RU2015125904A - Катализатор окисления аммиака - Google Patents

Катализатор окисления аммиака Download PDF

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RU2015125904A
RU2015125904A RU2015125904A RU2015125904A RU2015125904A RU 2015125904 A RU2015125904 A RU 2015125904A RU 2015125904 A RU2015125904 A RU 2015125904A RU 2015125904 A RU2015125904 A RU 2015125904A RU 2015125904 A RU2015125904 A RU 2015125904A
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layer
catalytic
carrier
product according
vanadium
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RU2015125904A
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Пол Джозеф АНДЕРСОН
Кевин ДОУРА
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Джонсон Мэтти Паблик Лимитед Компани
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Claims (32)

1. Каталитическое изделие для очистки выхлопного газа, который содержит:
а. каталитический слой благородного металла, содержащий один или более благородных металлов, расположенный на первом носителе из тугоплавкого оксида металла; и
b. каталитический слой ванадия, предварительно фиксиро-ванный на втором носителе из тугоплавкого оксида металла, выбранного из диоксида алюминия, диоксида титана, диоксида циркония, диоксида церия, диоксида кремния и их смесей,
в котором каталитический слой благородного металла находится в физическом контакте с каталитическим слоем ванадия.
2. Каталитическое изделие по п. 1, в котором указанный каталитический слой благородного металла представляет собой покрытие, нанесенное на носитель, выбранный из группы, состоящей из сотовых проточных монолитов, сотовых монолитов с проточными стенками и гофрированных металлических пластин, и в котором указанный ванадиевый каталитический слой представляет собой покрытие, нанесенное на указанный инертный носитель.
3. Каталитическое изделие по п. 2, в котором указанный каталитический слой благородного металла является первым слоем, а указанный каталитический слой ванадия является вторым слоем.
4. Каталитическое изделие по п. 3, в котором указанный первый слой по существу свободен от ванадия, и указанный второй слой по существу свободен от благородных металлов.
5. Каталитическое изделие по п. 4, в котором изделие является прокаленным.
6. Каталитическое изделие по п. 4, в котором указанный второй слой содержит диоксид ванадия, предварительно фиксированный на носителе из диоксида титана, в котором указанный диоксид ванадия присутствует в количестве примерно 0,1-10% мас. по отношению к массе диоксида титана.
7. Каталитическое изделие по п. 6, в котором указанный второй слой дополнительно содержит оксид вольфрама.
8. Каталитическое изделие по п. 6, в котором указанный первый слой содержит один или более металлов платиновой группы,
выбранных из платины и палладия, на носителе из диоксида алюминия, в котором указанный металл платиновой группы присутствует в количестве примерно 0,05-0,50% мас. по отношению к массе носителя из диоксида алюминия.
9. Каталитическое изделие по п. 3, в котором указанный второй слой наносится поверх, по меньшей мере, части указанного первого слоя.
10. Каталитическое изделие по п. 3, в котором указанный инертным носителем является проточный сотовый брусок.
11. Каталитическое изделие по п. 10, дополнительно содержащий катализатор селективного каталитического восстановления ((СКВ)(SCR)), расположенный на или в указанном проточном бруске выше по потоку от указанных первого и второго слоев.
12. Каталитическое изделие по п. 3, в котором указанным инертным носителем является гофрированная металлическая пластина.
13. Каталитическое изделие по п. 3, в котором указанным инертным носителем является сотовый фильтр с проточными стенками.
14. Каталитическое изделие по п. 1, в котором указанным вторым каталитическим слоем является экструдированный носитель, и указанным первым каталитическим слоем является покрытие на указанном экструдированном носителе.
15. Способ получения каталитического изделия, включающего:
а. введение ванадия на носитель из тугоплавкого оксида металла;
b. после стадии (а) прокаливание носителя из тугоплавкого оксида металла с содержанием ванадия с формованием предварительно фиксированного катализатора;
с. покрытие инертного носителя нанесенным катализатором благородного металла с формованием первого слоя; и
d. покрытие указанного инертного носителя указанным предварительно фиксированным катализатором с формованием второго слоя.
16. Способ по п. 15, в котором указанный инертный носитель,
содержащий указанный первый слой и указанный второй слой, прокаливается при температуре примерно 400-600°С в течение примерно 1-10 ч.
17. Способ по п. 16, в котором указанный первый слой по существу свободен от ванадия, и указанный второй слой по существу свободен от благородных металлов.
18. Способ по п. 15, в котором указанный первый слой содержит диоксид ванадия на носителе из диоксида титана, и указанный второй слой содержит, по меньшей мере, один благородный металл, выбранный из платины и палладия, нанесенный на носитель из диоксида алюминия.
19. Способ очистки выхлопного газа, включающий:
а. контактирование выхлопного газа, полученного от сгорания углеводородов в стехиометрическом избытке кислорода, где выхлопной газ содержит аммиак, с каталитическим изделием по п. 1, и
b. окисление, по меньшей мере, части указанного аммиака с образованием N2 и/или NOx.
20. Способ по п. 15, который дополнительно содержит выше по потоку способ селективного каталитического восстановления NOx.
21. Система очистки выхлопного газа, которая содержит СКВ-катализатор и катализатор аммиачного клина по п. 1.
RU2015125904A 2012-11-30 2013-11-27 Катализатор окисления аммиака RU2015125904A (ru)

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DE112013005743T5 (de) 2015-09-10
US9227176B2 (en) 2016-01-05
BR112015011998A2 (pt) 2017-07-11
CN104812486A (zh) 2015-07-29
EP2925441A2 (en) 2015-10-07
US20140154163A1 (en) 2014-06-05
WO2014083431A2 (en) 2014-06-05
KR20150091343A (ko) 2015-08-10
CN104812486B (zh) 2019-02-12
JP6411358B2 (ja) 2018-10-24

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