treating system having an exhaust gas treating apparatus for carbon dioxide capture process which additionally removes harmful substances remaining in the gas discharged from the existing flue-gas desulfurization process by using separation membrane so as to efficiently carry out the carbon dioxide capture process. The exhaust gas treating system using polymer membrane, comprises a carbon dioxide capture equipment for capturing carbon dioxide from the exhaust gas of a boiler, a flue-gas denitrification equipment placed between the boiler and the carbon dioxide capture equipment, a dust-collecting equipment and a flue-gas desulfurization equipment.

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Номер записи: 9
27-06-2013 дата публикации

HETEROPOLY ACID PROMOTED CATALYST FOR SCR OF NOx WITH AMMONIA

Номер: US20130164205A1
Автор: Anders Riisager, Rasmus Fehrmann, Sankar Reddy Putluru Siva
Принадлежит: Danmarks Tekniskie Universitet

The present invention concerns the selective removal of nitrogen oxides (NOx) from gases. In particular, the invention concerns a process, a highly alkali metal resistant heteropoly acid promoted catalyst and the use of said catalyst for removal of NOx from exhaust or flue gases, said gases comprising alkali or earth alkali metals. Such gases comprise for example flue gases arising from the burning of biomass, combined biomass and fossil fuel, and from waste incineration units. The process comprises the selective catalytic reduction (SCR) of NOx, such as nitrogen dioxide (NO 2 ) and nitrogen oxide (NO) with ammonia (NH 3 ) or a nitrogen containing compound selected from ammonium salts, urea or a urea derivative or a solution thereof as reductant.

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Номер записи: 10
31-10-2013 дата публикации

CARRIER FOR NOx REDUCTION CATALYST

Номер: US20130287665A1
Автор: Katsumi Nochi, Masanao Yonemura, Masashi Kiyosawa
Принадлежит: Mitsubishi Heavy Industries Ltd

A NOx reduction catalyst carrier yields a NOx reduction catalyst with an improved permissible dose of poisoning substances such as arsenic. More specifically, the present invention relates to a NOx reduction catalyst carrier comprising TiO 2 , having a honeycomb structure and having a specific surface area greater than 100 m 2 /g.

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Номер записи: 11
23-01-2014 дата публикации

Method for Removing Nitrogen Oxides from Combustion Fumes with On-Site Generation of Ammonia

Номер: US20140020365A1
Автор: Federico Zardi, Raffaele Ostuni
Принадлежит: AMMONIA CASALE SA

A method for the control of nitrogen oxides content in the combustion fumes of a thermal power plant is disclosed; the method comprises the on-site production of ammonia by the steps of: electrolysis of water as a source of hydrogen; separation of air as a source of nitrogen, formation of a make-up gas and synthesis of ammonia in a suitable synthesis loop; said on-site produced ammonia, or a solution thereof, is used for a process of reduction of nitrogen oxides in the combustion fumes.

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Номер записи: 12
06-02-2014 дата публикации

Production of catalytically active activated carbons

Номер: US20140037536A1
Автор: Dirk Van De Kleut, Wilhelmina Margaretha Theresia Maria Reimerink-Schats
Принадлежит: Cabot Norit Nederland BV

The invention is directed to a method for preparing catalytically active activated carbon, to catalytically active activate carbon obtainable by the method, and to the use of the catalytically active activated carbon. The method of the invention method comprises the steps of: i) mixing charcoal with one or more organic nitrogen-containing compounds, said nitrogen-containing compounds comprising, next to a first nitrogen atom, at least two or more further heteroatoms selected from the group consisting of nitrogen and oxygen, wherein said further heteroatoms have a lone pair; ii) drying the mixture obtained in step i); iii) activating the dried mixture using steam, thereby producing catalytically active activated carbon.

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Номер записи: 13
13-03-2014 дата публикации

Method for Transforming Nitrogen-Containing Compounds

Номер: US20140072508A1
Автор: Arno Tissler, Frank Klose, Grigory Reznikov, Silke Sauerbeck
Принадлежит: Clariant Produkte Deutschland GmbH

The invention relates to a method for the selective catalytic transformation of nitrogen-containing compounds. The transformation relates to the selective catalytic reduction (SCR) of nitrogen oxides, or the selective catalytic oxidation (SCO) of nitrogen hydrides and nitrogen-containing organic compounds, preferably in waste gas flows of combustion processes with motors and without motors and industrial applications. The catalytic converter comprises a titano-(silico)-alumo-phosphate.

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Номер записи: 14
01-01-2015 дата публикации

SYSTEM AND METHOD FOR REDUCING EMISSIONS

Номер: US20150000244A1
Автор: Kraemer Gilbert Otto, Rodwell Andrew Mitchell, Thatcher Robert Thomas, Thompson Brett Matthew
Принадлежит:

A system for reducing emissions includes a gas production source that produces nitrogen oxides, sulfur oxides, hydrogen sulfide, sulfuric acid, nitric acid, formaldehyde, benzene, metal oxides, or volatile organic compound emissions. An exhaust plenum is downstream from the gas production source, and structure for dispersing a solvent is in the exhaust plenum. A collection tank is in fluid communication with the exhaust plenum to receive the solvent from the exhaust plenum, and a heat source is in the exhaust plenum downstream from the structure for dispersing the solvent. A method for reducing emissions from a gas production source includes flowing exhaust gases through an exhaust plenum, dispersing a solvent through a nozzle in the exhaust plenum, collecting the dispersed solvent in a collection tank, and heating the exhaust gases flowing through the exhaust plenum downstream from the nozzle. 1. A system for reducing emissions , comprising:a. a gas production source that produces at least one of nitrogen oxides, sulfur oxides, hydrogen sulfide, sulfuric acid, nitric acid, formaldehyde, benzene, metal oxides, or volatile organic compound emissions;b. an exhaust plenum downstream from the gas production source;c. means for dispersing a solvent in the exhaust plenum;d. a collection tank in fluid communication with the exhaust plenum to receive the solvent from the exhaust plenum; ande. a heat source in the exhaust plenum downstream from the means for dispersing the solvent in the exhaust plenum.2. The system as in claim 1 , further comprising a recirculation path between the collection tank and the means for dispersing the solvent in the exhaust plenum.3. The system as in claim 1 , further comprising a sparge pipe in fluid communication with the collection tank.4. The system as in claim 1 , further comprising a catalytic converter in the exhaust plenum and a fluid communication between the collection tank and the exhaust plenum upstream from the catalytic converter.5 ...

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Номер записи: 15
06-01-2022 дата публикации

CATALYTIC COMPOSITION WITH ADDED COPPER TRAPPING COMPONENT FOR NOx ABATEMENT

Номер: US20220001371A1
Автор: Yuejin Li
Принадлежит: BASF Corp

The present disclosure provides catalyst compositions for NOx conversion and wall-flow filter substrates comprising such catalyst compositions. Certain catalyst compositions include a zeolite with sufficient Cu exchanged into cation sites thereof to give a Cu/Al ratio of 0.1 to 0.5 and a CuO loading of 1 to 15 wt. %; and a copper trapping component (e.g., alumina) including a plurality of particles having a D90 particle size of about 0.5 to 20 microns in a concentration of about 1 to 20 wt. %. The zeolite and copper trapping component can be in the same washcoat layer or can be in different washcoat layers (such that the copper trapping component serves as a “pre-coating” on the wall-flow filter substrate).

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Номер записи: 16
02-01-2020 дата публикации

Composition for Mineralizing Carbon Dioxide and Nitrogen Oxide Gases and Uses of Same

Номер: US20200001273A1
Автор: Llobregat Agustí Juan Carlos, Sivera Marzá José Antonio
Принадлежит:

The invention relates to a composition for mineralising carbon dioxide and nitrogen oxide gases, which comprises a mixture of magnesium (between 1 and 25%), iron (between 1 and 23%), calcium monoxide (between 1 and 25%), titanium dioxide (between 0.1 and 11%) and silicon dioxide (between 16 and 75%), with a particle diameter between 100 nm and 4000 μm. The composition causes the mineralisation of carbon dioxide (CO) and of the gaseous chemical compounds known as “nitrogen oxides” (NO) in the atmosphere. This composition can be added or mixed as an additive in paints, dyes, resins and elastic polymers (gum and natural rubber) in parts with wear, and for any type of covering. 1. A composition for mineralising gases of carbon dioxide and nitrogen oxides comprising a mixture of igneous rocks which comprises magnesium (between 1 and 25%) , iron (between 1 and 23%) , calcium monoxide (between 1 and 25%) , titanium dioxide (between 0.1 and 11%) and silicon dioxide (between 16 and 75%) , with a particle diameter between 100 nm and 4000 μm.2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. The composition according to claim 1 , comprising between 0.1 and 2% of titanium dioxide.7. A coating comprising the composition defined in .8. A coating comprising the composition defined in .9. A paint claim 1 , lacquer claim 1 , dye claim 1 , resin claim 1 , natural rubber claim 1 , gum and/or varnish claim 1 , comprising the composition defined in .10. A paint claim 6 , lacquer claim 6 , dye claim 6 , resin claim 6 , natural rubber claim 6 , gum and/or varnish claim 6 , comprising the composition defined in .11. The natural rubber and/or gum according to claim 9 , wherein it is an element subject to wear.12. The natural rubber and/or gum according to claim 11 , wherein said element subject to wear is a tire.13. The paint claim 9 , lacquer claim 9 , dye claim 9 , resin claim 9 , natural rubber claim 9 , gum and/or varnish according to claim 9 , wherein it comprises a percentage by ...

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Номер записи: 17
03-01-2019 дата публикации

BI-METAL MOLECULAR SIEVE CATALYSTS

Номер: US20190001313A1
Автор: Chen Hai-Ying, FEDEYKO JOSEPH MICHAEL, RIVAS-CARDONA Alejandra
Принадлежит:

Provided is a catalyst composition comprising a small pore molecular sieve, about 0.5-5 weight percent of a transition metal (T) selected from copper and/or iron, based on the total weight of the zeolite, and about 0.5-5 weight percent nickel, based on the total weight of the molecular sieve, wherein the transition metal and nickel are present in a T:Ni ratio of about 10:1 to about 1:2. Also provided is a synthesis method for preparing a small pore molecular sieve having both Cu and Ni incorporated in situ. Also provided is a method for using such a catalyst for selectively reducing NOx in an exhaust gas. 1. A catalyst composition comprising a small pore molecular sieve , about 0.5-5 weight percent of a transition metal (T) selected from copper and/or iron , based on the total weight of the molecular sieve , and about 0.5-5 weight percent nickel , based on the total weight of the molecular sieve , wherein the transition metal and nickel are present in a T:Ni ratio of about 10:1 to about 1:2.2. The catalyst composition of claim 1 , wherein the transition metal and the nickel are incorporated into the molecular sieve during synthesis.3. The catalyst composition of claim 1 , wherein a majority of the transition metal and the nickel are present as extra-framework metals.4. The catalyst composition of claim 1 , wherein the molecular sieve is composed of crystals claim 1 , and the transition metal and the nickel are present in a weight percentage as measured by XPS that is within 10% of their weight percentage as measured by XRF5. The catalyst composition of claim 1 , wherein the molecular sieve has a CHA framework.6. The catalyst composition of claim 1 , wherein the molecular sieve has an AEI framework.7. The catalyst composition of claim 1 , wherein the molecular sieve is a zeolite having a silica-to-alumina ratio of about 10 to about 50.8. The catalyst composition of claim 1 , wherein the molecular sieve is essentially free of non-aluminum framework metals.9. The ...

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Номер записи: 18
05-01-2017 дата публикации

CIT-10: A TWO DIMENSIONAL LAYERED CRYSTALLINE MICROPOROUS SILICATE COMPOSITION AND COMPOSITIONS DERIVED THEREFROM

Номер: US20170001872A1
Автор: Davis Mark E., SCHMIDT JOEL E.
Принадлежит:

This disclosure relates to a new crystalline microporous silicate solid, designated CIT-10, comprising a two dimensional layered structure, having an organic interlayer sandwiched between individual crystalline silicate layers. This CIT-10 material can be converted to a pure-silicate of RTH topology, as well as two new of pillared silicate structures, designated CIT-11 and CIT-12. This disclosure characterizes new materials and provides methods of preparing and using these new crystalline microporous solids. 1. A crystalline microporous silicate , designated CIT-10 , which exhibits a powder X-ray diffraction (XRD) pattern exhibiting at least five of the characteristic peaks at 7.6±0.2° , 8.7±0.2° , 10.3±0.2° , 18.8±0.2° , 20.3±0.2° , 21.8±0.2° , 22.4±0.2° , 22.7±0.2° , 22.9±0.2° , and 23.6±0.2° 2-theta.2. The crystalline microporous silicate of claim 1 , wherein the crystalline microporous silicate comprises a two dimensional layered structure claim 1 , having an organic material sandwiched between individual crystalline silicate layers.3. The crystalline microporous silicate of claim 2 , having a structure which is ordered along its two dimensional crystalline silicate layers claim 2 , but which exhibits disorder between its crystalline silicate layers claim 2 , as evidenced by RED (rotating electron diffraction) structure analysis.4. The crystalline microporous silicate of claim 1 , which exhibits an Si-MAS NMR spectrum having resonances at chemical shifts of −113 ppm claim 1 , −107 ppm claim 1 , and −102 ppm claim 1 , relative to tetramethylsilane (TMS).5. The crystalline microporous silicate of claim 4 , wherein the resonances at chemical shifts of −113 ppm claim 4 , −107 ppm claim 4 , and −102 ppm have relative integrated intensities of 8 claim 4 , 5 claim 4 , and 3 claim 4 , respectively.7. A crystalline microporous silicate claim 4 , designated CIT-11 claim 4 , which exhibits a powder X-ray diffraction (XRD) pattern exhibiting at least five of the ...

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Номер записи: 19
07-01-2021 дата публикации

Gas purification device

Номер: US20210002569A1
Автор: Kaori Yoshida, Rikio KAN, Seiji Kakesako
Принадлежит: Mitsubishi Heavy Industries Engineering Ltd

A gas purification device includes: a converter packed with a catalyst for hydrolyzing both carbonyl sulfide and hydrogen cyanide; an upstream heat exchanger for heat exchange between a gas to be introduced into the converter and a cooling fluid for cooling the gas; a reaction-temperature estimation member for estimating a reaction temperature inside the converter; and a flow-rate adjustment member for adjusting a flow rate of the cooling fluid flowing into the upstream heat exchanger based on an estimated value of the reaction-temperature estimation member to control the reaction temperature.

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Номер записи: 20
12-01-2017 дата публикации

Gas Processing Apparatus

Номер: US20170007958A1
Автор: Akio Ui, Masato Akita, Yosuke Sato
Принадлежит: Toshiba Corp

A gas processing apparatus of an embodiment has stacks, gas flow paths, an AC power supply, and a flow limiter. The stacks are away from each other and in parallel. Each stack includes a dielectric substrate and a first to a third electrode. The first and second electrodes are respectively disposed on the first and second main surfaces of the dielectric substrate. The third electrode is disposed inside the dielectric substrates. The gas flow paths supply a target gas between the stacks, The AC power supply applies an AC voltage across the first and second electrodes and the third electrodes, so as to generate plasma induced flows of the target gas between the dielectric substrates. The flow limiter is disposed on a downstream side of the stacks and limits a flow rate of the target gas.

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Номер записи: 21
12-01-2017 дата публикации

LIMESTONE SUPPLY DEVICE AND AIR POLLUTION CONTROL SYSTEM

Номер: US20170007959A1
Автор: Fukuda Toshihiro, Kagawa Seiji, Kamiyama Naoyuki, Okino Susumu
Принадлежит: Mitsubishi Hitachi Power Systems, Ltd.

A limestone supply device is provided for supplying calcium carbonate to an upstream of a desulfurization device and a heat exchanger disposed on an upstream of the desulfurization device on a flue gas duct through which flue gas discharged from a combustion engine in which a fuel burns flows. An air pollution control system having the limestone supply device is provided, including a calcium carbonate accumulate unit configured to accumulate calcium carbonate, a calcium carbonate transport unit configured to transport the calcium carbonate accumulated in the calcium carbonate accumulate unit, a calcium carbonate supply unit configured to supply the calcium carbonate transported by the calcium carbonate transport unit to the flue gas duct, and a moisture supply unit configured to supply moisture to a region to which the calcium carbonate is supplied by the calcium carbonate supply unit. 17-. (canceled)8. An air pollution control system comprising:a heat exchanger configured to recover heat of flue gas from a combustion engine in which fuel burns;a dust collector configured to remove dust in the flue gas before the heat is recovered by the heat exchanger;a desulfurization device configured to remove sulfur oxides contained in the flue gas using an absorbent after removing the dust;a limestone supply device arranged between the dust collector and the desulfurization device or an upstream of the dust collector: anda controller, wherein the limestone supply device comprising;a calcium carbonate accumulate unit configured to accumulate calcium carbonate;a calcium carbonate transport unit configured to transport, the calcium carbonate accumulated in the calcium carbonate accumulate unit;a calcium carbonate supply unit configured to supply the calcium carbonate transported by the calcium carbonate transport unit, to a flue gas duct; anda moisture supply unit configured to supply moisture to a region of the flue gas duct to which the calcium carbonate is supplied by the ...

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Номер записи: 22
12-01-2017 дата публикации

HONEYCOMB DENITRATION CATALYST FOR FLUE GAS AT 400°C-600°C AND PREPARATION METHOD THEREOF

Номер: US20170007990A1
Автор: CHEN Minjun, CHEN Wangyuan, FAN Jianwei, JIANG Xu, Li Dandan, MIN Hongyang, PAN Rongxing, RAN Xianqiang, Sun Yu, ZOU Liyin
Принадлежит:

A honeycomb denitration catalyst used for flue gas at 400° C.-600° C. and preparation method thereof. The honeycomb denitration catalyst includes a catalyst coating and a honeycomb ceramic, where a slurry of the catalyst coating is made from components having the following mass percentages: 15%-25% of a zeolite, 5%-10% of a γ-alumina, 5%-10% of a catalyst auxiliary agent, 5% of a binder, and 50%-70% of deionized water. The honeycomb ceramic is soaked repeatedly into the slurry of the catalyst coating. After the soaking is completed, the obtained product is dried and calcined to obtain the honeycomb denitration catalyst. The honeycomb denitration catalyst contains a catalyst auxiliary agent and has excellent denitration activity at high temperatures, sulphur-resistance and water-tolerance ability, stability and NOremoving ability. 1. A honeycomb denitration catalyst used for flue gas at 400° C.-600° C. , comprising a catalyst coating and a honeycomb ceramic , wherein the catalyst coating is deposited on surfaces of the honeycomb ceramic , the catalyst coating is made from components having the following mass percentages:a zeolite in an amount of 15%-25%;a γ-alumina in an amount of 5%-10%;a catalyst auxiliary agent in an amount of 5%-10%;a binder in an amount of 5%; anddeionized water in an amount of 50-70%.2. The honeycomb denitration catalyst of claim 1 , wherein the catalyst coating is 2%-15% of the total mass of the honeycomb denitration catalyst.3. The honeycomb denitration catalyst of claim 1 , wherein the zeolite is selected from the group consisting of ZSM-5 type zeolite molecular sieve claim 1 , A-type zeolite molecular sieve claim 1 , X-type zeolite molecular sieve claim 1 , Y-type zeolite molecular sieve claim 1 , and any combinations thereof4. The honeycomb denitration catalyst of claim 1 , wherein the catalyst auxiliary agent is selected from the group consisting of ammonium molybdate claim 1 , cerium nitrate claim 1 , ferrous chloride claim 1 , ammonium ...

