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RU2017108240A - Зонированный катализатор для обработки отработавшего газа - Google Patents

Зонированный катализатор для обработки отработавшего газа Download PDF

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RU2017108240A
RU2017108240A RU2017108240A RU2017108240A RU2017108240A RU 2017108240 A RU2017108240 A RU 2017108240A RU 2017108240 A RU2017108240 A RU 2017108240A RU 2017108240 A RU2017108240 A RU 2017108240A RU 2017108240 A RU2017108240 A RU 2017108240A
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Russia
Prior art keywords
zone
scr catalyst
catalyst
scr
exhaust gas
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RU2017108240A
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English (en)
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RU2017108240A3 (ru
RU2698817C2 (ru
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Тим ГЕНШОВ
Эндрю НЬЮМЕН
Гудмунд СМЕДЛЕР
Оливье ЗОННТАГ
Изабель ТИНГЭЙ
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Джонсон Мэтти Паблик Лимитед Компани
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Publication of RU2017108240A3 publication Critical patent/RU2017108240A3/ru
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
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    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
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    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst
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    • B01D53/9472—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts with catalysts positioned on one brick in different zones
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    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/103—Oxidation catalysts for HC and CO only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Claims (18)

1. Система для обработки отработавшего газа, содержащая:
a. первую зону катализатора СКВ, содержащую ванадий, нанесенный на оксид металла, выбранный из TiO2, ZrO2, SiO2, CeO2 и Al2O3; и
b. вторую зону катализатора СКВ, содержащую нагруженное медью мелкопористое молекулярное сито,
причем первая зона катализатора СКВ расположена выше по потоку от второй зоны катализатора СКВ относительно нормального потока отработавшего газа через систему.
2. Система по п. 1, в которой первая зона катализатора СКВ имеет более высокое удельное содержание пористого покрытия относительно второй зоны катализатора СКВ, а суммарное удельное содержание меди выше суммарного удельного содержания ванадия.
3. Система по любому предшествующему пункту, в которой первая зона катализатора СКВ содержит примерно 0,5-4 массовых процента ванадия (в расчете на суммарную массу оксида металла), а вторая зона катализатора СКВ содержит примерно 1-4 массовых процента меди (в расчете на суммарную массу молекулярного сита).
4. Система по любому предшествующему пункту, в которой вторая зона катализатора СКВ не содержит иных переходных металлов, кроме меди.
5. Система по любому предшествующему пункту, в которой первая зона катализатора СКВ содержит ванадат железа.
6. Система по любому предшествующему пункту, причем система не содержит каких-либо катализаторов очистки отработавшего газа, размещенных между первой и второй зонами катализатора СКВ.
7. Система по любому предшествующему пункту, в которой первая и вторая зоны катализатора СКВ нанесены на проточную сотовую подложку, имеющую впускной конец, выпускной конец и измеренную от впускного конца до выпускного конца осевую длину, при этом первая и вторая зоны катализатора СКВ смежны друг другу или по меньшей мере частично перекрываются.
8. Система по любому предшествующему пункту, дополнительно содержащая зону катализатора окисления ниже по потоку от второй зоны катализатора СКВ.
9. Система по п. 8, в которой вторая зона катализатора СКВ полностью перекрывает зону катализатора окисления.
10. Система по любому предшествующему пункту, в котором первая зона катализатора СКВ представляет собой экструдированную сотовую структуру с ванадиевым катализатором, имеющую осевую длину, а вторая зона СКВ представляет собой пористое покрытие, которое покрывает примерно от 10 до 90 процентов этой осевой длины.
11. Система по любому из пп. 1-9, в которой первая зона катализатора СКВ находится на фильтре с проточными стенками, имеющем впускную сторону и выпускную сторону, а вторая зона катализатора СКВ находится на проточной сотовой подложке, при условии, что отсутствует какой-либо промежуточный катализатор между первой зоной катализатора СКВ и второй зоной катализатора СКВ.
12. Система по п. 11, дополнительно содержащая термически регенерируемый поглотитель NOx, расположенный выше по потоку от первой зоны катализатора СКВ.
13. Система по п. 11 или 12, дополнительно содержащая нанесенный на проточную подложку катализатор окисления проскочившего аммиака ниже по потоку от второй зоны катализатора СКВ.
14. Система по п. 12 или 13 при зависимости от п. 12, дополнительно содержащая коллектор двигателя или турбонагнетатель и трубопровод для направления отработавшего газа от коллектора двигателя или турбонагнетателя к термически регенерируемому поглотителю NOx, при условии, что система не содержит какого-либо катализатора очистки отработавшего газа между коллектором двигателя или турбонагнетателем и термически регенерируемым поглотителем NOx.
15. Способ обработки отработавшего газа, включающий стадию последовательного контактирования смеси аммиака и отработавшего газа, вырабатываемого двигателем внутреннего сгорания, с (a) первой зоной СКВ, содержащей ванадий, нанесенный на оксид металла, выбранный из TiO2, ZrO2, SiO2, CeO2 и Al2O3, и (b) второй зоной СКВ, содержащей нагруженное медью мелкопористое молекулярное сито.
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CN105188925A (zh) * 2013-03-14 2015-12-23 巴斯夫公司 选择性催化还原催化剂系统

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RU2017108240A3 (ru) 2019-01-22
KR20170041900A (ko) 2017-04-17
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DE102015113415A1 (de) 2016-02-18
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RU2698817C2 (ru) 2019-08-30
EP3180106A1 (en) 2017-06-21
CN106714939A (zh) 2017-05-24
GB2533452A (en) 2016-06-22
US20160045868A1 (en) 2016-02-18
WO2016024126A1 (en) 2016-02-18
BR112017002843A2 (pt) 2018-01-30
US9579603B2 (en) 2017-02-28
CN106714939B (zh) 2019-12-03
JP2017525554A (ja) 2017-09-07
BR112017002843B1 (pt) 2022-01-04
JP7229956B2 (ja) 2023-02-28
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