RU2018131407A - Шабазитный катализатор, совместно обмененный на медь и железо - Google Patents

Шабазитный катализатор, совместно обмененный на медь и железо Download PDF

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RU2018131407A
RU2018131407A RU2018131407A RU2018131407A RU2018131407A RU 2018131407 A RU2018131407 A RU 2018131407A RU 2018131407 A RU2018131407 A RU 2018131407A RU 2018131407 A RU2018131407 A RU 2018131407A RU 2018131407 A RU2018131407 A RU 2018131407A
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zeolite
iron
catalyst
copper
cha
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RU2018131407A
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Иван ПЕТРОВИЧ
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Басф Корпорейшн
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Claims (36)

1. Композиция катализатора, содержащая:
цеолит, имеющий кристаллическую структуру шабазита (СНА), ионообмененный на железо и медь.
2. Композиция катализатора по п. 1, где указанный цеолит имеет размер пор от около 3 до около 5 Ангстрем.
3. Композиция катализатора по п. 1, где кристаллическая структура СНА выбрана из алюмосиликатного цеолита, боросиликата, галлосиликата, SAPO, и ALPO, MeAPSO и МеАРО.
4. Композиция катализатора по п. 3, где кристаллическая структура СНА представляет собой алюмосиликатный цеолит, имеющий соотношение диоксида кремния и оксида алюминия (SAR) от около 5 до около 100.
5. Композиция катализатора по п. 4, где указанный алюмосиликатный цеолит имеет соотношение диоксида кремния и оксида алюминия (SAR) от около 10 до около 40.
6. Композиция катализатора по п. 1, где железо присутствует в указанном цеолите в количестве от около 0,01% до около 6,0 мас. % от конечного ионообмененного на металл цеолита, вычисленное как оксид железа (Fe2O3).
7. Композиция катализатора по п. 1, где железо присутствует в указанном цеолите в количестве от около 0,5% до около 4,5 мас. % от конечного ионообмененного на металл цеолита, вычисленное как оксид железа (Fе2О3).
8. Композиция катализатора по п. 1, где медь присутствует в указанном цеолите в количестве от около 0,01% до около 6,0 мас. % от конечного ионообмененного на металл цеолита, вычисленная как оксид меди (СuО).
9. Композиция катализатора по п. 1, где медь присутствует в указанном цеолите в количестве от около 0,5% до около 5 мас. % от конечного ионообмененного на металл цеолита, вычисленная как оксид меди (СuО).
10. Композиция катализатора по п. 1, где цеолит имеет площадь поверхности по БЭТ по меньшей мере около 400 м2/г.
11. Композиция катализатора по п. 1, имеющая размер частиц D90 от около 10 до около 40 микрон.
12. Способ получения цеолитного катализатора СНА, содержащего железо и медь в нем, включающий:
a. приведение в контакт шабазитного цеолита (СНА) с предшественником металла меди и предшественником металла железа в растворе с образованием цеолитного материала СНА, содержащего железо и медь в нем;
b. сушку указанного твердого материала с получением цеолитного катализатора СНА, содержащего предшественник металла железа и меди в нем; и
c. кальцинирование цеолитного катализатора СНА, содержащего катализатор, содержащий предшественник металла железа и меди, с превращением катализатора в активную форму.
13. Способ по п. 12, где предшественник металла меди представляет собой соль ацетата меди или нитрата меди.
14. Способ по п. 12, где предшественник металла железа представляет собой соль нитрат железа (III) или ацетат железа (II).
15. Способ по п. 12, где шабазитный цеолит (СНА) представляет собой Na форму шабазитного цеолита и был кальцинирован перед приведением в контакт с предшественником металла меди и предшественником металла железа.
16. Способ по п. 12, дополнительно включающий нагревание предшественника металла меди и предшественника металла железа в растворе с СНА цеолитом при повышенной температуре.
17. Способ по п. 12, где СНА цеолитный катализатор, содержащий катализатор, содержащий предшественник металла железа и меди, кальцинируют при температуре от около 500°С до около 800°С.
18. Способ по п. 12, где раствор представляет собой водный раствор.
19. Каталитическое изделие, содержащее подложку катализатора, имеющую множество каналов, пригодных для потока газа, причем каждый канал имеет поверхность стенки в сцеплении с каталитическим покрытием, содержащим композицию катализатора по любому из п.п. 1-11.
20. Каталитическое изделие по п. 19, где подложка катализатора представляет собой сотообразную подложку в форме подложки фильтра с проточными стенками или проточную подложку.
21. Каталитическое изделие по п. 19, где каталитическое покрытие присутствует на подложке при загрузке по меньшей мере около 1,0 г/дюйм3.
22. Способ уменьшения уровня NOx в выхлопном газе, включающий приведение в контакт газа с катализатором в течение периода времени и при температуре, достаточных для уменьшения уровня NOx в газе, где катализатор представляет собой композицию катализатора по любому из п.п. 1-11.
23. Способ по п. 22, где указанный уровень NOx в выхлопном газе восстанавливают до N2 при температуре от 200°С до около 600°С.
24. Способ по п. 22, где указанный уровень NOx в выхлопном газе уменьшают на по меньшей мере 50% при 200°С.
25. Способ по п. 22, где указанный уровень NOx в выхлопном газе уменьшают на по меньшей мере 70% при 600°С.
26. Система для обработки выбросов для обработки потока выхлопного газа, причем система для обработки выбросов включает:
i) двигатель, производящий поток выхлопного газа;
ii) каталитическое изделие по п. 19, расположенное ниже по ходу потока от двигателя в сообщении по текучей среде с потоком выхлопного газа, и выполненное с возможностью восстановления NOx внутри выхлопного потока с образованием обработанного потока выхлопного газа; и
iii) инжектор, выполненный с возможностью добавления восстанавливающего агента в поток выхлопного газа, чтобы промотировать восстановление NOx до N2 и воды, в то время как поток выхлопного газа подвергают воздействию каталитическим изделием.
27. Система для обработки выбросов по п. 26, где двигатель представляет собой дизельный двигатель.
28. Система для обработки выбросов по п. 26, дополнительно содержащая дизельный катализатор окисления.
29. Система для обработки выбросов по п. 26, где восстанавливающий агент содержит аммиак или предшественник аммиака.
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