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Номер записи: 23
14-01-2016 дата публикации

Catalytic Article for Treating Exhaust Gas

Номер: US20160008759A1
Автор: GAST JANE, GENSCHOW Tim, Larsson Mikael, MARKATOU PENELOPE, Smedler Gudmund, SONNTAG Olivier, WALKER ANDREW PETER, Zhang Lingzhi
Принадлежит:

Provided is a catalytic article comprising (a) a flow through honeycomb substrate having channel walls; (b) a first NH-SCR catalyst composition coated on and/or within the channel walls in a first zone; and (c) a second NH-SCR catalyst composition coated on and/or within the channel walls in a second zone, provided that the first zone is upstream of the second zone and the first and second zones are adjacent or at least partially overlap; and wherein the first NH-SCR catalyst comprises a first copper loaded molecular sieve having a copper to aluminum atomic ratio of about 0.1 to 0.375 and the second NH-SCR catalyst comprises a second copper loaded molecular sieve having a copper-to-aluminum atomic ratio of about 0.3 to about 0.6. 1. A catalytic article comprising:a. a flow through honeycomb substrate having an inlet side, an outlet side, an axial length from the inlet side to the outlet side, and a plurality of channels defined by channel walls extending from the inlet side to the outlet side;{'sub': '3', 'b. a first NH-SCR catalyst composition coated on and/or within the channel walls in a first zone; and'}{'sub': '3', 'claim-text': {'sub': 3', '3, 'wherein the first NH-SCR catalyst comprises a first copper loaded molecular sieve having a copper to aluminum atomic ratio of about 0.1 to 0.375 and the second NH-SCR catalyst comprises a second copper loaded molecular sieve having a copper-to-aluminum atomic ratio of about 0.3 to about 0.6.'}, 'c. a second NH-SCR catalyst composition coated on and/or within the channel walls in a second zone, provided that the first zone is upstream of the second zone and the first and second zones are adjacent or at least partially overlap;'}2. The catalytic article of claim 1 , wherein the first zone is adjacent to the second zone.3. The catalytic article of claim 1 , wherein the first zone completely overlays the second zone.4. The catalytic article of claim 1 , wherein first zone extends from the inlet side to a first end point ...

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Номер записи: 24
08-01-2015 дата публикации

MICROWAVE CATALYST AND PREPARATION PROCESS AND USE THEREOF

Номер: US20150010455A1
Автор: Gao Lingfei, Jiang Zunfang, Mao Guiyue, WANG Hongli, Wang Meng, Wang Zhe, Zhou Jicheng
Принадлежит:

Provided is a microwave catalyst. The microwave catalyst comprises: i) an active catalyst component comprising a metal and/or a metal oxide; ii) a microwave-absorbing component comprising at least one of CuO, ferrite spinel, and active carbon; and iii) a support. The microwave catalyst can be used for denitration by microwave catalysis, and has advantages such as high denitration efficiency, low energy consumption, environmental friendliness, and low costs. Also provided is a process for preparing the microwave catalyst and the use thereof. 1. A microwave catalyst , comprising:i) an active catalyst component, comprising a metal and/or a metal oxide;ii) a microwave-absorbing component, comprising at least one of CuO, ferrite spinel, and active carbon; andiii) a support.2. The microwave catalyst according to claim 1 , wherein the metal is at least one selected from the group consisting of Cu claim 1 , Mn claim 1 , Ce claim 1 , Ti claim 1 , V claim 1 , Mg claim 1 , and Fe claim 1 , preferably Cu; and the metal oxide is at least one oxide selected from the oxides of Cu claim 1 , Mn claim 1 , Ce claim 1 , Ti claim 1 , V claim 1 , Mg claim 1 , and Fe claim 1 , preferably CuO.3. The microwave catalyst according to claim 1 , wherein the support has a porous structure capable of absorbing microwave claim 1 , preferably being active carbon and/or a molecular sieve.4. The microwave catalyst according to claim 3 , wherein the molecular sieve is a ZSM-type molecular sieve claim 3 , Y-type molecular sieve claim 3 , or 13-type molecular sieve claim 3 , preferably a ZSM-5 molecular sieve.5. The microwave catalyst according to claim 1 , wherein the catalyst preferably contains Cu-ZSM-5 or Cu—Y.6. The microwave catalyst according to claim 5 , wherein the content of Cu in Cu-ZSM-5 is in the range from 2% to 12% by mass.7. The microwave catalyst according to claim 5 , wherein the content of Cu in Cu—Y is in the range from 2% to 15% by mass.8. The microwave catalyst according to claim 1 ...

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Номер записи: 25
14-01-2021 дата публикации

SELECTIVE CATALYTIC REDUCTION CATALYST COMPOSITION

Номер: US20210008524A1
Автор: Bauer Jürgen, Dotzel Ralf, Muench Joerg Werner, Purova Ralitsa, SCHWIEGER Wilhelm, Selvam Thangaraj, Shahid Ameen
Принадлежит:

A SCR catalyst composition comprises a SCR catalyst; and a binder comprising a porous inorganic material, wherein the porous inorganic material comprises a disordered arrangement of delaminated layers, has a disordered porous structure, and has a multimodal pore size distribution comprising at least a first modal maximum having a macroporous or mesoporous pore size and a second modal maximum having a microporous pore size. The SCR catalyst composition can be manufactured using the method comprising the steps of: (i) providing an inorganic material having a layered structure; (ii) contacting the material with a cationic surfactant to form a swollen material; (iii) agitating the swollen material to form an agitated material; and (iv) calcining the agitated material to recover a delaminated inorganic material, wherein an SCR catalyst is mixed with the inorganic material prior to step (iv). 1. A selective catalytic reduction (SCR) catalyst composition comprising:a SCR catalyst; anda binder comprising a porous inorganic material,wherein the porous inorganic material comprises a disordered arrangement of delaminated layers, has a disordered porous structure, and has a multimodal pore size distribution comprising at least a first modal maximum having a macroporous or mesoporous pore size and a second modal maximum having a microporous pore size.2. The SCR catalyst composition of claim 1 , wherein the multimodal pore size distribution is bimodal.3. The SCR catalyst composition of claim 1 , wherein a powder X-ray diffraction pattern of the porous inorganic material obtained using Cu Kα radiation is devoid of peaks at 2θ values of 10° or less.4. The SCR catalyst composition of claim 1 , wherein the first modal maximum has a mesoporous and/or macroporous pore size.5. The SCR catalyst of claim 1 , wherein the delaminated layers are delaminated silicate layers.6. The SCR catalyst composition of claim 1 , wherein the porous inorganic material comprises one or more of: a clay ...

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Номер записи: 26
19-01-2017 дата публикации

MERCURY REMOVAL APPARATUS, A FLUE GAS TREATMENT SYSTEM, AND A METHOD OF REMOVING MERCURY

Номер: US20170014762A1
Автор: OKAMOTO Masaru, Shimada Hideaki, TERADA Shinichi
Принадлежит: KABUSHIKI KAISHA TOSHIBA

A mercury removal apparatus for removing the metal mercury in an flue gas containing the metal mercury and halogen, including an electro discharging device including a first electrode and a second electrode facing the first electrode, and activating the mercury by generating a streamer discharge, an oxidizing catalyst device provided at an output of the electro discharging device, to oxidize the mercury by reacting with halogen in the flue gas. 1. A mercury removal apparatus for removing the metal mercury in flue gas containing the metal mercury , comprising:an electro discharging device including a first electrode and a second electrode facing the first electrode, to activate the mercury by generating streamer discharge; andan oxidizing catalyst device provided at an output of the electro discharging device, to oxide the mercury by reacting with the halogen in the flue gas.2. The mercury removal apparatus of claim 1 , comprising:multiple sets of the electro discharging device and the oxidizing catalyst device provided serially.3. The mercury removal apparatus of claim 1 , comprising:multiple sets of the electro discharging device and oxidizing catalyst device provided in parallel.4. The mercury removal apparatus of claim 1 , whereinthe second electrode surrounds the first electrode, and the second electrode includes an opening through which the flue gas flows.5. The mercury removal apparatus of claim 1 , whereina gap between the first electrode and second electrode is from 5 mm to 30 mm.6. The mercury removal apparatus of claim 1 , whereinthe oxidizing catalyst device includes a catalytic support composed of metal or ceramic.7. The mercury removal apparatus of claim 1 , whereinthe second electrode is arranged as a planar square shape, and the first electrode is provided at the center of the square.8. The mercury removal apparatus of claim 1 , further comprising:a pulse power supply unit adding a pulse voltage to the first electrode.9. The mercury removal apparatus ...

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Номер записи: 27
19-01-2017 дата публикации

METHOD FOR TREATING ENGINE EXHAUST BY USE OF HYDROTHERMALLY STABLE, LOW-TEMPERATURE NOx REDUCTION NH3-SCR CATALYSTS

Номер: US20170014814A1
Автор: Chaitanya K. Narula, Xiaofan Yang
Принадлежит: UT Battelle LLC

A catalyst composition includes a heterobimetallic zeolite characterized by a chabazite structure loaded with copper ions and at least one trivalent metal ion other than Al 3+ . The catalyst composition decreases NO x emissions in diesel exhaust and is suitable for operation in a catalytic converter.

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Номер записи: 28
03-02-2022 дата публикации

Renewable transportation fuel process with thermal oxidation sysem

Номер: US20220033722A1
Автор: Jan DE REN, Xin X. Zhu
Принадлежит: Honeywell International Inc

A process for treating effluent streams in a renewable transportation fuel production process is described. One or more of the sour water stream and an acid gas stream are treated directly in thermal oxidation section. The process allows the elimination or size reduction of a sour water stripper unit, waste water treatment plant, and sulfur recovery unit.

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Номер записи: 29
15-01-2015 дата публикации

Coating for reducing nitrogen oxides

Номер: US20150017083A1
Автор: Teuvo Maunula
Принадлежит: DINEX ECOCAT OY

A catalyst coating for use in a hydrolysis catalyst (H-catalyst) for the reduction of nitrogen oxides, a manufacturing method for such a coating, a catalyst structure and its use are described. The H-catalyst includes alkaline compounds, which are capable of adsorbing HNCO and/or nitrogen oxides and which include alkali and alkaline earth metals, lanthanum and/or yttrium and/or hafnium and/or prasedium and/or gallium, and/or zirconium for promoting reduction, such as for promoting the hydrolysis of urea and the formation of ammonia and/or the selective reduction of nitrogen oxides.

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Номер записи: 30
03-02-2022 дата публикации

A method of selectively catalytically oxidizing dinitrogen oxide, a method of detecting radiocarbon, an apparatus, and use of a NiO catalyst

Номер: US20220034858A1
Автор: Genoud Guillaume, Koskinen-Soivi Mari-Leena, Lehmuskoski Johannes, REINIKAINEN Matti
Принадлежит:

A method of selectively catalytically oxidizing dinitrogen oxide present in a gaseous sample, comprising: heating a NiO catalyst to a temperature of at least 250° C.; and bringing the gaseous sample into contact with the heated NiO catalyst to oxidize dinitrogen oxide of the gaseous sample in the presence of the heated NiO catalyst. 1. A method of selectively catalytically oxidizing dinitrogen oxide present in a gaseous sample , comprising:heating a NiO catalyst to a temperature of at least 250° C.; andbringing the gaseous sample into contact with the heated NiO catalyst to oxidize the dinitrogen oxide of the gaseous sample in the presence of the heated NiO catalyst.2. The method according to claim 1 , wherein the concentration of methane in the sample is less than 1% and the oxidation of the dinitrogen oxide is carried out while avoiding oxidation of any methane present in the sample.3. The method according to claim 1 , wherein the catalyst is a heterogeneous alkaline NiO catalyst.4. The method according to claim 1 , wherein the catalyst is a heterogeneous NiO/NaOH catalyst.5. The method according to claim 1 , wherein the catalyst is heated to a temperature of at least 300° C.6. The method according to claim 1 , wherein the gaseous sample additionally contains COand CH.7. The method according to claim 1 , wherein the gaseous sample is a gaseous emission sample from a nuclear power plant or originates from a biofuel.8. The method according to claim 1 , wherein the gaseous sample is a gaseous atmospheric sample.9. A method of detecting radiocarbon in the form of COin a gaseous sample comprising at least COand dinitrogen oxide claim 1 , the method comprising:selectively catalytically oxidizing the dinitrogen oxide present in the gaseous sample; and subsequently{'sup': '14', 'sub': '2', 'determining the amount of COin the gaseous sample by infrared absorption spectroscopy.'}10. The method according to claim 9 , wherein claim 9 , before the determination step:{'sup': ' ...

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Номер записи: 31
17-04-2014 дата публикации

Denox Treatment For A Regenerative Pyrolysis Reactor

Номер: US20140105802A1
Автор: Frank Hershkowitz, Paul F. Keusenkothen
Принадлежит: ExxonMobil Chemical Co, ExxonMobil Chemical Patents Inc

A process of introducing a NOx reduction fluid into combustion products within a downstream end of a regenerative pyrolysis reactor. This NOx reduction fluid may thermally reduce NOx contained therein. The NOx reduction fluid may include ammonia.

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Номер записи: 32
28-01-2016 дата публикации

EXHAUST GAS PURIFICATION CATALYST

Номер: US20160023192A1
Автор: MINAMI Keiichi
Принадлежит:

To provide an excellent exhaust gas purification catalyst with satisfactory NOselective reductive purification performance at lower temperature, and having a satisfactory NO formation rate. 1. A selective reduction catalyst for exhaust gas purification , represented by the formula: CoMn)TiO(where x in the molar ratio is a value greater than 0 and 0.2 or less).2. The selective reduction catalyst for exhaust gas purification according to claim 1 , wherein x is 0.1 or more and 0.2 or less.3. An exhaust gas purification method claim 1 , employing the selective reduction catalyst for exhaust gas purification according to .4. An exhaust gas purification method claim 2 , employing the selective reduction catalyst for exhaust gas purification according to . The present invention relates to an exhaust gas purification catalyst, and particularly to a NO-selective reduction catalyst.In recent years, worldwide restrictions on exhaust gas are becoming tighter from the viewpoint of environmental protection. As one measure, exhaust gas purification catalysts are being employed in internal combustion engines. In order to efficiently remove the hydrocarbons (hereunder abbreviated as “HC”), CO and nitrogen oxides (hereunder abbreviated as “NOx”) in exhaust gas, exhaust gas purification catalysts employ precious metals such as Pt, Pd and Rh as catalyst components.Vehicles using such exhaust gas purification catalysts, such as gasoline engine vehicles and diesel engine vehicles, employ various types of systems designed to increase both catalytic activity and fuel efficiency. For example, in order to increase fuel efficiency, combustion is carried out under lean air/fuel ratio (A/F) conditions (oxygen excess) during steady operation, and in order to increase catalytic activity, combustion is temporarily conducted under stoichiometric (theoretical air/fuel ratio, A/F=14.7) to rich (fuel excess) conditions.This is because conventionally known catalysts including precious metals such as Pt ...

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Номер записи: 33
25-01-2018 дата публикации

COATED ARTICLES HAVING HIGH KNOx/KSOx RATIOS FOR SELECTIVE CATALYTIC REDUCTION

Номер: US20180021724A1
Автор: ANDERSEN PAUL JOSEPH, Brandmair Maria, CLAVE Silvia Alcove, Foo Rodney, GOMERSALL Bruce, Nash Michael, Wagland Alison Mary
Принадлежит:

Articles comprising a catalyst film comprising VOx, MoOor WO, and TiOdeposited on a substrate are disclosed. The articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases. Methods for producing such articles deposit a catalyst film on the substrate to form a coated substrate, which is then calcined. When used in an SCR process, the coated articles have enhanced activity for NOx conversion, reduced activity for SOx conversion, or both. Light-weight, coated articles having high catalyst loads can be fabricated at the same or reduced dimensions when compared with laminated articles, and increased kNOx/kSOx ratios are available even from coated articles having relatively thin catalyst films. The articles should have particular value for power plant operations, where coal and high-sulfur fuels are commonly used and controlling sulfur trioxide generation is critical. 1. An article comprising:(a) a substrate; and(b) a film deposited on the substrate;{'sub': 3', '3', '2, 'wherein the film comprises VOx, MoOor WO, and TiO, and the article catalyzes the conversion of nitrogen oxides in a gas containing nitrogen oxides.'}2. The article of claim 1 , wherein the film comprises 0.1 to 5 wt. % of VOx claim 1 , 0.5 to 20 wt. % of MoOor WO claim 1 , and 75 to 99.4 wt. % of TiO.3. The article of claim 1 , wherein the film comprises 0.5 to 2 wt. % of VOx claim 1 , 1 to 10 wt. % of MoOor WO claim 1 , and 88 to 98.5 wt. % of TiO.4. The article of claim 1 , wherein the film has a thickness of from about 20 μm to about 500 μm.5. The article of claim 1 , wherein the film has a thickness of from about 50 μm to about 150 μm.6. The article of claim 1 , wherein the substrates a monolith or a plate.7. The article of claim 1 , the article having less mass and at least one of: (a) enhanced activity for NOx conversion at a temperature between 350° C. and 400° C.; and (b) reduced activity for SOx conversion at a temperature between 380° C. and 430° C. claim 1 , compared ...

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Номер записи: 34
25-01-2018 дата публикации

CATALYSTS FOR ENHANCED REDUCTION OF NOx GASES AND PROCESSES FOR MAKING AND USING SAME

Номер: US20180021725A1
Автор: Gao Feng, Kollar Marton, Peden Charles H. F., Szanyi Janos, Wang Yilin
Принадлежит: BATTELLE MEMORIAL INSTITUTE

Cu-exchanged zeolite catalysts with a chabazite structure containing selected concentrations of alkali ions or alkaline-earth ions and a lower concentration of (Cu) ions are described and a sequential process for making. Catalysts of the present invention reduce light-off temperatures providing enhanced low-temperature conversion of NOx gases. Catalysts of the present invention also exhibit high selectivity values compared to conventional NOx reduction catalysts. 1. A modified NOx reduction catalyst that contains less than 2 percent copper metal by weight in a synthetic chabazite zeolite incorporating at least one material selected from the group consisting of Na , Li , K and Ca and provides a light off temperature less than 175° C. , the catalyst produced by the process of:fabricating a synthetic chabazite zeolite in sodium form;exchanging the sodium therein with NH4+ ions forming a NH4-exchanged chabazite zeolite;{'sup': +', '++, 'exchanging the NH4+ ions in the NH4-exchanged chabazite zeolite with a single alkali or alkaline-earth element and calcining same to secure the alkali or alkaline-earth element in active sites therein forming a fully alkali (A) or alkaline-earth (AE)-exchanged chabazite zeolite;'}exchanging a quantity of the alkali or alkaline-earth element in the alkali (A+) or alkaline-earth (AE++)-exchanged chabazite zeolite with copper to obtain a loading of copper metal above zero percent to at or below 2 percent by weight therein; and hydrothermally aging the copper-exchanged chabazite zeolite to stabilize the catalyst.2. A process for fabricating a modified NOx reduction catalyst that provides a light off temperature less than 175° C. , the process comprising:fabricating a synthetic chabazite zeolite in sodium form;exchanging the sodium therein with NH4+ ions forming a NH4-exchanged chabazite zeolite;{'sup': +', '++, 'exchanging the NH4+ ions in the NH4-exchanged chabazite zeolite with a single alkali or alkaline-earth element and calcining same ...

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Номер записи: 35
25-01-2018 дата публикации

PREPARATION METHOD FOR METAL-MODIFIED SAPO MOLECULAR SIEVE

Номер: US20180021763A1
Автор: HE Yanli, Liu Lin, Liu Zhongmin, Sang Shiyun, Tian Peng, Xiang Xiao, Yang Hongyi, Yang Miao, Yang Yue
Принадлежит: Dalian Institute of Chemical Physics, Chinese Academy of Sciences

A preparation method for a metal-modified SAPO molecular sieve is disclosed, characterized in adding a raw powder of the SAPO molecular sieve to a solution containing metal ions for performing ion exchange, and then washing and drying the obtained solid after ion exchange, so as to obtain the metal-modified SAPO molecular sieve. The metal-modified SAPO molecular sieve prepared has a relatively high degree of crystallinity, and the metal elements occupy the ionic positions in the channels and/or cages of the SAPO molecular sieve, and the metal-modified SAPO molecular sieve shows excellent catalytic performance in the catalytic reaction. 110-. (canceled)11. A preparation method for a metal-modified SAPO molecular sieve , which comprises at least the following steps:adding SAPO molecular sieve raw powder to a solution containing metal ions and performing ion exchange, and thenwashing and drying the obtained solid after the ion exchange, so as to obtain the metal-modified SAPO molecular sieve.12. The method according to claim 11 , wherein the SAPO molecular sieve raw powder is at least one selected from SAPO-34 molecular sieve raw powder claim 11 , SAPO-35 molecular sieve raw powder claim 11 , SAPO-56 molecular sieve raw powder claim 11 , SAPO-18 molecular sieve raw powder claim 11 , SAPO-5 molecular sieve raw powder claim 11 , SAPO-11 molecular sieve raw powder claim 11 , DNL-6 molecular sieve raw powder.13. The method according to claim 11 , wherein the metal ion is at least one selected from Group IA metal ions claim 11 , Group HA metal ions claim 11 , Group IIIA metal ions claim 11 , Group VA metal ions claim 11 , Group IVB metal ions claim 11 , Group VB metal ions claim 11 , Group VIIB metal ions claim 11 , Group VIII metal ions claim 11 , Group IB metal ions claim 11 , Group IIB metal ions claim 11 , lanthanide metal ions.14. The method according to claim 11 , wherein the metal ion is at least one selected from copper ions claim 11 , iron ions claim 11 , lanthanum ...

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Номер записи: 36
25-01-2018 дата публикации

STABILIZED METAL-EXCHANGED SAPO MATERIAL

Номер: US20180021764A1
Автор: Mohanan Jaya L., Prasad Subramanian, Wende Martin C.
Принадлежит:

Described are catalyst materials and catalytic articles comprising a metal exchanged SAPO material comprising a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant. 116-. (canceled)17. A process for stabilizing a selective catalytic reduction catalyst material comprising a SAPO material and an exchanged metal , the process comprising:exposing the SAPO material to dry ammonia; andion exchanging the SAPO material with a metal salt to provide a stabilized SAPO material.18. The process of claim 17 , wherein the metal of the metal salt is selected from the group consisting of Cu claim 17 , Fe claim 17 , Co claim 17 , Ce and Ni.19. The process of claim 18 , wherein the metal comprises copper.20. The process of claim 19 , wherein the SAPO material comprises SAPO-34.21. The process of claim 17 , wherein the stabilized SAPO material comprises a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites.22. The process according to claim 21 , wherein the plurality of substitutional sites includes less than 5% Si(0Al) sites.23. The process according to claim 21 , wherein the plurality of substitutional sites includes less than 1% Si(0Al) sites.24. The process according to claim 17 , wherein the SAPO material has a structure type selected from the group consisting of AEI claim 17 , AFT claim 17 , AFX claim 17 , CHA claim 17 , EAB claim 17 , ERI claim 17 , KFI claim 17 , LEV claim 17 , SAS claim 17 , SAT claim 17 , and SAV.25. The process according to claim 24 , wherein the SAPO material has the CHA structure type.26. The process according to claim 25 , wherein the SAPO material is selected from the group consisting of SAPO-34 claim 25 , SAPO-44 claim 25 , and SAPO-47.27. The process according to claim 17 , wherein the ...

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Номер записи: 37
10-02-2022 дата публикации

Exhaust Gas Purifying Catalyst

Номер: US20220040635A1
Автор: AONO Norihiko, HORI Keigo, MIYASAKA Shu, SUGIOKA Daisuke, TANAKA Eriko, Tran Mai Huong
Принадлежит:

This exhaust gas purifying catalyst is provided with a substrate and a catalyst layer formed on a surface of the substrate. The catalyst layer contains zeolite particles that support a metal, and a rare earth element-containing compound that contains a rare earth element. The rare earth element-containing compound is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite is 0.001 to 0.014 in terms of oxides. 1. An exhaust gas purifying apparatus which is disposed in an exhaust pathway of an internal combustion engine and cleans exhaust gas emitted from the internal combustion engine , the apparatus comprising:an exhaust gas purifying catalyst comprising a substrate and a catalyst layer formed on a surface of the substrate, anda reducing agent supply mechanism which supplies a reducing agent for generation of ammonia to the exhaust gas at a position upstream in the exhaust pathway as compared to a position of the exhaust gas purifying catalyst, whereinthe catalyst layer contains zeolite particles that support a metal and that support a rare earth element-containing compound that contains lanthanum (La) as a rare earth element, andan amount of the rare earth element-containing compound contained is such an amount that a molar ratio of the rare earth element relative to Si contained in the zeolite particles is 0.001 to 0.014 in terms of oxides, whereinthe rare earth element-containing compound is disposed on a surface of the zeolite particles.2. The exhaust gas purifying apparatus according to claim 1 , wherein a relationship between an average particle diameter D1 of the zeolite particles and an average particle diameter D2 of the rare earth element-containing compound satisfies the following formula: 0.005<(D2/D1)<0.5.3. The exhaust gas purifying apparatus according to claim 1 , wherein an average particle diameter D2 of the rare earth element-containing compound is 100 nm or less.4. The exhaust gas purifying ...

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Номер записи: 38
10-02-2022 дата публикации

Exhaust Gas Purifying Catalyst

Номер: US20220040636A1
Автор: AONO Norihiko, HORI Keigo, MIYASAKA Shu, SUGIOKA Daisuke, TANAKA Eriko, Tran Mai Huong
Принадлежит:

This exhaust gas purifying catalyst is provided with a substrate and a catalyst layer formed on a surface of the substrate. The catalyst layer contains zeolite particles that support a metal, and a rare earth element-containing compound that contains a rare earth element. The rare earth element-containing compound is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite is 0.001 to 0.014 in terms of oxides. 1. A catalyst body which is used in an exhaust gas purifying catalyst , the catalyst body comprising:zeolite particles;a metal supported on the zeolite particles; anda rare earth element-containing compound disposed on a surface of the zeolite particles, whereinthe rare earth element-containing compound contains lanthanum (La) as a rare earth element, andan amount of the rare earth element-containing compound is such an amount that a molar ratio of the rare earth element relative to Si contained in the zeolite particles is 0.001 to 0.014 in terms of oxides.21221. The catalyst body according to claim 1 , wherein a relationship between an average particle diameter D of the zeolite particles and an average particle diameter D of the rare earth element-containing compound satisfies the following formula: 0.005<(D/D)<0.5.32. The catalyst body according to claim 1 , wherein an average particle diameter D of the rare earth element-containing compound is 100 nm or less.4. The catalyst body according to claim 1 , wherein when an amount of the rare earth element at a cross section of a zeolite particle is measured using an Electron Probe Micro Analyzer (EPMA) claim 1 , the amount of the rare earth element present at the surface of the zeolite particle is greater than the amount of the rare earth element present in the inner part of the zeolite particle.5. The catalyst body according to claim 1 , wherein the rare earth element-containing compound contains at least one of lanthanum oxide and lanthanum hydroxide.6. The ...

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Номер записи: 39
10-02-2022 дата публикации

NAPHTHA COMPLEX WITH THERMAL OXIDATION SYSTEM

Номер: US20220041527A1
Автор: Chan Raymond S., De Ren Jan, Khamidulin Eldar, Whyman William J.
Принадлежит:

A process for treating effluent streams in a naphtha complex is described. One or more of the sour water stripping unit for the NHT sour water from the NHT, the amine treatment unit and the caustic treatment unit for the NHT stripper off-gas, the caustic scrubber unit or other chloride treatment unit for the off-gas from the C-Cisomerization zone and the Cisomerization zone, and the caustic scrubber unit or other chloride treatment unit for the regenerator off-gas are replaced with a thermal oxidation system. 1. A process for treating off-gas and water effluent streams in a naphtha complex comprising:{'sub': 5', '6', '5', '6', '4', '4, 'claim-text': [{'sub': 5', '6', '4', '2', '2', '2', '2', '2, 'thermally oxidizing the at least one of the NHT stripper off-gas stream, the C-Cisomerization stabilizer off-gas stream, the regenerator off-gas stream, the Cisomerization stabilizer off-gas stream, and the NHT sour water stream in a thermal oxidizing section forming flue gas consisting essentially of at least one of HO, CO, N, O, SOx, NOx, HCl, Cl, dioxins, and furans;'}, 'optionally recovering waste heat from the flue gas in a waste heat recovery section;', {'sub': 2', '2', '2', '2', '2', '2, 'claim-text': quenching the flue gas in a quench section to form quenched flue gas after recovering the waste heat; and', {'sub': 3', '2', '2', '3', '2', '4', '2', '3', '2', '3', '4', '2', '4', '4, 'contacting a caustic solution or an NHbased solution with the quenched flue gas in scrubbing section to form the de-SOx outlet flue gas and a liquid stream comprising at least one of HO, NaSO, NaSO, NaHSO, NaCO, NaCl, (NH)SO, and NHCl;'}, 'or', {'sub': 2', '2', '2', '2', '2', '3', '2', '4', '3', '2', '4', '3', '3', '2', '2', '3', '4', '3', '2', '2', '3', '3', '2', '3', '2', '3', '2', '2, 'reacting the flue gas with a reactant in an SOx reaction section to form a reaction section flue gas consisting essentially of at least one of HO, CO, N, O, NaCl, NaCO, NaSO, NaNO, CaCl, CaSO, CaCO, Ca( ...

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Номер записи: 40
24-04-2014 дата публикации

Process and plant for producing cement clinker and for purifying the offgases formed

Номер: US20140109800A1
Автор: Franz-Josef Zurhove
Принадлежит: ELEX CEMCAT AG

The invention relates to a process and a plant for producing cement clinker and for purifying the off-gases formed thereby, wherein cement raw meal is preheated in a preheater by means of hot off-gases and then optionally precalcined, the preheated and optionally precalcined cement raw meal is burnt in a rotary kiln to form cement clinker, the cement clinker is cooled in a cooler, the hot off-gases used in the preheater are used in a raw mill for treating the cement raw meal, the dust content of a dust-containing mill off-gas thereby formed is reduced in a separating device to less than 5 g/Nm 3 , preferably less than 1 g/Nm 3 , alkali hydrogen carbonate and/or alkali carbonate is added to and mixed with the mill off-gas whose dust content has been reduced to less than 5 g/Nm 3 , and the mixed gas thereby formed is subsequently fed to a process filter for separation of dust laden with pollutants.

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Номер записи: 41
31-01-2019 дата публикации

Ultraviolet Treatment of Volatile Organic Compounds

Номер: US20190030477A1
Автор: Shatalov Maxim S.
Принадлежит: SENSOR ELECTRONIC TECHNOLOGY, INC.

A system for providing ultraviolet treatment of volatile organic compounds (VOCs) is disclosed. The system can include a first gas conduit to carry a stream of gas having VOCs and a second gas conduit to carry a second stream of gas containing a partial pressure of water vapor. A gas treatment unit can be coupled to the first gas conduit and the second gas conduit. The gas treatment unit can form hydroxyl radicals from the water vapor in the stream of gas carried by the second gas conduit and inject the radicals in the first gas conduit to decrease the presence of the VOCs. The gas treatment unit can include a photocatalyst component and at least one ultraviolet radiation source to irradiate the photocatalyst component with ultraviolet radiation. To this extent, the irradiated photocatalyst component disassociates the gas containing the water vapor to form the hydroxyl radicals. 1. A system , comprising:a first gas conduit having a primary inlet, a secondary inlet, and an outlet, wherein the first gas conduit is configured to carry a stream of gas having a presence of volatile organic compounds (VOCs) that enters the first conduit through the primary inlet and exits the first conduit at the outlet;a second gas conduit having an inlet that receives a stream of treatment gas containing at least a partial pressure of water vapor, an outlet coupled to the secondary inlet of the first gas conduit, and a radiative chamber formed between the inlet of the second gas conduit and the outlet of the second gas conduit to receive the stream of treatment gas;a photocatalyst component positioned within the radiative chamber of the second gas conduit; anda set of ultraviolet radiation sources to irradiate the photocatalyst component with ultraviolet radiation, wherein the irradiated photocatalyst component disassociates the treatment gas into hydroxyl radicals, wherein the photocatalyst component is positioned at a predetermined distance from the outlet of the second gas conduit, ...

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Номер записи: 42
30-01-2020 дата публикации

CROSS-FLOW HEAT EXCHANGER

Номер: US20200030743A1
Автор: Bruno Lorenzo, Carlessi Lino, Galati Rosario
Принадлежит:

A counter-current cross-flow heat exchanger for heating a first gas and cooling a second gas, includes modules in fluid communication with one another, each module being positioned on a plane, the planes mutually overlapping. Conduits allow entry and exit of the first and second gases into and out of the exchanger. Each module has heat exchange plates, with heating and cooling faces. The plates are orthogonal to the module plane and parallel to define alternating heating and cooling spaces. The first gas crosses each heating space with a direction substantially parallel to the plane of each module and the second gas crosses each cooling space with a direction substantially orthogonal to the plane of each module. The cooling spaces between adjacent modules are in direct fluid communication. The heating spaces between adjacent modules are in fluid communication with one another by conduits/conveyors, creating a serpentine path. 1. A counter-current cross-flow heat exchanger for heating a first gas represented by SOand cooling a second gas represented by SO , comprising a plurality of modules in fluid communication with one another , each module being positioned on a plane , said planes being mutually overlapping , further comprising conduits for the entry of said first gas , conduits for entry of said second gas and conduits for exit of said first gas and conduits for exit of said second gas into and out of the exchanger , each module comprising a plurality of heat exchange plates , each plate having a heating face and a cooling face , said plates being positioned orthogonal to the plane of each module and parallel to one another to define heating spaces between said heating faces , and cooling spaces between said cooling faces , said heating spaces and cooling spaces alternating relative to one another , wherein said first gas crosses the exchanger from a lower module to an upper module crossing each heating space with a direction substantially parallel to the plane ...

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Номер записи: 43
05-02-2015 дата публикации

AMMONIA SLIP CATALYST

Номер: US20150037233A1
Автор: ANDERSEN PAUL JOSEPH, Chen Hai-Ying, COX JULIAN PETER, Doura Kevin, FEDEYKO JOSEPH MICHAEL, WEIGERT ERICH CONLAN
Принадлежит:

Provided is an ammonia slip catalyst article having supported palladium in a top or upstream layer for oxidation of carbon monoxide and/or hydrocarbons, an SCR catalyst either in the top layer or in a separate lower or downstream layer, and an ammonia oxidation catalyst in a bottom layer. Also provided are methods for treating an exhaust gas using the catalyst article, wherein the treatment involves reducing the concentrations of ammonia and optionally carbon monoxide and/or hydrocarbons in the exhaust gas. 1. A catalyst article for treating exhaust gas comprising a substrate having a first catalyst layer disposed on and/or within the substrate and a second catalyst layer coated over the first catalyst layer; wherein the first catalyst layer comprises a first oxidation catalyst and the second catalyst layer contains a mixture of (i) a second oxidation catalyst consisting of supported palladium and (ii) a catalyst for selectively reducing NOand/or storing NH; and wherein the first and second oxidation catalysts are different formulations.2. The catalyst article of claim 1 , wherein the second catalyst layer is essentially free of Ag claim 1 , Au claim 1 , Pt claim 1 , Rh claim 1 , Ru claim 1 , Ir claim 1 , and Os.3. The catalyst article of claim 1 , wherein the first oxidation catalyst is a supported noble metal.4. The catalyst article of claim 1 , wherein the first oxidation catalyst is Pt supported on metal oxide particles or a mixture of Pt and Pd supported on metal oxide particles.5. The catalyst article of claim 1 , wherein the catalyst for selectively reducing NOand/or storing NHis a Fe and/or Cu loaded zeolite.6. The catalyst of claim 1 , wherein the substrate is a flow-through honeycomb having a wall porosity of about 50-65%.7. The catalyst article of claim 6 , wherein a majority of the first catalyst layer is disposed within the substrate walls and a majority of the second catalyst layer is disposed on the surface of the substrate walls.8. A catalyst article ...

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Номер записи: 44
01-05-2014 дата публикации

ELECTRO-CATALYTIC HONEYCOMB FOR EXHAUST EMISSIONS CONTROL

Номер: US20140120003A1
Автор: Huang Ta-Jen
Принадлежит:

An electro-catalytic honeycomb for controlling exhaust emissions, which adopts to purify a lean-burn exhaust, comprises a honeycomb structural body, a solid-oxide layer and a cathode layer. The honeycomb structural body includes an anode, a plurality of gas channels, and a shell. The anode is formed as a backbone, the gas channels are formed inside the backbone for passing the exhaust, and the shell covers an outer surface of the anode. The solid-oxide layer is adhered to an inner surface of the anode and connects the shell so as to encapsulate the anode. The cathode layer is adhered to a tube wall of the solid-oxide layer and has an oxidizing environment. The anode has a reducing environment. The reducing and the oxidizing environment facilitate an electromotive force to occur between the anode and the cathode layer to promote a decomposition of nitrogen oxides of the exhaust into nitrogen and oxygen. 1. An electro-catalytic honeycomb for controlling exhaust emissions , which adopts to purify a lean-burn exhaust , comprising:a honeycomb structural body comprising an anode which is formed as a backbone of the honeycomb structural body, a plurality of gas channels formed inside the backbone for passing the lean-burn exhaust, and a shell covering an outer surface of the anode, the anode being made of a first porous material and having a reducing environment, and the shell being formed of a first dense structure;a solid-oxide layer adhering to an inner surface of the anode opposite to the outer surface and connecting the shell so as to encapsulate the anode completely, and the solid-oxide layer being formed of a second dense structure and having a tube wall facing the gas channels; anda cathode layer adhering to the tube wall which is made of a second porous material and has an oxidizing environment, and the solid-oxide layer being disposed between the anode and the cathode layer;wherein the reducing environment and the oxidizing environment facilitates an ...

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Номер записи: 45
05-02-2015 дата публикации

ITQ-49 MATERIAL, METHOD FOR THE PRODUCTION THEREOF AND USE OF SAME

Номер: US20150038756A1
Автор: CORMA CANOS Avelino, HERNANDEZ RODRIGUEZ Manuel, Jordá Moret Jose Luis, Rey Garcia Fernando
Принадлежит:

The present invention refers to a microporous crystalline material, to the method for the production thereof and to the use of same, the material having a composition: 2. The microporous crystalline material according to claim 1 , whereinY is selected from Ti, Sn, Zr, or mixtures thereof;the value of (y+z)/x is comprised between 20 and infinity; andthe value of z/y is comprised between 15 and infinity.3. The microporous crystalline material according to claim 1 , wherein Z is Si.4. The microporous crystalline material according to claim 1 , wherein x is zero and having a chemical composition:{'br': None, 'i': y', ':z, 'sub': 2', '2, 'YOZO'}6. The microporous crystalline material according to claim 5 , wherein the value of z/x is comprised between 20 and infinity.10. The microporous crystalline material according to claim 9 , wherein the value z/x is comprised between 20 and infinity.12. The microporous crystalline material according to claim 11 , wherein the structure directing agent claim 11 , R claim 11 , contains P.13. The microporous crystalline material according to claim 12 , wherein R is a salt of an alkylphosphonium cation.14. The microporous crystalline material according to claim 13 , wherein R is 1 claim 13 ,4-butanediyl-bis(tritertbutyl)phosphonium hydroxide.17. The microporous crystalline material according to claim 16 , wherein the value of z/x is comprised between 20 and infinity.18. The microporous crystalline material according to claim 1 , wherein it has atoms in tetrahedral coordination linked through oxygen bridging atoms that connect adjacent atoms with tetrahedral coordination claim 1 , containing 92 atoms in tetrahedral coordination in its unit cell claim 1 , designated T1 claim 1 , T2 claim 1 , T3 claim 1 , T4 until T92 claim 1 , that are located in the crystallographic positions with cartesian coordinates x claim 1 , y y z shown in Table 1.20. The process for the preparation of a material according to claim 19 , wherein Z is Si claim 19 , Ge ...

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Номер записи: 46
11-02-2016 дата публикации

Small Pore Molecular Sieve Supported Copper Catalysts Durable Against Lean/Rich Aging for the Reduction of Nitrogen Oxides

Номер: US20160038876A1
Автор: ANDERSEN PAUL JOSEPH, Chen Hai-Ying, FEDEYKO JOSEPH MICHAEL, WEIGERT ERICH
Принадлежит:

Provided is a system for treating a flowing exhaust gas comprising a lean NOx trap, a catalyzed soot filter, an ammonia or an ammonia precursor metering system for metering ammonia or an ammonia precursor into the flowing exhaust gas; and an SCR catalyst, wherein the SCR catalyst is disposed downstream of the lean NOx trap and comprises copper and/or iron supported on a small pore molecular sieve. 1. A system for treating a flowing exhaust gas comprising:(a) a lean NOx trap;(b) a catalyzed soot filter;(c) an ammonia or an ammonia precursor metering system for metering ammonia or an ammonia precursor into the flowing exhaust gas; and(d) an SCR catalyst, wherein the SCR catalyst is disposed downstream of the lean NOx trap and comprises copper and/or iron supported on a small pore molecular sieve.2. The system of claim 1 , wherein said metering is controlled in response to the quantity of nitrogen oxides in the exhaust gas.3. The system of claim 1 , wherein the small pore molecular sieve has a framework selected from AEI claim 1 , AFT claim 1 , AFX claim 1 , CHA claim 1 , DDR claim 1 , ERI claim 1 , LEV claim 1 , KFI claim 1 , and SAV.4. The system of claim 1 , wherein the small pore molecular sieve is a SAPO.5. The system of claim 1 , wherein the small pore molecular sieve has a silica-to-alumina ratio of 8 to 150.6. The system of claim 1 , wherein the small pore molecular sieve has a CHA framework.7. The system of claim 1 , wherein the small pore molecular sieve has an AEI framework.8. The system of claim 1 , wherein the catalyzed soot filter comprises a copper-loaded small pore molecular sieve.9. The system of claim 1 , wherein the SCR catalyst is coated on flow-through monolith.10. The system of claim 1 , wherein the catalyzed soot filter is coated with an SCR catalyst. This application is a continuation of U.S. patent application Ser. No. 14/262,052, filed Apr. 4, 2014 (allowed), which is a continuation of U.S. patent application Ser. No. 13/959,369 (now granted ...

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Номер записи: 47
11-02-2016 дата публикации

CATALYSTS POSSESSING AN IMPROVED RESISTANCE TO POISONING

Номер: US20160038920A1
Автор: Guo Xiaoyu
Принадлежит:

The present invention relates generally to the field of catalysts for use in connection with one or more types of emissions control (e.g., emissions control associated with the combustion of one or more types of fossil fuel) and, in particular to catalyst compositions that possess an improved resistance to at least one type of poisoning. In another embodiment, the catalysts of the present invention are designed to be utilized in conjunction with an SCR and possess an improved resistance to phosphorus poisoning. 1. A poison-resistant SCR catalyst composition comprising:(i) at least one vanadium compound or metal;(ii) at least one tungsten compound or metal;(iii) at least one titanium compound or metal; and(iv) at least one additional compound selected from one or more molybdenum compounds or metal,{'sub': 2', '3, 'wherein poison-resistance in the SCR catalyst is achieved due to the molar ratio of the metal portion of component (iv) to the metal portion of component (i) falling in the range of about 10:1 to about 1:1 and wherein the catalyst composition has an SOto SOconversion, or oxidation, rate that is about 2 percent or less.'}2. The catalyst composition of claim 1 , wherein the molar ratio of the metal portion of component (iv) to the metal portion of component (i) is in the range of about 9:1 to about 1:1.3. The catalyst composition of claim 1 , wherein the molar ratio of the metal portion of component (iv) to the metal portion of component (i) is in the range of about 8:1 to about 1:1.4. The catalyst composition of claim 1 , wherein the molar ratio of the metal portion of component (iv) to the metal portion of component (i) is in the range of about 7:1 to about 1:1.5. The catalyst composition of claim 1 , wherein the molar ratio of the metal portion of component (iv) to the metal portion of component (i) is in the range of about 4:1 to about 1:1.6. The catalyst composition of claim 1 , wherein the molar ratio of the metal portion of component (iv) to the metal ...

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Номер записи: 48
09-02-2017 дата публикации

Combined oxidation and absorption of nox by an ionic liquid tandem process

Номер: US20170036164A1
Автор: Anders Riisager, Anders Theilgaard MADSEN, Andreas Jonas Kunov-Kruse, Peter Thomassen, Rasmus Fehrmann, Susanne L. Mossin
Принадлежит: Danmarks Tekniskie Universitet

The present invention relates to a new strategy for capturing NO x using a two-step process.

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Номер записи: 49
09-02-2017 дата публикации

METHOD AND SYSTEM FOR THE DENITRIFICATION OF FLUE GASES BY MEANS OF SNCR (SELECTIVE NON-CATALYTIC REDUCTION) AND DOWNSTREAM CATALYST FOR AMMONIA DECOMPOSITION

Номер: US20170038147A1
Автор: SCHÜRMANN Heiko
Принадлежит:

A method for denitrification of flue gases and a system, wherein flue gases generated in a rotary kiln are conveyed to a calcining zone for the deacidification of raw cement meal. Aqueous ammonia solution, ammonia, or ammonia-releasing substances for denitrifying the flue gases injected into the calcining zone according to the method of selective non-catalytic reduction (SNCR), and the flue gas stream, together with an ammonia slip generated during the denitrification, is passed through a heat exchanger and through at least one dedusting device. The flue gas is guided through a exhaust gas line via a catalyst for the decomposition of excess ammonia with residues of nitrogen oxide in accordance with a method of selective catalytic reduction (SCR), wherein the catalyst is arranged in a reactor provided in the exhaust line, and is no larger than is required for a sufficient decomposition of the ammonia. 1. A method of denoxing flue gases comprising:guiding flue gases which arise in a rotary kiln for sintering of cement clinker into a calcination zone for deacidification of raw meal,injecting aqueous ammonia solution, ammonia or substances that release ammonia for denoxing of the flue gases by the method of selective noncatalytic reduction (SNCR) into the calcination zone, and{'b': '10', 'guiding the flue gas stream together with any ammonia slip that arises in the denoxing through a heat exchanger and at least one device for dedusting (),'}whereinthe flue gas stream is conducted from the heat exchanger through a heat exchanger offgas conduit via a catalyst for degradation of excess ammonia with residues of nitrogen oxide present in the flue gas over the catalyst in accordance with a method of selective catalytic reduction (SCR), and,wherein the catalyst is disposed in a reactor provided within the heat exchanger offgas conduit and dimensions of the catalyst are only as great as required for the given degree of ammonia degradation in the particular case.2. The method as ...

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Номер записи: 50
24-02-2022 дата публикации

STRUCTURED MONOLITHIC CATALYST FOR REDUCING NOX EMISSION IN FLUE GAS, THE PREPARATION METHOD AND THE USE THEREOF

Номер: US20220054977A1
Автор: DA Zhijian, JIANG Qiuqiao, Lin Wei, Song Haitao, TIAN Huiping, WANG Peng, YAN Jiasong, Zhang Jiushun
Принадлежит:

A structured monolithic catalyst has a structured monolithic carrier and a coating of active components. The coating of active components comprises active metal components and a substrate. The active metal components conclude a first metal element, a second metal element, a third metal element and a fourth metal element. The first metal element includes Fe and Co; the second metal element is at least one selected from the group consisting of the metal elements of the Group IA and/or IIA; the third metal element is at least one selected from the group consisting of the non-noble metal elements of the Groups IB to VIIB; and the fourth metal element is at least one selected from the group consisting of the noble metal elements. 1. A structured monolithic catalyst for reducing NOx emission in flue gas , comprising: a structured monolithic carrier and a coating of active components disposed on inner surface and/or outer surface of the structured monolithic carrier , wherein , based on the total weight of the catalyst , the coating of active components is presented in an amount of about 1-50 wt % , wherein the coating of active components comprises active metal components and a substrate , wherein the active metal components comprise a first metal element , a second metal element , a third metal element and a fourth metal element , wherein the first metal element is selected from the group consisting of the non-noble metal elements of the Group VIII , wherein the first metal element includes Fe and Co , wherein the weight ratio of Fe and Co is 1:(0.05-20) on an oxide basis , wherein the second metal element is at least one selected from the group consisting of the metal elements of the Group IA and/or IIA , wherein the third metal element is at least one selected from the group consisting of the non-noble metal elements of the Groups IB to VIIB , and wherein the fourth metal element is at least one selected from the group consisting of the noble metal elements.2. The ...

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Номер записи: 51
24-02-2022 дата публикации

A method for production of vanadium catalysts

Номер: US20220055018A1
Автор: FENG Yang, Feng Zhao, Jia Di Zhang, LIANG Chen
Принадлежит: BASF Corp

A method for production of vanadium catalysts, including steps of 1) providing a mixture comprising a TiO2-based support and a composite oxide containing vanadium and antimony; 2) preparing a slurry containing the mixture obtained from step 1), and additive comprising at least one species selected from the group consisting of Si, Al, Zr, Ti, W and Mo, and a solvent; and 3) applying the slurry onto a substrate or processing the slurry into shaped bodies. The vanadium catalysts obtained/obtainable from the method, and use thereof for abatement of nitrogen oxides (NOx).

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Номер записи: 52
03-03-2022 дата публикации

PREPARATION METHOD AND APPLICATION OF METAL BISMUTH DEPOSITED BISMUTH-BASED PHOTOCATALYST

Номер: US20220062865A1
Автор: Gao Ting, Wang Chuanyi, Zhu Qiuhui
Принадлежит:

A method of forming a bismuth-based catalyst can include mixing an inorganic alkali compound, a bismuth source compound, a transition metal precursor, and a reducing agent in an aqueous solution to form a bismuth precursor liquid. The bismuth precursor liquid can be hydrothermally reacted at a conversion temperature for a conversion time to produce the bismuth-based catalyst.

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Номер записи: 53
14-02-2019 дата публикации

METHOD FOR PREPARING MOLECULAR SIEVE-MULTIELEMENT OXIDE COMPOSITE INTEGRALLY EXTRUDED DENITRATION CATALYST

Номер: US20190046962A1
Автор: Cui Ming, HU Baohua, Li Quansheng, LIU Xiaoling, Sun Li, TANG Yingjie, WANG Yuchang, XU Yongzhen, ZHOU Zhenlei
Принадлежит: VALIANT CO., LTD.

Disclosed is a preparation method for a molecular sieve-multiple oxide composite integral extrusion type denitration catalyst, belonging to the technical fields of atmosphere pollution control and environment-friendly catalytic materials. The preparation method comprises: constructing an organic structure coating on the surface of a metal ion-exchanged molecular sieves and synchronously adding multiple oxide components, thus obtaining an ion-exchanged molecular sieve-multiple oxide composite denitration catalyst active component; and then mixing, kneading into paste, staling, carrying out integral extrusion forming, drying, and calcining, thus obtaining the integral extrusion type denitration catalyst. The molecular sieve-multiple oxide composite integral extraction type denitration catalyst has a denitration efficiency more than 80% at the temperature ranging from 250° C. to 420° C. in the presence of 10% steam and 500 ppm sulfuric dioxide. According to the present invention, the application field of metal-loaded molecular sieve denitration catalysts is widened, and thus the metal-loaded molecular sieve denitration catalysts can be widely applied to the flue gas denitration of stationary sources. 1. A method for preparing a molecular sieve-multiple oxide composite integral extrusion type denitration catalyst , comprising the following steps:(1) mixing a metal salt solution of one or two of manganese, iron, cobalt, nickel, copper, or cerium with molecular sieves; and after an ion exchange reaction, adding a surfactant and simultaneously carrying out shear emulsification and dispersion treatment to obtain an ion-exchanged molecular sieve slurry;(2) preparing an acidic precursor solution from a mixture of a metal salt of one or two of manganese, iron, cobalt, nickel, copper, or cerium with one or more of an aluminum source, a titanium source, or a zirconium source; preparing an alkaline precursor solution from an alkaline silicon source; and mixing the acidic ...

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Номер записи: 54
13-02-2020 дата публикации

Exhaust gas purifying catalyst

Номер: US20200047119A1
Автор: Daisuke SUGIOKA, Eriko Tanaka, Keigo Hori, Mai Huong Tran, Norihiko Aono, Shu MIYASAKA
Принадлежит: Cataler Corp

This exhaust gas purifying catalyst is provided with a substrate 10 and a catalyst layer 20 formed on a surface of the substrate 10 . The catalyst layer 20 contains zeolite particles 22 that support a metal, and a rare earth element-containing compound 24 that contains a rare earth element. The rare earth element-containing compound 24 is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite 22 is 0.001 to 0.014 in terms of oxides.

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Номер записи: 55
13-02-2020 дата публикации

TRANSITION METAL-CARRYING ZEOLITE AND PRODUCTION METHOD THEREFOR, AND NITROGEN OXIDE PURIFICATION CATALYST AND METHOD FOR USING SAME

Номер: US20200047168A1
Автор: HOTTA Yuusuke, MATSUO Takeshi, Takewaki Takahiko, TANAKA Manabu
Принадлежит: MITSUBISHI CHEMICAL CORPORATION

This transition metal-loaded zeolite is configured such that an absorption intensity ratio in a specific region of the transition metal-loaded zeolite observed by ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR) and an intensity ratio of a maximum peak in a different temperature range of the transition metal-loaded zeolite measured by ammonia temperature-programmed desorption, respectively fall within specific ranges. 1. A transition metal-loaded zeolite , comprisingzeolite having a structure designated as AEI or AFX according to a code system defined by International Zeolite Association (IZA), and comprising at least a silicon atom and an aluminum atom in a framework structure thereof, anda transition metal M loaded thereon,wherein the transition metal-loaded zeolite satisfies (1) and (2): {'br': None, 'sup': −1', '−1, 'Intensity (32,500 cm)/Intensity (12,500 cm)\u2003\u2003(I) and'}, '(1) a ratio of absorption intensity based on ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR), which is obtained according to expression (I), is less than 0.4;'}{'sub': 3', '3', '200-400', '3', '450-600, '(2) a peak intensity obtained according to ammonia temperature-programmed desorption (NH-TPD) exists in at least each of a range of 200° C. to 400° C. and a range of 450° C. to 600° C. and a ratio of a maximum peak intensity in the range of 200° C. to 400° C. to a maximum peak intensity in the range of 450° C. to 600° C. (NH-TPD/NH-TPD) is 1.0 or more and 2.0 or less.'}2. The transition metal-loaded zeolite according to claim 1 , further satisfying (3):(3) a molar ratio M/Al is 0.1 or more and 0.35 or less.3. The transition metal-loaded zeolite according to claim 1 , wherein the ratio of absorption intensity based on ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR) is less than 0.3.4. The transition metal-loaded zeolite according to claim 1 , wherein the ratio of absorption intensity based on ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR ...

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Номер записи: 56
22-02-2018 дата публикации

METHOD OF SIMULTANEOUS REMOVAL OF NO AND CARBON PARTICLES AND INORGANIC DUST FROM FLUE GASES AND CATALYTIC REACTOR FOR REMOVAL OF NO AND CARBON PARTICLES AND INORGANIC DUST FROM FLUE GASES

Номер: US20180050306A1
Автор: BUDZIOCH Janusz, DANIELEWSKI Marek, LECH Ryszard, Najbar Mieczyslawa
Принадлежит:

The method of simultaneous removal of NO and carbonic particles and inorganic dust from flue gases in the reactor equipped with the catalyst for direct decomposition of nitric oxide located on a metallic monolith consists in tangential introduction of flue gases to the reactor circumfer-ence generating rotational flow of the flue gases downwards of the reactor with simultaneous flow disturbance due to flue gases contact with undulating surface of metallic foil located on an inner wall of the reactor chamber and split of the flue gases by contact with the catalyst located on a spiral band falling to the lower part of the reactor, and next flue gases jet direction counter-currently to a cylindrical inner chamber containing the slices of the monolithic catalyst disturbing laminar flow of the flue gases jet. The deposited solid particles of the pollutants are collected in the lower part of the re-actor. The invention concerns also the reactor designed for simultaneous removal of NO and carbon particles and inorganic dust from flue gases. 128-. (canceled)29. A method comprising: wherein the body includes a heated annular inner wall with an undulating inner wall surface,', 'and wherein the received flue gases are directed to move rotationally within the body by the inner wall,, 'a) receiving flue gasses into a reactor including a body,'}b) directing the rotationally moving flue gasses downwardly within the body by engagement with a spiral band coated with a catalyst operative to directly remove NO from the gasses, 'wherein the chamber includes a plurality of slices including the catalyst,', 'c) enabling the gas that has been directed downwardly by the band to pass upwardly through a cylindrical heated chamber within the body to a flue gas outlet from the body,'}whereby NO, carbonic particles and inorganic dust are removed from the gas by the reactor.30. The method of claim 29 , wherein in the chamber the plurality of slices extend parallel to one another and at least one ...

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Номер записи: 57
10-03-2022 дата публикации

IONIC OXIDATION REFRESHING SYSTEM AND METHOD

Номер: US20220072170A1
Автор: Razouki Aram
Принадлежит:

An ionic oxidation refreshing system for refreshing an odorized item, comprising an enclosure with an airflow system to contact the odorized item on all sides; an ionization system that produces a positively charged ionized ozone gas mixture inside of the enclosure, killing germs, including odor-causing bacteria, viruses, molds, and fungus, and provides the odorized item inside the enclosure with a net positive charge; a filter that neutralizes and filters out any toxic by-products; an electrostatic liquid atomization system that creates a fine mist of a quick-cleaning solution, and, in conjunction with the airflow system, causes solution droplets to penetrate deep into the odorized item and agitate a surface of the odorized item, ensuring the formula is evenly delivered onto the odorized item without over saturating any area. 1. An ionic oxidation refreshing system for refreshing an odorized item , comprising:an enclosure with an airflow system to contact the odorized item on all sides;an ionization system that produces a positively charged ionized ozone gas mixture inside of the enclosure, killing germs, including odor-causing bacteria, viruses, molds, and fungus, and provides the odorized item inside the enclosure with a net positive charge;a filter that neutralizes and filters out any toxic by-products;an electrostatic liquid atomization system that creates a fine mist of a quick-cleaning solution, and, in conjunction with the airflow system, causes solution droplets to penetrate deep into the odorized item and agitate a surface of the odorized item, ensuring the formula is evenly delivered onto the odorized item without over saturating any area.2. The ionic oxidation refreshing system of claim 1 , wherein the airflow system includes a plurality of movable high-speed air blades that deliver air blade streams of the fine mist of quick-cleaning solution claim 1 , the high-speed air blades configured to create surface tension on the odorized item to smooth and ...

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Номер записи: 58
01-03-2018 дата публикации

Copper cha zeolite catalysts

Номер: US20180056281A1
Автор: Ahmad Moini, Gerald Stephen Koermer, Ivor Bull, Joseph A. Patchett, Joseph C. Dettling, Matthew Tyler Caudle, Patrick Burk, R. Samuel Boorse, Wen-Mei Xue, William M. Jaglowski
Принадлежит: BASF Corp

Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.

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Номер записи: 59
21-02-2019 дата публикации

Dust removal and desulfurization of fcc exhaust gas

Номер: US20190054419A1
Автор: Jing Luo, Jun Zhang, Qiang Tan, Xiangjun Xu, Yongying LUO
Принадлежит: Jiangnan Environmental Protection Group Inc

Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by an ammonia-based process. The apparatus may include a first-stage waste heat recovery system, a denitrification system, a dust removal and desulfurization system, a tail gas exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include a dedusting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.

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Номер записи: 60
05-03-2015 дата публикации

ZEIOLITE CATALYST CONTAINING METAL

Номер: US20150064074A1
Автор: Ballinger Todd Howard, BLAKEMAN PHILIP GERALD, CHANDLER GUY RICHARD, Chen Hai-Ying, COX JULIAN PETER, FEDEYKO JOSEPH MICHAEL, GREEN ALEXANDER NICHOLAS MICHAEL, PHILLIPS PAUL RICHARD, REID STUART DAVID, WEIGERT ERICH CONLAN, WYLIE JAMES ALEXANDER
Принадлежит:

A catalyst composition is provided wherein the composition includes a zeolite having a non-phosphorous CHA crystal structure and having a mean crystalline size of about 1 to about 5 microns; and at least one non-aluminum base metal present in an amount sufficient to achieve a NOx conversion of at least about 65% at a temperature of at least 450° C. 1. A catalyst composition comprising:a. a zeolite having a non-phosphorous CHA crystal structure and having a mean crystalline size of about 1 to about 5 microns; andb. at least one non-aluminum base metal present in an amount sufficient to achieve a NOx conversion of at least about 65% at a temperature of at least 450° C.2. The catalyst composition of claim 1 , wherein the non-aluminum base metal present in an amount sufficient to achieve a NOx conversion of at least about 75% at a temperature of at least 550° C.3. The catalyst composition of claim 1 , wherein the non-aluminum base metal present in an amount sufficient to achieve a NOx conversion of at least about 85% at a temperature of at least 650° C.41. The catalyst composition of claim 1 , wherein the non-aluminum base metal present in an amount sufficient to achieve a NOx conversion of at least about 70 percent over at temperature range of 250-650° C.5. The catalyst composition of claim 1 , wherein the NOx conversion of at least about 80 percent and a N2 selectivity of at least about 85% over at temperature range of 250-650° C.6. The catalyst composition of claim 1 , wherein non-aluminum base metal is selected from Cr claim 1 , Ce claim 1 , Mn claim 1 , Fe claim 1 , Co claim 1 , Ni and Cu.7. The catalyst composition of claim 1 , wherein non-aluminum base metal is Cu.8. The catalyst composition of claim 1 , wherein the non-aluminum base metal is included by ion exchanged.9. The catalyst composition of claim 1 , wherein the non-aluminum base metal is included by incipient wetness.10. The catalyst composition of claim 1 , wherein the non-aluminum base metal is ...

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Номер записи: 61
05-03-2015 дата публикации

ZEOLITE BLEND CATALYSTS FOR TREATING EXHAUST GAS

Номер: US20150064088A1
Автор: CHANDLER GUY RICHARD, GREEN ALEXANDER NICHOLAS MICHAEL, PHILLIPS PAUL RICHARD
Принадлежит:

Provided is an improved catalyst for treating exhaust gas, particularly for selectively reducing NO, and methods for using the same, wherein the catalyst includes a blend of a transition metal promoted zeolite and an un-promoted zeolite, wherein both zeolites have the same framework type. 1. A catalyst for treating an exhaust gas comprising a blend of a transition metal-promoted first zeolite and a second zeolite primarily in at least one of Hform , NHform , alkali metal form , or alkaline-earth metal form , wherein the first and second zeolites have the same framework structure and the framework structure is selected from CHA , AEI , AFX , LEV , and SFW.2. The catalyst of claim 1 , wherein the first zeolite is exchanged with copper.3. The catalyst of claim 1 , wherein the second zeolite contains calcium.4. The catalyst of claim 1 , wherein the second zeolite is essentially free of transition metals.5. The catalyst of claim 1 , wherein the second zeolite is essentially free of non-framework metals.6. The catalyst of claim 1 , wherein the first zeolite and the second zeolite have different silica-to-alumina ratios.7. The catalyst of claim 1 , wherein the first zeolite has lower silica-to-alumina ratio relative to the second zeolite.8. The catalyst of claim 1 , wherein the first zeolite and the second zeolite independently have an silica-to-alumina ratio of about 10 to about 35.9. The catalyst of claim 1 , wherein the first and second zeolites have the same silica-to-alumina ratio.10. The catalyst of claim 1 , wherein the second and first zeolites are present in a relative ratio of about 0.1 to about 1.11. The catalyst of claim 1 , wherein the first and second zeolites have a CHA framework.12. The catalyst of claim 1 , wherein the first and second zeolites have an AEI framework.13. A catalytic article for treating an exhaust gas comprising a porous honeycomb substrate containing a catalyst according to .14. A method for treating an exhaust gas comprising contacting an ...

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Номер записи: 62
10-03-2016 дата публикации

AN IMPROVED METHOD OF PREPARATION OF NANOPARTICULAR METAL OXIDE CATALYSTS

Номер: US20160067678A1
Автор: Fehrmann Rasmus, KRISTENSEN Steffen Buus, Kunov-Kruse Andreas Jonas, Riisager Anders
Принадлежит: DANMARKS TEKNISKE UNIVERSITET

The disclosure concerns an improved method of preparation of nanoparticular vanadium oxide/anatase titania catalysts having a narrow particle size distribution. In particular, the disclosure concerns preparation of nanoparticular vanadium oxide/anatase titania catalyst precursors comprising combustible crystallization seeds upon which the catalyst metal oxide is coprecipitated with the carrier metal oxide, which crystallization seeds are removed by combustion in a final calcining step. 1. A method of preparation of nano-sized particular vanadium oxide/anatase titania catalysts , the nano-sized particular vanadium oxide/anatase titania catalysts comprising an anatase titania carrier and a catalytically active vanadium oxide component , the method comprising the following steps:a) providing a solution of an ammonium salt in a first solvent;b) providing a solution of one or more hydrolysable titania precursors and one or more hydrolysable vanadium precursors in a second solvent;c) combining the solutions of step a) and b) under acidic, aqueous conditions using hydrochloric acid, sulphuric acid or nitric acid, thereby hydrolyzing the one or more hydrolysable titania precursors and the one or more hydrolysable vanadium precursors;d) aging the reaction mixture of step c) thereby allowing the hydrolytic processes to proceed substantially to completion, thereby providing nano-sized particular titania catalyst precursors comprising crystallization seeds upon which the vanadium oxide is co-precipitated with the titania carrier material; i) drying at atmospheric pressure and temperatures between 50° C. and 120° C. for between 50 hours and 200 hours, or', 'ii) spray drying at temperatures between 50° C. and 120° C., and, 'e) removing solvents and volatile reaction components by either'}f) calcining the nano-sized particular titania catalysts precursor at temperature above 380° C.2. A method according to wherein the aging in step d) proceeds for between 0.5 and 8 hours.3. A ...

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Номер записи: 63
27-02-2020 дата публикации

A METHOD FOR REMOVING NITROGEN OXIDES FROM A GAS USING AN IRON EXCHANGED ZEOLITE CATALYST

Номер: US20200061536A1
Автор: Granger Jean Francois
Принадлежит:

A method for removing nitrogen oxides NOx from a gaseous current, comprising the steps of: passing the gaseous current through a de-NOx catalytic bed with iron exchanged zeolite as a catalyst with the addition of ammonia as a reducing agent, wherein the molar ratio of NH3 over NOx is greater than 1.33. 111-. (canceled)12. A method for removing nitrogen oxides NOx from a gaseous current , the method comprising:passing the gaseous current through a de-NOx catalytic bed including a catalyst that is an iron exchanged zeolite, with an addition of ammonia as a reducing agent;wherein a molar ratio of NH3 over NOx in the gas admitted to said de-NOx catalytic bed is 1.4 to 2;wherein said de-NOx catalytic bed is operated at a temperature in a range of 420° C. to 435° C.; and{'sup': −1', '−1, 'wherein a space velocity in said de-NOx catalytic bed is 10000 hto 14000 h.'}13. The method according to claim 12 , wherein said molar ratio of NH3 over NOx is 1.4 to 1.6.14. The method according to claim 13 , wherein said molar ratio of NH3 over NOx is 1.5.15. The method according to claim 12 , wherein claim 12 , after the passage though said de-NOx catalytic bed claim 12 , a residual amount of NOx in the gas is not greater than 100 ppm.16. The method according to claim 12 , wherein claim 12 , after the passage though said de-NOx catalytic bed claim 12 , a residual amount of NOx in the gas is not greater than 50 ppm.17. The method according to claim 12 , wherein claim 12 , after the passage though said de-NOx catalytic bed claim 12 , a residual amount of NOx in the gas is not greater than 25 ppm.18. The method according to claim 12 , wherein the temperature at which said de-NOx catalytic bed is operated is 430° C.19. The method according to claim 12 , wherein the iron exchanged zeolite catalyst includes MFI claim 12 , BEA claim 12 , FER claim 12 , MOR claim 12 , FAU claim 12 , MEL claim 12 , or combinations thereof.20. The method according to claim 12 , wherein the iron exchanged ...

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Номер записи: 64
27-02-2020 дата публикации

Selective catalytic reduction process and off-line regeneration of deactivated catalyst of the process

Номер: US20200061538A1
Автор: Guido SENG
Принадлежит: SHELL OIL COMPANY

Presented is a process for the off-line regeneration of a deactivated nitrogen oxide decomposition catalyst of a selective catalytic reduction system that is a component of a flue gas treating system. The selective catalytic reduction system is isolated to allow for removal and replacement of deactivated SCR catalyst. The removed SCR catalyst may be regenerated off-line from the flue gas treating system. The off-line regenerated SCR catalyst can be used as a replacement SCR catalyst.

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Номер записи: 65
27-02-2020 дата публикации

Low-silica chabazite zeolites with high acidity

Номер: US20200061594A1
Автор: Anton Petushkov, Bjorn Moden, Hong-Xin Li, Lifeng Wang
Принадлежит: PQ Corp

A microporous crystalline material having a molar silica to alumina ratio (SAR) ranging from 10 to 15 and a fraction of Al in the zeolite framework of 0.63 or greater is disclosed. A method of selective catalytic reduction of nitrogen oxides in exhaust gas that comprises contacting exhaust gases, typically in the presence of ammonia, urea, an ammonia generating compound, or a hydrocarbon compound, with an article comprising the disclosed microporous crystalline is also disclosed. Further, a method of making the disclosed microporous crystalline material is disclosed.

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Номер записи: 66
08-03-2018 дата публикации

Scr catalyst

Номер: US20180065087A1
Автор: Tomoyuki Mizuno
Принадлежит: Toyota Motor Corp

A highly practical SCR catalyst excellent in NO x purification performance is provided. The SCR catalyst includes a blend of an aluminosilicate molecular sieve that has supported thereon copper as an extra-framework metal and that has a CHA framework, and a silicoaluminophosphate molecular sieve that has a CHA framework, and is adapted to perform selective catalytic reduction of NO x . In the SCR catalyst, the silicoaluminophosphate molecular sieve and the aluminosilicate molecular sieve contain silicoaluminophosphate and aluminosilicate, respectively, in a molar ratio of silicoaluminophosphate:aluminosilicate of 0.1:1.0 to 0.4:1.0.

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Номер записи: 67
11-03-2021 дата публикации

PROCESS FOR REDUCING THE CONTENT OF NOx AND N2O FROM A TAIL GAS OF A NITRIC ACID PROCESS

Номер: US20210069643A1
Автор: Granger Jean Francois, Laurenzi Fabio, Ostuni Raffaele
Принадлежит:

Process for reducing the content of NOx and N2O from an input tail gas () of a nitric acid process, said input tail gas having a temperature lower than 400° C., the process comprising an abatement stage at least including a deN2O stage and deNOx stage and providing a conditioned tail gas () having a temperature greater than the input tail gas (), wherein, prior to submission to said abatement stage, said input tail gas () is pre-heated to a temperature of at least 400° C. by indirect heat exchange with at least a portion of said conditioned gas (). 115-. (canceled)16. A process for reducing the content of NOx and N2O from an input tail gas of a nitric acid process , said input tail gas having a temperature lower than 400° C. , the process comprising:an abatement stage including at least a stage of catalytic N2O decomposition (deN2O) over an iron-loaded zeolite catalyst and a stage of catalytic NOx reduction (deNOx), said abatement stage providing a conditioned tail gas having a temperature greater than the input tail gas, wherein:prior to submission to said abatement stage, said input tail gas is pre-heated to a temperature of at least 400° C. by indirect heat exchange with at least a portion of said conditioned gas;said deN2O and deNOx stages being carried out in separated catalytic beds and said deNOx stage being carried out over at least one of: a vanadium catalyst, a copper-loaded zeolite catalyst, or an iron-loaded zeolite catalyst.17. The process according to claim 16 , wherein said input tail gas has a temperature from 300° C. to 370° C.18. The process according to claim 16 , wherein said input tail gas has a temperature from 330° C. to 370° C.19. The process according to claim 16 , wherein said input tail gas is pre-heated to a temperature greater than 410° C.20. The process according to claim 16 , wherein said input tail gas is pre-heated to a temperature greater than 420° C.21. The process according to claim 16 , wherein:said nitric acid process includes ...

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Номер записи: 68
11-03-2021 дата публикации

METHODS TO PRODUCE ZEOLITES WITH THE GME TOPOLOGY AND COMPOSITIONS DERIVED THEREFROM

Номер: US20210069682A1
Автор: Davis Mark E., DUSSELIER MICHIEL J.
Принадлежит:

The present disclosure is directed to microporous crystalline aluminosilicate structures with GME topologies having pores containing organic structure directing agents (OSDAs) comprising at least one piperidinium cation, the compositions useful for making these structures, and methods of using these structures. In some embodiments, the crystalline zeolite structures have a molar ratio of Si:Al that is greater than 3.5. 2. The crystalline microporous aluminosilicate composition of claim 1 , having a molar ratio of Si:Al that is greater than 3.5 to about 100.3. The crystalline microporous aluminosilicate composition of claim 1 , that exhibits one or more of:{'figref': [{'@idref': 'DRAWINGS', 'FIG. 3'}, {'@idref': 'DRAWINGS', 'FIG. 6'}, {'@idref': 'DRAWINGS', 'FIG. 7'}, {'@idref': 'DRAWINGS', 'FIG. 13'}], '(a) an XRD diffraction pattern that is the same as or consistent with any one of those shown in , , , or ;'}{'sup': '29', '(b) an Si MAS spectrum having a plurality of chemical shifts of about −99.1, −104.9 and −110.5 ppm, downfield of a peak corresponding to an external standard of tetramethylsilane;'}{'sup': '29', 'figref': {'@idref': 'DRAWINGS', 'FIG. 13'}, '(c) an Si MAS spectrum that is the same as or consistent with the one shown in ;'}{'sup': '27', 'figref': {'@idref': 'DRAWINGS', 'FIG. 11'}, '(d) an Al MAS NMR spectrum that is the same as or consistent with the one shown in , or'}{'figref': {'@idref': 'DRAWINGS', 'FIG. 4'}, '(e) a thermogravimetric analysis curve that is the same as or consistent with the one shown in ; or'}{'sup': '13', 'figref': {'@idref': 'DRAWINGS', 'FIG. 5'}, '(f) a C CP MAS NMR spectrum that is the same as or consistent with the one shown in .'}6. The crystalline microporous aluminosilicate composition of claim 1 , wherein the at least one isomer of the quaternary piperidinium cation of Formula (I) comprises cis-N claim 1 ,N-dimethyl-3 claim 1 ,5-lupetidinium cation claim 1 , trans-N claim 1 ,N-dimethyl-3 claim 1 ,5-lupetidinium cation ...

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Номер записи: 69
12-03-2015 дата публикации

Catalyst and process for nitric oxide reduction in a waste gas

Номер: US20150071841A1
Автор: Brandmair Maria Theresia
Принадлежит:

In order to improve the lifetime of an SCR catalyst in the waste gas purification by means of the SCR process of waste gas of a biomass combustion plant, the catalyst comprises a sacrificial component selected from a zeolite and/or a clay mineral, in particular halloysite. During operation, catalyst poisons contained in the waste gas, in particular alkali metals, are absorbed by the sacrificial component so that catalytically active centres of the catalyst are not blocked by the catalyst poisons. 117-. (canceled)18. A catalyst for nitric oxide reduction in a waste gas from a combustion plant , the catalyst comprising a catalytically active component which comprises vanadium , and a sacrificial component selected from at least one molecular sieve and from a clay mineral , wherein the at least one molecular sieve is substantially free of alkali metals and transition metals , wherein the sacrificial component absorbs catalyst poison in the waste gas.19. The catalyst of claim 18 , wherein the catalytically active component and the sacrificial component are present in layers with the catalytically active component in or on a support substrate and the sacrificial component as an outer layer on the layer containing the catalytically active component or as a mixture with the catalytically active component and the sacrificial component in one layer.20. The catalyst of claim 18 , wherein the molecular sieve is substantially free of metals that are not part of the framework structure of the molecular sieve.21. The catalyst of claim 18 , wherein the molecular sieve is in the form of an H zeolite.22. The catalyst of claim 18 , wherein the molecular sieve is an aluminium silicate claim 18 , an iron silicate claim 18 , a SAPO (silicon-aluminium phosphate) or an AlPO (aluminium phosphate).23. The catalyst of claim 18 , wherein the molecular sieve is an aluminium silicate having a silicon-to-aluminium ratio of at least 30.24. The catalyst of claim 18 , wherein the molecular sieve is ...

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Номер записи: 70
24-03-2022 дата публикации

Nano-Structured Composite Materials for Chemical Air Pollutant and Odor Removal from Air

Номер: US20220088572A1
Автор: JIANG Mei, QI XIWANG
Принадлежит: Freshean Corp.

Described is related to nano-structured composite materials for removing harmful chemical air pollutants and odors from the air to prevent people from breathing in disease-causing chemicals and provide them with clean indoor air. The nano-structured composite materials comprise nano-catalysts embedded in the pores of nano-structured substrate materials selected from the group consisting of nano-porous carbon, nano-porous rare earth oxide, nano-porous zeolite, nano-porous alumina and nano-porous silica. The nano-scale synergy of nano-catalysts and nano-structured substrate materials provides effective air filtration materials for the complete trapping and elimination of the full spectrum of chemical air pollutants including both organic and inorganic compounds and odors for indoor spaces, which HEPA or activated carbon filters cannot achieve. 1. Nano-structured composite materials for removing chemical air pollutants and odors from air at room temperature comprise nano-catalysts supported on nano-structured substrate materials in the form of “Nano-in-Nano” configuration wherein nano-sized catalysts distributed and anchored inside the nano-pores of the substrate materials which include at least one of nano-porous carbon , nano-porous rare earth oxide , nano-porous zeolite , nano-porous alumina , nano-porous silica , or combinations thereof.2. The nano-structured composite materials according to claim 1 , wherein said chemical air pollutants include carbon monoxide claim 1 , nitric oxide claim 1 , nitrogen dioxide claim 1 , sulfur dioxide claim 1 , hydrogen sulfide claim 1 , ammonia claim 1 , chlorine claim 1 , ozone claim 1 , formaldehyde claim 1 , acetaldehyde claim 1 , butadiene claim 1 , propene claim 1 , butane claim 1 , acetone claim 1 , benzene claim 1 , phenol claim 1 , toluene claim 1 , xylene claim 1 , methylene chloride claim 1 , tetrachloroethylene claim 1 , mercaptans and polycyclic aromatic hydrocarbons.3. The nano-structured composite materials according ...

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Номер записи: 71
19-03-2015 дата публикации

TRANSITION METAL/ZEOLITE SCR CATALYSTS

Номер: US20150078968A1
Автор: Chen Hai-Ying
Принадлежит: JOHNSON MATTHEY PUBLIC LIMITED COMPANY

A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Ir and Pt. 1an SCR catalyst substrate containing a catalyst comprising Cu-SAPO-34; anda nitrogenous reductant injector positioned upstream of the SCR catalyst substrate,. An exhaust system for treatment of an exhaust gas stream comprising NOand particulate matter, comprising:wherein the catalyst is effective to promote the reaction of the reductant with nitrogen oxides to form nitrogen and HO selectively. This application is a continuation of U.S. application Ser. No. 13/567,692, filed on Aug. 6, 2012, which is a continuation of U.S. application Ser. No. 13/164,150, filed on Jun. 20, 2011, now U.S. Pat. No. 8,603,432, issued Dec. 10, 2013, which is a continuation of U.S. application Ser. No. 12/987,593, filed Jan. 10, 2011, which is a continuation of Ser. No. 12/597,707, filed on May 7, 2010, now abandoned, which is a 371 of PCT/GB2008/001451, filed on Apr. 24, 2008, which is turn claims priority to PCT/GB2007/050216, filed on Apr. 24, 2008, now Patent No. WO 2008/1324529, issued Nov. 6, 2008. Also, U.S. application Ser. No. 13/164,150 is a continuation of Ser. No. 12/597,707, filed on May 7, 2010, now abandoned, which is a 371 of PCT/GB2008/001451, filed on Apr. 24, 2008, which is turn claims priority to PCT/GB2007/050216, filed on Apr. 24, 2008, now Patent No. WO 2008/1324529, issued Nov. 6, 2008. The entire contents of each application in this paragraph are fully incorporated herein by reference.The present invention relates to a method of converting nitrogen oxides in a gas, such as an exhaust gas of a ...

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Номер записи: 72
14-03-2019 дата публикации

Clean Gas Stack

Номер: US20190076783A1
Автор: DAVIDSON James Gary, Hendrickson Dave
Принадлежит:

A flow-through solid catalyst formed by coating a zeolite material on a metal or ceramic solid substrate. In some embodiments, the solid substrate is formed as flat plates, corrugated plates, or honeycomb blocks. 1. An apparatus for drying and cleaning stack gases from a fossil fuel source , the apparatus comprising: [{'sup': '2', 'a zeolite material with a porosity of a total surface area of not greater than 1200 m/g and effective for achieving at least 70% reduction in carbon oxides, sulfur oxides, or nitrogen oxides from the stack gases;'}, 'a metal or ceramic solid substrate to which the zeolite material has been applied to create a zeolite-coated solid substrate; and', 'spacing between components of the substrate being selected based on a flow-through capacity of, a pressure drop across, and an effectiveness of removal of carbon oxides, sulfur oxides, or nitrogen oxides by the flow-through solid catalyst; and, 'a plurality of flow-through solid catalysts, each of the plurality of flow-through solid catalysts comprisinga pair of electrodes positioned inline in a gas flow upstream of the plurality of flow-through solid catalysts, the electrodes being insulated from containment of the gas flow, with a DC voltage applied between the electrodes to ionize water vapor in the gas flow without creating substantial amounts of hydrogen gas and to reduce moisture content of the gas flow through the flow-through solid catalysts.2. The apparatus of claim 1 , the DC voltage applied between the electrodes being less than 34 volts.3. The apparatus of claim 1 , the solid substrate comprising a material selected from a group consisting of stainless steel claim 1 , copper claim 1 , titanium claim 1 , a titanium alloy claim 1 , aluminum claim 1 , cordierite claim 1 , mullite claim 1 , and alumina.4. The apparatus of claim 1 , each of the plurality of flow-through solid catalysts further comprising a binder to increase adherence of the zeolite material to the substrate.5. The ...

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Номер записи: 73
22-03-2018 дата публикации

RHODIUM CATALYST FOR DECOMPOSING NITROUS OXIDE, THE PRODUCTION THEREOF, AND THE USE THEREOF

Номер: US20180078922A1
Автор: Bebensee Regine Helga, Deuerlein Stephan, Spiegel Andreas, Stella Denis, Würz Harald
Принадлежит:

The present invention relates to a catalyst for decomposition of nitrous oxide and also to its method of preparation and use. 110.-. (canceled)11. A nitrous oxide decomposition catalyst comprising rhodium on a catalyst carrier , wherein the catalyst carrier is obtained by mixing zirconium dioxide powder with a silicon compound as binder , optionally a porogen , optionally an acid , water and optionally also further additives to form a kneadable composition , homogenizing the composition , shaping the composition into shaped articles , drying and calcination , wherein the binder is selected from silicon compounds of general formulae (I) to (VI){'br': None, 'sub': x', '4-x, '(Hal)SiR\u2003\u2003(I)'}{'br': None, 'sub': x', '4-x, 'sup': '1', '(Hal)Si(OR)\u2003\u2003(II)'}{'br': None, 'sub': x', '4-x, 'sup': 1', '2, '(Hal)Si(NRR)\u2003\u2003(III)'}{'br': None, 'i': 'x', 'RxSi(OR1)4-\u2003\u2003(IV)'}{'br': None, 'sub': x', '4-x, 'sup': 1', '2, 'RSi(NRR)\u2003\u2003(V)'}{'br': None, 'sup': 1', '1', '2, 'sub': x', '4-x, '(RO)Si(NRR)\u2003\u2003(VI)'}whereHal in each occurrence is independently halogen,R in each occurrence is independently H or a substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, arylalkyl or aryl radical,{'sup': 1', '2, 'Rand Rin each occurrence are each independently H or a substituted or unsubstituted alkyl, acyl, arylalkyl or aryl radical, and'}x is from 0 to 4.12. The catalyst according to wherein the catalyst carrier is prepared by mixinga) 50 to 98 wt % of zirconium dioxide powder,b) 2 to 50 wt % of the silicon compound as binder,c) 0 to 48 wt % of porogen, andd) 0 to 48 wt % of further additives,wherein the sum total of components a) to d) adds up to 100 wt %, in the presence of water and optionally of an acid to form a kneadable composition.13. The catalyst according to wherein the zirconium dioxide powder consists essentially of monoclinic zirconium dioxide.14. The catalyst according to wherein zirconium dioxide ...

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Номер записи: 74
23-03-2017 дата публикации

CARBON DIOXIDE RECOVERY APPARATUS AND METHOD FOR TREATING EXHAUST GAS

Номер: US20170080411A1
Автор: FUJITA Koshito, HODOTSUKA Masatoshi, MURAOKA Daigo, SHIMURA Naohiko
Принадлежит:

A COrecovery apparatus according to the present invention comprises: an absorption tower comprising a COabsorption unit in which an exhaust gas containing COand a lean solution comprising an amino group-containing compound are brought into contact with each other to allow the lean solution to absorb CO; a regeneration tower in which COcontained in a rich solution is separated to regenerate the rich solution; and a purification unit in which an amino group-containing compound in a CO-removed exhaust gas obtained by removing COin the COabsorption unit is removed from, wherein the purification unit comprises a catalytic unit in which a photocatalyst is supported on a carrier including a gap through which air can pass, an activation member which activates the photocatalyst, and a power supply unit. The activation member is a pair of electrodes comprising a first electrode and a second electrode. 1. A carbon dioxide recovery apparatus comprising:{'sub': 2', '2', '2, 'an absorption tower comprising a COabsorption unit in which an exhaust gas containing COand an absorbing liquid comprising an amino group-containing compound are brought into gas-liquid contact with each other to allow the absorbing liquid to absorb the CO;'}{'sub': 2', '2, 'a regeneration tower in which the COcontained in the absorbing liquid which absorbed the COis separated to regenerate the absorbing liquid; and'}{'sub': 2', '2', '2, 'a purification unit in which an amino group-containing compound in a CO-removed exhaust gas obtained by removing the COin the COabsorption unit is removed from,'}wherein the purification unit comprises:a catalytic unit in which a photocatalyst is supported on a carrier comprising a gap through which air can pass; andan activation member which activates the photocatalyst.2. The carbon dioxide recovery apparatus according to claim 1 , wherein the activation member comprises either or both of an ultraviolet light lamp and a pair of electrode which comprises a first electrode ...

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Номер записи: 75
26-03-2015 дата публикации

SYSTEM AND METHOD FOR TREATING MERCURY IN FLUE GAS

Номер: US20150086457A1
Автор: Kagawa Seiji, Nagayasu Tatsuto, Okino Susumu, Sakurai Hideaki, Ukai Nobuyuki
Принадлежит: Mitsubishi Hitachi Power Systems, Ltd.

A system for treating mercury in flue gas is provided. The system includes a mercury adsorbent supply device to adsorb the mercury with the mercury adsorbent; a precipitator to collect the mercury adsorbent with adsorbed mercury and soot in the flue gas; a mercury adsorption assistant supply device to remove mercury remaining in the flue gas; and a desulfurization device to remove sulfur oxide (SOx) in the flue gas. 18-. (canceled)9. A system for treating mercury in flue gas , comprising:a boiler that discharges flue gas containing mercury;a reduction-oxidation assistant supplying unit that is provided downstream of the boiler to supply a reduction-oxidation assistant;a denitration device that is provided downstream of the reduction-oxidation assistant supplying to denitrate nitrogen oxide (NOx) in the flue gas;an air heater that is provided downstream of the denitration device to adjust a temperature of the flue gas;a heat exchanger that is provided downstream of the air heater to lower the temperature of the flue gas;a mercury adsorbent supply device that is provided downstream of the heat exchanger and supplies a mercury adsorbent into the flue gas so as to adsorb the mercury with the mercury adsorbent;a precipitator that is provided downstream of the heat exchanger to collect the mercury adsorbent with adsorbed mercury and soot in the flue gas;a mercury adsorption assistant supply device that is provided downstream of the precipitator and supplies a mercury adsorption assistant into the flue gas so as to remove mercury remaining in the flue gas; anda desulfurization device that is provided downstream of the mercury adsorption assistant supply device to remove sulfur oxide (SOx) in the flue gas.10. A method for treating mercury in flue gas comprising:discharging flue gas containing mercury;supplying a reduction-oxidation assistant;denitrating nitrogen oxide (NOx) in the flue gas;adjusting a temperature of the flue gas;lowering the temperature of the flue gas; ...

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Номер записи: 76
29-03-2018 дата публикации

FLUE GAS TREATMENT APPARATUS

Номер: US20180085694A1
Автор: Imada Noriyuki, Ishioka Masaaki, Sasaki Goki, UCHIYAMA Keigo, Yamada Akihiro, YANO Katsumi
Принадлежит: Mitsubishi Hitachi Power Systems, Ltd.

The disclosure relates to suppressing wear of a denitration catalyst due to ash particles having diameters greater than or equal to 100 μm. A flue gas treatment apparatus includes a denitration apparatus having a denitration catalyst, which reduces nitrogen oxides in flue gas exhausted from the coal combustion boiler, and a duct that guides the flue gas from the coal combustion boiler to the denitration apparatus, and the duct is formed of a horizontal duct connected to a flue gas outlet of the coal combustion boiler, a vertical duct connected to the horizontal duct, and a hopper provided below a portion where the horizontal duct and the vertical duct are connected to each other, wherein a collision plate, which causes ash particles in the flue gas to collide with the collision plate and fall into the hopper, is provided in an upper-end opening section of the hopper. 113-. (canceled)15. The flue gas treatment apparatus according to claim 14 , whereinthe collision plate is formed in a rectangular shape and disposed such that a lower long edge of the collision plate is located in the upper-end opening plane of the hopper corresponding to an extension plane of a bottom wall of the horizontal duct and the lower long edge extends in a width direction of the horizontal duct.16. The flue gas treatment apparatus according to claim 14 , whereinthe collision plate is provided in a range that is measured from a far-side end of the upper-end opening of the hopper viewed from a side facing the horizontal duct and corresponds to one-fourth to three-fourths of a length of the upper-end opening.17. The flue gas treatment apparatus according to claim 15 , whereinthe collision plate is provided in a range that is measured from a far-side and of the upper-end opening of the hopper viewed from a side facing the horizontal duct and corresponds to one-fourth to three-fourths of a length of the upper-end opening.18. The flue gas treatment apparatus according to claim 14 , whereina ...

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Номер записи: 77
30-03-2017 дата публикации

ZONED AMMONIA SLIP CATALYST FOR USE IN COMBUSTION TURBINES

Номер: US20170087541A1
Автор: ANDERSEN PAUL JOSEPH, Doura Kevin
Принадлежит:

A catalytic article for treating an exhaust gas stream containing one or more of NOx, hydrocarbons, CO, SOx and ammonia from a combustion turbine comprises (a) a substrate having an inlet end and an outlet end defining an axial length; (b) an oxidation layer comprising an oxidation catalyst comprising one or more noble metals, the oxidation layer being positioned on the substrate and covering the axial length of the substrate; and (c) an SCR layer comprising an SCR catalyst, the SCR layer being positioned on the oxidation layer and overlapping a portion of the oxidation layer, wherein the portion is less than 100%. 1. A catalytic article for treating an exhaust gas stream from a combustion turbine , comprising:(a) a substrate having an inlet end and an outlet end defining an axial length;(b) an oxidation layer comprising an oxidation catalyst comprising one or more noble metals, the oxidation layer being positioned on the substrate and covering the axial length of the substrate; and(c) an SCR layer comprising an SCR catalyst, the SCR layer being positioned on the oxidation layer and overlapping a portion of the oxidation layer, where the portion is less than 100%, where the article is configured for treating an exhaust gas stream containing one or more of NOx, hydrocarbons, CO, SOx and ammonia from a combustion turbine.2. The catalytic article of claim 1 , where the SCR layer comprises a first SCR catalyst and a second SCR catalyst where the first SCR catalyst is different than the second SCR catalyst and the first SCR catalyst is located on an inlet side of the article relative to the second SCR catalyst.3. The catalytic article of claim 2 , where the first SCR catalyst and the second SCR catalyst differ based on SCR catalyst loading.4. The catalytic article of claim 2 , where a loading of the second SCR catalyst is higher than in the first SCR catalyst.5. The catalytic article of claim 1 , where the oxidation layer comprises a first oxidation catalyst and a second ...

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Номер записи: 78
21-03-2019 дата публикации

METHODS AND SYSTEMS FOR PARTICULATE MATTER REMOVAL FROM A PROCESS EXHAUST GAS STREAM

Номер: US20190085168A1
Автор: BERGSTRÄSSER Ralf, Horn Daniel, LOUBIERE Donnie, Schmidt Kay, Taylor Rodney, Webb Russell
Принадлежит:

Disclosed herein are systems and methods for reducing the particulate matter content of an exhaust gas from a carbon black process. 1. A method of reducing particulate matter from an exhaust gas from a carbon black process , comprising:combusting the exhaust gas to thereby produce a combusted exhaust gas comprising particulate matter;catalytically oxidizing at least a portion of the particulate matter, thereby removing at least a portion of the particulate matter from the combusted exhaust gas using a guard bed comprising an oxidation catalyst.2. The method of claim 1 , wherein the combusted exhaust gas is not passed through an electrostatic precipitator.3. The method of claim 1 , wherein prior to combusting the exhaust gas claim 1 , the exhaust gas is filtered to remove at least a portion of the particulate matter.4. The method of claim 1 , wherein the exhaust gas is produced from thermal decomposition of a hydrocarbon or incomplete combustion of a hydrocarbon.5. The method of claim 4 , wherein the hydrocarbon comprises a heavy distillate oil claim 4 , a heavy residual oil claim 4 , a vacuum distillate oil claim 4 , a heavy vacuum oil claim 4 , a fluidized catalytic cracker distillate oil claim 4 , a fluidized catalytic cracker residual oil claim 4 , a distillate oil from coal gasification claim 4 , a residual oil from coal gasification claim 4 , a tar oil from coal gasification claim 4 , a distillate oil from coal distillation claim 4 , a residual oil from coal distillation claim 4 , a tar oil from coal distillation claim 4 , a distillate oil from steam cracking claim 4 , a residual oil from steam cracking claim 4 , a tar oil from steam cracking claim 4 , a distillate oil from polymer reaction distillation processes claim 4 , a residual oil from polymer reaction distillation processes claim 4 , a tar oil from polymer reaction distillation processes claim 4 , a distillate oil from a biological source claim 4 , a fuel oil from a biological source claim 4 , a ...

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Номер записи: 79
30-03-2017 дата публикации

Process and Apparatus for Reducing Acid Plume

Номер: US20170089572A1
Автор: Bohlen Scott K., Rivera Emelito P., Saratovsky Ian, Schulz Kent W., Smyrniotis Chrisopher R.
Принадлежит: FUEL TECH, INC.

The description relates to a process for reducing acid plume from stacks from coal-fired combustors operating at varying loads, which have typically been treated by back-end calcium carbonate (limestone) which has not been able to effectively control visible acid plume as power is ramped up from low load. According to the process, as high sulfur and high iron coals are burned in a combustor, magnesium hydroxide slurry is introduced into hot combustion gases in or near the combustion zone. And, during ramp up to high load from a period of operation at low load, additional magnesium hydroxide is introduced into an intermediate-temperature zone. 1. A process for reducing acid plume from stacks discharging the combustion gases produced by burning a coal having high sulfur and high iron contents , comprising:a. in a combustion zone, burning coal having from 1.0 to 8.0% sulfur and from 6.5 to 30.0% iron, producing combustion gases containing sulfur dioxide and sulfur trioxide;b. introducing a slurry of magnesium hydroxide into the combustion gases in or directly downstream of the combustion zone;c. responsive one or more control signals during an increase in the rate of burning coal from a low load to a higher load, introducing a slurry of magnesium hydroxide into the combustion gases in an intermediate-temperature zone; andd. following reaching steady state operation at the higher load, stopping introduction of the magnesium hydroxide into the intermediate-temperature zone.2. The process of claim 1 , further including:{'sub': 'x', 'passing the combustion gases through a highly oxidizing catalyst for the selective catalytic reduction of NOwith a nitrogenous treatment chemical while oxidizing molecular mercury in the gases.'}3. The process of claim 1 , wherein the magnesium hydroxide slurry is introduced into the intermediate-temperature zone which is a horizontal section of duct without heat exchanges oriented between an array of vertical heat exchange tubes and an array ...

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Номер записи: 80
05-04-2018 дата публикации

MOLECULAR SIEVE SSZ-107, ITS SYNTHESIS AND USE

Номер: US20180093896A1
Автор: Chen Cong-Yan, Xie Dan
Принадлежит:

This disclosure is directed to a novel crystalline molecular sieve designated as SSZ-107, its synthesis using 1,1-diethylpyrrolidinium cations as a structure directing agent, and its use as an adsorbent and/or a catalyst. 2. The molecular sieve of claim 1 , and having a composition comprising the molar relationship:{'br': None, 'sub': 2', '3', '2, 'i': 'n', 'AlO:()SiO'}wherein n has a value of from 5 to 25.6. A method of synthesizing the molecular sieve of claim 3 , the method comprising: (1) a source of silicon oxide;', '(2) a source of aluminum oxide;', '(3) a source of a Group 1 or Group 2 metal (M);', '(4) a structure directing agent (Q) comprising 1,1-diethylpyrrolidinium cations;', '(5) hydroxide ions; and', '(6) water; and, '(a) preparing a reaction mixture comprising(b) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the molecular sieve.9. The method of claim 6 , wherein the crystallization conditions include a temperature of from 100° C. to 200° C.10. An organic compound conversion process comprising contacting an organic compound under organic compound conversion conditions with a catalyst comprising the molecular sieve of .11. The organic compound conversion process of claim 10 , wherein the organic compound comprises an organic oxygenate compound and the organic compound conversion process converts the organic oxygenate compound to a product comprising olefins.12. The organic compound conversion process of claim 11 , wherein the organic oxygenate compound comprises methanol claim 11 , dimethyl ether claim 11 , or a combination thereof and the olefins comprise ethylene claim 11 , propylene claim 11 , or a combination thereof.13. A process of selectively reducing nitrogen oxides (NO) claim 1 , comprising contacting a gaseous stream containing nitrogen oxides with a catalyst comprising the molecular sieve of .14. The process of claim 13 , wherein the catalyst further comprises a transition metal selected from or ...

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Номер записи: 81
12-05-2022 дата публикации

High-efficient clean, high-variable load rate coal-fired power generation system and operation method thereof

Номер: US20220146096A1
Автор: Chaoyang Wang, Daotong Chong, Jiping Liu, Junjie Yan, Ming Liu, Qinan Xing
Принадлежит: Xian Jiaotong University

In a high-efficient clean, high-variable load rate coal-fired power generation system, through the internal thermal source SCR denitration catalytic module coupled with high temperature and low temperature storage tanks, the operating temperature of the internal thermal source SCR denitration catalytic module is controlled in a range of 300° C. to 400° C., ensuring that the SCR catalyst has high activity in full-working conditions. Moreover, the high temperature and low temperature storage tanks are coupled with the high-pressure heater group for steam turbine regenerative system, so that when the coal-fired unit needs to increase load rate, the thermal storage energy is quickly converted into output power. In addition, energy stored in the high temperature and low temperature storage tanks come from both the internal thermal source SCR denitration catalytic module and the thermal storage medium heater within the boiler, the operational flexibility and the boiler efficiency are improved.

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Номер записи: 82
26-03-2020 дата публикации

Cluster-supporting catalyst and method for producing it

Номер: US20200094228A1
Автор: Hisato YASUMATSU, Jun Hasegawa, Nobuyuki Fukui, Seitoku Ito, Toshiaki Tanaka
Принадлежит: Genesis Research Institute Inc, Toyota Motor Corp

There is provided a catalyst with low-temperature activity, high selectivity, high poisoning resistance and high durability, as well as a method for producing it. A cluster-supporting catalyst having a silicon carbide carrier and precious metal clusters supported on the silicon carbide carrier, and a method for producing the cluster-supporting catalyst that includes sputtering with a precious metal target to generate precious metal clusters, and impacting the generated precious metal clusters on the surface of the silicon carbide carrier to support them on it.

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Номер записи: 83
08-04-2021 дата публикации

METHOD AND SYSTEM FOR THE REMOVAL OF PARTICULATE MATTER AND NOXIOUS COMPOUNDS FROM FLUE-GAS USING A CERAMIC FILTER WITH AN SCR CATALYST

Номер: US20210101114A1
Автор: Gabrielsson Pär L. T.
Принадлежит: Haldor Topsoe A/S

Method and system for the removal of nitrogen oxides, from flue gas at low temperatures. 1. A method for the removal of nitrogen oxides from flue gas from combustion facilities , comprising the steps ofpassing the flue gas through one or more ceramic filter catalysed with a catalyst for selective reduction of nitrogen oxides in presence of ammonia added to the flue gas either as such or in form of a precursor thereof;at a temperature below 250° C. injecting an effluent gas containing nitrogen dioxide into the flue gas upstream the one or more ceramic filters;providing the effluent gas containing nitrogen dioxide by steps ofcatalytically oxidizing ammonia or a precursor thereof with an oxygen containing atmosphere to an effluent gas containing nitrogen monoxide and oxygen in presence of an oxidation catalyst;cooling the effluent gas to ambient temperature and oxidizing the nitrogen monoxide in the cooled effluent gas to the nitrogen dioxide containing effluent gas.2. The method of claim 1 , wherein the oxygen containing atmosphere comprises flue gas.3. The method of claim 1 , wherein the oxygen containing atmosphere is ambient air.4. The method according to claim 1 , wherein the nitrogen dioxide containing effluent gas is injected into the flue gas in an amount resulting in 45 to 55% by volume of the nitrogen oxides is nitrogen dioxide at inlet to the catalyst for selective reduction of nitrogen oxides.5. The method according to claim 1 , wherein the oxidation of the nitrogen monoxide in the cooled effluent gas to the nitrogen dioxide containing effluent gas is performed in presence of an oxidation catalyst.6. The method according to claim 1 ,wherein the one or more ceramic filters are in form of ceramic candle filters.7. System for use in the method according to claim 1 , comprising within a flue gas duct a filter house with one or more ceramic filters catalysed with a catalyst for selective reduction of nitrogen oxides;upstream the one or more ceramic filters or ...

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Номер записи: 84
13-04-2017 дата публикации

System and Method for Scrubbing Contaminated Gas with a Glycerol Solution

Номер: US20170100695A1
Автор: Deshmane Atul, Lekos Orion
Принадлежит: Whole Energy Fuels Corporation

Both a system and a method for scrubbing a contaminated gas stream with a glycerol solution are disclosed. The system includes a contaminated gas stream in need of purification, along with a column which receives the contaminated gas stream. A glycerol solution is also received by the column and is used to scrub the contaminated gas stream in the column. The glycerol solution is used to reduce at least three contaminants from the gas stream, and includes greater than 50% glycerol and less than 98% glycerol. In one embodiment, the glycerol solution includes between 0.5% to 10% salts, wherein the salts are sodium based, potassium based or a combination thereof. The salts act catalytically to convert glycerol and carbon dioxide to glycerol carbonate. 1. A method for using at least a portion of a contaminated gas stream , the method comprising:providing a column for receiving the contaminated gas stream;introducing biodiesel glycerol solution into the column to obtain a scrubbed gas stream, wherein the biodiesel glycerol solution is used to reduce at least three contaminants from the gas stream as the gas stream moves through the column and wherein the biodiesel glycerol solution contains greater than 50% glycerol and less than 98% glycerol; andadding the scrubbed gas stream to an anaerobic digester.2. A method of claim 1 , wherein the glycerol solution includes between 0.5% to 10% salts and wherein the salts are sodium based claim 1 , potassium based or a combination thereof.3. A method of claim 2 , wherein the glycerol solution includes between 1% to 3.5% salts.4. A method of claim 2 , wherein the salts act catalytically to convert glycerol and carbon dioxide to glycerol carbonate.5. A method of claim 4 , wherein the glycerol carbonate that is formed has an absorption capability similar to glycerol alone claim 4 , and by consuming carbon dioxide to form glycerol carbonate claim 4 , more carbon dioxide is able to be absorbed from the contaminated gas stream than pure ...

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Номер записи: 85
02-06-2022 дата публикации

NOX REDUCTION CATALYST

Номер: US20220168722A1
Автор: KAI KEIICHIRO, KANEDA Shimpei, Kiyosawa Masashi, Yokoyama Koichi
Принадлежит: MITSUBISHI POWER, LTD.

A method comprising treating combustion exhaust gas containing nitrogen oxides in the presence of a denitration catalyst to remove nitrogen oxides from the combustion exhaust gas, wherein the denitration catalyst is composed of a shaped product comprising a catalyst component, the shaped product has micro cracks in a mesh pattern or a bipectinate pattern on the surface of the shaped product, and the micro cracks have a 95% crack width of 100 μm or less and a crack area ratio variation coefficient of 0.7 or less. 1. A denitration catalyst , composed of a shaped product comprising a catalyst component , wherein the shaped product has micro cracks on the surface of the shaped product , and the micro cracks have a 95% crack width of 100 μm or less and a crack area ratio variation coefficient of 0.7 or less ,wherein the 95% crack width is a value when cumulative from the smallest to 95% in a span-based cumulative distribution of all measured crack widths,crack area ratio is a ratio of a total square measure of openings of cracks in one region of 1300 μm×990 μm randomly selected on the surface of the shaped product to a square measure of the region,average crack area ratio is a value obtained by dividing a total of the crack area ratios in every region of 1300 μm×990 μm randomly selected on the surface of the shaped product by the number of the regions,crack area ratio variation coefficient is a value obtained by dividing a positive square root of an arithmetic mean of squares of every difference between the average crack area ratio and the crack area ratio in the region of 1300 μm×990 μm randomly selected on the surface of the shaped product (that is, standard deviation of the crack area ratio) by the average crack area ratio.2. The denitration catalyst according to claim 1 , wherein the micro cracks have the average crack area ratio of 1 to 14%.3. The denitration catalyst according to claim 1 , wherein the micro cracks spread in a mesh pattern on the surface of the ...

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Номер записи: 86
21-04-2016 дата публикации

CATALYSTS FOR ENHANCED REDUCTION OF NOx GASES AND PROCESSES FOR MAKING AND USING SAME

Номер: US20160107119A1
Автор: Gao Feng, Kollar Marton, Peden Charles H. F., Szanyi Janos, Wang Yilin
Принадлежит: BATTELLE MEMORIAL INSTITUTE

Cu-exchanged zeolite catalysts with a chabazite structure containing selected concentrations of alkali ions or alkaline-earth ions and a lower concentration of (Cu) ions are described and a sequential process for making. Catalysts of the present invention reduce light-off temperatures providing enhanced low-temperature conversion of NOx gases. Catalysts of the present invention also exhibit high selectivity values compared to conventional NOx reduction catalysts. 1. A process for fabrication of a NOreduction catalyst , comprising the steps of:loading a synthetic chabazite zeolite with an alkali (Group-I) ion or an alkaline-earth (Group-II) ion to a concentration of between about 0.01% to at or below about 5% by weight therein; andsubsequently loading the synthetic zeolite with copper ions to a concentration of between about 0.01% to at or below about 2% by weight therein to form the NOx reduction catalyst with enhanced low-temperature and high-temperature activity.2. The process of claim 1 , wherein the loading steps are performed sequentially by ion-exchange with a first ion-exchange medium containing the selected alkali or alkaline-earth ions and a second ion-exchange medium containing the copper ions claim 1 , respectively.3. The process of claim 1 , wherein the loading steps include drying the zeolite and calcining the loaded zeolite at selected temperatures.4. A NOreduction catalyst produced by the process of claim 1 , wherein the atomic ratio of silicon (Si) to aluminum (Al) is selected between about 6 to about 40.5. The catalyst of claim 4 , wherein the catalyst provides a light-off temperature less than or equal to about 150° C.6. The catalyst of claim 4 , wherein the catalyst provides an atomic efficiency for reduction of NOx gases at a temperature at or below about 200° C. at least about 3 times greater than a conventional copper-exchanged chabazite catalyst containing greater than 2% (Cu) ions by weight.7. The catalyst of claim 4 , wherein the catalyst ...

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Номер записи: 87
23-04-2015 дата публикации

Process for the direct synthesis of cu-sapo-34

Номер: US20150110711A1
Автор: Arkady Kustov, Avelino Corma Canos, Joakim Reimer Thogersen, Manuel Moliner Marin, Raquel MARTINEZ FRANCO
Принадлежит: Haldor Topsoe AS

Process for the direct synthesis of Cu-SAPO-34 comprising at least the following steps: preparation of a mixture containing water, at least one silicon source, at least one Al source, at least one P source, at least one Cu source, at least one OSDA1 (where OSDA1 is any polyamine), and at least one OSDA2 (where OSDA2 is any organic molecule capable of directing the synthesis of the SAPO-34); and where the final synthesis mixture has the next molar composition: a Si:0.5 Al:b P:c Cu:d OSDA1:e OSDA2:f H20 wherein a is in the range from 0.01 to 0.3; wherein b is in the range from 0.2 to 0.49; wherein c is in the range from 0.001 to 0.6; wherein d is in the range from 0.001 to 0.6; wherein e is in the range from 0.001 to 2; wherein f is in the range from 1 to 200; hydrothermal treatment of the mixture at 80-200° C. until formation of the crystalline material, and recovery of the crystal-line material.

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Номер записи: 88
10-07-2014 дата публикации

LOW PHOSPHORUS CHABAZITES

Номер: US20140193327A1
Автор: Casci John L., Chen Hai-Ying, COLLIER JILLIAN ELAINE, FEDEYKO JOSEPH MICHAEL, RAJARAM RAJ RAO, Thompsett David
Принадлежит: JOHNSON MATTHEY PUBLIC LIMITED COMPANY

A catalyst composition is provided having a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiOand AlOin a mole ratio of about 5 to about 40. The catalyst composition is capable of NOx conversion at elevated temperatures. A catalytically active washcoat includes such catalyst compositions and one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article. Methods of reducing NOx employing the catalyst compositions are also provided. 1. A composition comprising a crystalline structure , wherein at least a portion of the crystalline structure is a molecular sieve having a chabazite framework consisting of thirty-six T-atoms selected from the group consisting of silicon , aluminum , and phosphorus;wherein said molecular sieve comprises about 0.05 to about 5.0 mole percent of framework phosphorus based on the total moles of framework silicon, aluminum, and phosphorus in said molecular sieve; andwherein said molecular sieve has a silica-to-alumina mole ratio of at least about 10.2. (canceled)3. The composition of wherein said molecular sieve comprises about 0.05 to about 1.0 mole percent of framework phosphorus based on the total moles of framework silicon claim 1 , aluminum claim 1 , and phosphorus in said molecular sieve.4. (canceled)5. (canceled)6. (canceled)7. The composition of wherein said molecular sieve comprises about 80 to about 90 mole percent of said framework Si and about 10 to about 20 combined mole percent of said framework Al and P claim 1 , based on the total moles of said framework Si claim 1 , Al claim 1 , and P in said molecular sieve.8. (canceled)9. The composition of wherein said framework phosphorus is present as —POmoieties claim 1 , said framework silicon in present as —SiOmoieties claim 1 , and framework aluminum is present as —AlOmoieties.10. (canceled)11. (canceled)12. The composition of wherein said molecular sieve material further comprises about 0.025 to about 5 ...

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Номер записи: 89
26-04-2018 дата публикации

INTEGRATED PURIFICATION METHOD AND SYSTEM FOR THE INDUSTRIAL EXHAUST GAS CONTAINING CYANIDES, HYDROCARBONS AND NOx

Номер: US20180111084A1
Автор: CHEN Biaohua, LI Yingxia, SHI Dongjun, Zhang Jie, ZHANG Runduo
Принадлежит:

An integrated purification method and an integrated purification system for an industrial exhaust gas containing cyanides, hydrocarbons and NO. The method comprises the steps of: 1) subjecting the exhaust gas containing pollutants such as cyanides, hydrocarbons and nitrogen oxides (NO) to a gas-liquid separation device () to separate the free fluid, then mixing with the air blown by the air blower (), and preheating by the heating unit; 2) the mixture entering into the selective catalytic combustion (SCC) reactor () for the selective catalytic combustion reaction to convert harmful substances into CO, HO and N, the catalysis being performed in two stages: the earlier stage is catalyzed by supported molecular sieve catalyst, and the latter stage is catalyzed by supported precious metal catalyst; and 3) the gas came out from the SCC reactor () entering into the heating unit to recover the heat, and then the purified exhaust gas being discharged directly through the chimney (). The system comprises a gas-liquid separation device (), a heating unit and a selective catalytic combustion reactor (), a gas outlet of the gas-liquid separation device () being connected to the selective catalytic combustion reactor () through the heating unit, and an exhaust gas outlet of the selective catalytic combustion reactor () being connected to a chimney () through the heating unit. 1. An integrated purification method for an industrial exhaust gas of cyanides , hydrocarbons and NO , wherein the industrial exhaust gas is an industrial exhaust gas containing multi-component pollutants , comprising:1) subjecting the exhaust gas containing pollutants such as cyanides, hydrocarbons and nitrogen oxides to a gas-liquid separation device to separate the free fluid, then mixing with the air blown by the air blower, and preheating by the heating unit;{'sub': 2', '2', '2, '2) entering into the selective catalytic combustion reactor for the selective catalytic combustion reaction, wherein the ...

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Номер записи: 90
09-06-2022 дата публикации

DENITRATION CATALYST, AND PRODUCTION METHOD THEREFOR

Номер: US20220176349A1
Автор: HARUTA Masatake, HATA Shinichi, INOMATA Yusuke, KIYONAGA Eiji, MORITA Keiichiro, Murayama Toru, Yoshida Kazuhiro
Принадлежит:

Provided is a catalyst with a more satisfactory denitration efficiency at low temperatures during a selective catalytic reduction reaction having ammonia as the reductant, compared to prior art techniques. 1. A denitration catalyst comprising vanadium oxide , having a carbon content of at least 0.05 wt % , and having a defect site at which an oxygen deficiency occurs in the crystal structure.2. The denitration catalyst according to claim 1 , wherein having a defect site at which an oxygen deficiency occurs indicates{'sup': −1', '−1, 'sub': 'B', 'a ratio (P1/P2) of a peak intensity P2 of wavelength 494 to 549 cmoriginating from edge-sharing 3V-Oc stretching vibration relative to a peak intensity P1 of wavelength 462 to 494 cmoriginating from crosslinked V—O—V bending vibration being 0.98 or less,'}in infrared transmission spectrum of the denitration catalyst.3. The denitration catalyst according to claim 1 , wherein the denitration catalyst is used in denitration at 270° C. or lower.4. The denitration catalyst according to claim 1 , wherein the denitration catalyst has an absorption edge wavelength of 575 nm or less.5. The denitration catalyst according to claim 1 , wherein the denitration catalyst has a BET specific surface area of 15.3 m/g or more.6. A production method for the denitration catalyst according to claim 1 , the method comprising a step of adding ethylene glycol to a precursor complex synthesized by mixing ammonium vanadate and oxalic acid claim 1 , and then firing.7. The production method according to claim 6 , wherein a molar ratio of the oxalic acid to the ammonium vanadate is at least 2. The present invention relates to a denitration catalyst and a production method thereof.In more detail, the present invention relates to a denitration catalyst used upon purifying exhaust gas produced by fuel combusting, and a production method thereof.As one of the pollutants emitted into air by the combustion of fuel, nitrogen oxides (NO, NO, NO, NO, NO, NO, NO) ...

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Номер записи: 91
28-04-2016 дата публикации

System and method for emissions control in gas turbine systems

Номер: US20160115839A1
Автор: Mustafa Tekin Dokucu, Rajeeva Kumar, Sidharth Abrol
Принадлежит: General Electric Co

A system includes an emissions control system. The emissions control system includes a processor programmed to receive one or more selective catalytic reduction (SCR) operating conditions for an SCR system. The SCR system is included in an aftertreatment system for an exhaust stream. The processor is also programmed to receive one or more gas turbine operating conditions for a gas turbine engine. The gas turbine engine is configured to direct the exhaust stream into the aftertreatment system. The processor is further programmed to derive a NH 3 flow to the SCR system based on an SCR model and the one or more SCR operating conditions, to derive a NO/NOx ratio, and to derive a fuel split for the gas turbine engine based on the NH 3 flow, the NO/NOx ratio, or a combination thereof.

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Номер записи: 92
27-04-2017 дата публикации

PROCESS FOR CATALYTIC DECOMPOSITION OF NITROGEN PROTOXIDE

Номер: US20170113208A1
Автор: CREMONA Alberto, VOGNA EDOARDO
Принадлежит:

A process for removing nitrogen protoxide from gas mixtures which 5 contain it, comprising contacting with a catalyst which contains mixed oxides of copper, manganese and rare earth metals in an amount expressed as percentage by weight of CuO, MnO and rare earth metal oxide in the lowest state of valency of 20-45% CuO, 50-60% MnO, and 5-20% rare earth metal oxide. 1. A process for removing nitrogen protoxide from gas emissions from adipic acid plants comprising contacting with a catalyst which comprises mixed oxides of copper , manganese and lanthanum having a composition expressed as percentage by weight of 55-60% MnO , 25-40% CuO , 9-14% LaO.2. The process according to claim 1 , wherein gas emissions released by the adipic acid plants are made to pass over a fixed catalyst bed at temperatures from 600° C. to 700° C.3. The process according to claim 2 , wherein the emissions released by the adipic acid plants are made to pass over a fixed catalyst bed kept at temperatures from 600 to 700° C.4. The process according to claim 1 , wherein the catalyst is supported on a porous metallic oxide.5. The process according to wherein the catalyst is supported on microspheroidal gamma alumina.6. The process according to claim 5 , wherein the catalyst is supported on granules which have the shape of perforated cylinders or with one or more lobes having through holes parallel to the axis of the granule.7. The process for preparing the catalyst according to - wherein the support is first impregnated with an aqueous solution of a salt of lanthanum or other rare earth metal claim 5 , dried and then calcined at a temperature from 450 to 600° C. and subsequently impregnated with a solution of a copper and manganese salt claim 5 , and then claim 5 , after drying claim 5 , calcined at temperatures from 300 to 500° C. This application is a continuation-in-part of and claims priority to U.S. application Ser. No. 12/523,883, filed Jul. 25, 2009, which is a 371 of PCT/IB2008/000149, dated ...

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Номер записи: 93
07-05-2015 дата публикации

Gas turbine power plant with flue gas recirculation and catalytic converter

Номер: US20150121892A1
Автор: Eribert Benz, Klaus Dobbeling, Michael Hoevel
Принадлежит: Alstom Technology AG

The invention pertains to a power plant including a gas turbine, a heat recovery boiler arrangement with at least a boiler inlet, and an outlet side with a first exit connected to a stack and a second exit connected to a flue gas recirculation, which connects the second exit to the compressor inlet of the gas turbine. The heat recovery boiler arrangement includes a first boiler flue gas path from the boiler inlet to the first boiler exit, and a separate second boiler flue gas path from the boiler inlet to the second boiler exit. Additionally, a supplementary firing and a subsequent catalytic NOx converter are arranged in the first boiler flue gas path. Besides the power plant a method to operate such a power plant is an object of the invention.

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Номер записи: 94
09-04-2020 дата публикации

SCR CATALYST

Номер: US20200108376A1
Автор: Chen Hai-Ying, FEDEYKO JOSEPH MICHAEL, RIVAS-CARDONA Alejandra
Принадлежит:

A copper-CHA zeolite catalyst for SCR of NOis disclosed. 1. A one-pot synthesis method for making a catalyst composition comprising a zeolite having a CHA framework , a molar silica-to-alumina ratio (SAR) of 45 to 85 , and an atomic copper-to-aluminium ratio of at least 1.25 , which method comprising forming a reaction mixture containing a source of silica , a source of alumina , a first CHA framework organic templating agent in the form of a copper metal-amine , a second distinct organic CHA templating agent , and seed crystals; heating the reaction mixture to facilitate crystallization and precipitation of the crystals of the catalyst composition; and collecting , washing and drying the crystals.2. The method of claim 1 , wherein the copper metal-amine is Cu-tetraethylenepentamine (Cu-TEPA) and the second distinct organic CHA templating agent is N claim 1 ,N claim 1 ,Ndimethylethylcyclohexylammonium (DMECHA).3. The method of claim 1 , wherein the reaction mixture is free from fluorine. This application is a continuation of U.S. parent application Ser. No. 14/559,099, filed Dec. 3, 2014, scheduled to issue on Dec. 24, 2019, and claims the priority benefit of U.S. Provisional Application No. 61/911,048, filed Dec. 3, 2013, both of which are incorporated herein by reference.The present invention relates to catalyst comprising a transition metal containing zeolite having a CHA framework.Zeolites are crystalline or quasi-crystalline aluminosilicates constructed of repeating SiOand AlOtetrahedral units. These units are linked together to form frameworks having regular intra-crystalline cavities and channels of molecular dimensions. Numerous types of synthetic zeolites have been synthesized and each has a unique framework based on the specific arrangement of its tetrahedral units. By convention, each framework type is assigned a unique three-letter code (e.g., “CHA”) by the International Zeolite Association (IZA).Synthetic CHA zeolites are produced using a structure ...

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Номер записи: 95
13-05-2021 дата публикации

NANO-FUNCTIONALIZED SUPPORT AND PRODUCTION METHOD THEREOF

Номер: US20210139341A1
Автор: BALDI Giovanni, BITOSSI Marco, CIONI Andrea, DAMI Valentina, NICCOLAI Laura
Принадлежит: COLOROBBIA CONSULTING S.r.l.

A nano-functionalized support comprises an application surface and a photocatalytic nanoparticle coating deposited on the application surface. The photocatalytic nanoparticle coating comprises titanium dioxide doped with a nitrogen-containing doping agent. 1. A nano-functionalized support comprising an application surface and a photocatalytic nanoparticle coating deposited on said application surface , wherein said application surface has a honeycomb structure and said photocatalytic nanoparticle coating comprises titanium dioxide doped with nitrogen deriving from a nitrogen-containing doping agent.2. (canceled)3. The support according to claim 1 , wherein the honeycomb structure defines a plurality of channels suitable for passage of a gaseous mixture.4. The support according to claim 1 , wherein said application surface having a honeycomb structure is characterized by a CSPI value of 40 to 120.5. The support according to claim 1 , wherein the application surface is made of a ceramic material.6. The support according to claim 5 , wherein the ceramic material is at least one selected from the group consisting of cordierite claim 5 , mullite and alumina.7. The support according to claim 1 , wherein the nitrogen-containing doping agent is one selected from the group consisting of amines claim 1 , amides claim 1 , organic ammonium salts and inorganic ammonium salts.8. A device for abating polluting agents in a gaseous mixture claim 1 , comprising at least one nano-functionalized support according to claim 1 , and a light source of visible light.9. A method for producing a nano-functionalized support and comprising the steps of:synthesizing an aqueous suspension of nanoparticles of titanium dioxide;adding a nitrogen-containing doping agent selected from the group consisting of diethanolamine, diammonium citrate, tetrabutylammonium hydroxide and triethanolamine to the suspension, realizing a suspension of nanoparticles and the nitrogen-containing doping agent;applying ...

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Номер записи: 96
17-07-2014 дата публикации

Templated catalyst composition and associated method

Номер: US20140199223A1
Автор: Dan Hancu, Larry Neil Lewis, Ming Yin, Oltea Puica Siclovan
Принадлежит: General Electric Co

A composition includes a templated metal oxide, at least 3 weight percent of silver, and at least one catalytic metal. A method of making and a method of using are included.

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Номер записи: 97
16-04-2020 дата публикации

Process and Apparatus for Reducing Nox Emissions

Номер: US20200116062A1
Автор: Jan H. DUYZER, Jan KOEVOET, Joost VAN WILLEGEN, Juliana Garcia MORETZ-SOHN MONTEIRO
Принадлежит: Koninklijke De Vries Scheepsbouw BV

The invention is directed to a process and apparatus for treating an off-gas from a lean burn engine comprising contacting said off-gas with an oxidizing compound, thus producing oxidized NOx compounds, followed by contacting the oxidized NOx compounds with water, by which at least part of said oxidized NOx compounds dissolves in said water. The process of the invention provides for a very efficient means of reducing NOx emission. The equipment for carrying out the process of the invention can be compact, so that it can be used on board without sacrificing too much valuable space and without increasing the weight of the ship too much.

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Номер записи: 98
27-05-2021 дата публикации

METHOD FOR REMOVING NITROGEN OXIDES FROM COMBUSTION FUMES WITH ON-SITE GENERATION OF AMMONIA

Номер: US20210156560A1
Автор: Ostuni Raffaele, Zardi Federico
Принадлежит: Casale SA

A method for the control of nitrogen oxides content in the combustion fumes of a thermal power plant is disclosed; the method comprises the on-site production of ammonia by the steps of: electrolysis of water as a source of hydrogen; separation of air as a source of nitrogen, formation of a make-up gas and synthesis of ammonia in a suitable synthesis loop; said on-site produced ammonia, or a solution thereof, is used for a process of reduction of nitrogen oxides in the combustion fumes. 1. A method for the control of nitrogen oxides content in the combustion fumes (G) of a power plant for the production of electric energy where said combustion takes place , the method comprising the steps of:producing ammonia in the site of said installation, with a process including: producing a hydrogen current by means of electrolysis of water; producing a nitrogen current by means of separation of nitrogen from air; forming an ammonia make up gas containing hydrogen and nitrogen from said hydrogen current and nitrogen current respectively, and reacting said make up gas at a suitable ammonia synthesis pressure; andreducing nitrogen oxides contained in said combustion fumes using said produced ammonia;wherein the production rate of ammonia is regulated according to the cost and/or availability of electric energy, and/or according to the load of said power plant and/or according to the demand of electric energy, such that the production of ammonia is increased during electricity off-peak hours when the demand for electricity is low, and is reduced or stopped, thus maximizing the net output of said plant, during electricity peak hours when the demand for electric energy is higher.2. The method according to claim 1 , said process of reducing nitrogen oxides being a process of selective catalytic reduction or selective non-catalytic reduction.3. The method according to claim 1 , said installation being any of: a thermal power plant for production of electricity claim 1 , a waste ...

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Номер записи: 99
10-05-2018 дата публикации

Cyclonic Injector And Method For Reagent Gasification And Decomposition In A Hot Gas Stream

Номер: US20180126332A1
Автор: Eric Lindemann, James M. Valentine, Jeffrey Michael Broderick, Saiprasad Jangiti, Thomas V. Eldredge
Принадлежит: Peerless Manufacturing Co

A system for vaporizing and optionally decomposing a reagent, such as aqueous ammonia or urea, which is useful for NOx reduction, includes a cyclonic decomposition duct, wherein the duct at its inlet end is connected to an air inlet port and a reagent injection lance. The air inlet port is in a tangential orientation to the central axis of the duct. The system further includes a metering valve for controlling the reagent injection rate. A method for vaporizing and optionally decomposing a reagent includes providing a cyclonic decomposition duct which is connected to an air inlet port and an injection lance, introducing hot gas through the air inlet port in a tangential orientation to the central axis of the duct, injecting the reagent axially through the injection lance into the duct; and adjusting the reagent injection rate through a metering valve.

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Номер записи: 100