RU2014147605A - Способ и система очистки выхлопного газа двигателя внутреннего сгорания - Google Patents

Способ и система очистки выхлопного газа двигателя внутреннего сгорания Download PDF

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RU2014147605A
RU2014147605A RU2014147605A RU2014147605A RU2014147605A RU 2014147605 A RU2014147605 A RU 2014147605A RU 2014147605 A RU2014147605 A RU 2014147605A RU 2014147605 A RU2014147605 A RU 2014147605A RU 2014147605 A RU2014147605 A RU 2014147605A
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exhaust gas
catalyst
filter
zeolite
zeotype
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RU2014147605A
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RU2623356C2 (ru
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Мануэль Молинер МАРИН
Кристина Франч МАРТИ
Антонио Эдуардо Паломарес ГИМЕНО
Авелино Корма Канос
Петер Н.Р. ВЕННЕСТРЕМ
Аркадий КУСТОВ
Йоаким Раймер ТЕГЕРСЕН
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Хальдор Топсеэ А/С
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    • 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
    • F01N3/18—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 characterised by methods of operation; Control
    • F01N3/20—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 characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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    • B01J29/82—Phosphates
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    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
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    • F01N3/18—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 characterised by methods of operation; Control
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Abstract

1. Способ очистки выхлопного газа двигателя внутреннего сгорания, включающийуменьшение содержания сажи в выхлопном газе путем пропускания газа через фильтр;последующее восстановление оксидов азота в присутствии аммиака или его предшественника при взаимодействии с катализатором, активным в NH-СКВ;периодическую регенерацию фильтра путем выжигания сажи, накопившейся в фильтре, и тем самым повышения температуры выхлопного газа вплоть до 850°C и содержания паров воды вплоть до 100 об. %; ипропускание выхлопного газа, выходящего из фильтра, через катализатор во время регенерации фильтра, в котором катализатор содержит гидротермически стабильный микропористый цеолит и/или цеотип, обладающий каркасом типа ΑΕΙ и активированный медью.2. Способ по п. 1, в котором атомное отношение медь:алюминий равно от около 0,01 до около 1 для цеолита и атомное отношение медь:кремний равно от 0,01 до около 1 для цеотипа.3. Способ по п. 1, в котором атомное отношение кремний:алюминий равно от 5 до 50 для цеолита и от 0,02 до 0,5 для цеотипа.4. Способ по п. 1, в котором 80% начальной способности восстанавливать оксиды азота при температуре, равной 250°C, после воздействия на катализатор температуры, равной 750°C, и содержания паров воды, равного 100%, в выхлопном газе в течение 13 часов.5. Способ по п. 1, в котором по меньшей мере от 80 до 90% исходной микропористости сохраняется после старения при 600°C, и по меньшей мере от 30 до 40% сохраняется после старения при 750°C.6. Способ по любому из пп. 1-5, в котором катализатором является алюмосиликатный цеолит SSZ-39 и/или силикоалюминий фосфат SAPO-18.7. Система очистки выхлопного газа, включающая активный регенерируемый сажевый фильтр и катализатор СКВ, содержащий гидротермически стабильный микропористый цеолит и/и

Claims (14)

1. Способ очистки выхлопного газа двигателя внутреннего сгорания, включающий
уменьшение содержания сажи в выхлопном газе путем пропускания газа через фильтр;
последующее восстановление оксидов азота в присутствии аммиака или его предшественника при взаимодействии с катализатором, активным в NH3-СКВ;
периодическую регенерацию фильтра путем выжигания сажи, накопившейся в фильтре, и тем самым повышения температуры выхлопного газа вплоть до 850°C и содержания паров воды вплоть до 100 об. %; и
пропускание выхлопного газа, выходящего из фильтра, через катализатор во время регенерации фильтра, в котором катализатор содержит гидротермически стабильный микропористый цеолит и/или цеотип, обладающий каркасом типа ΑΕΙ и активированный медью.
2. Способ по п. 1, в котором атомное отношение медь:алюминий равно от около 0,01 до около 1 для цеолита и атомное отношение медь:кремний равно от 0,01 до около 1 для цеотипа.
3. Способ по п. 1, в котором атомное отношение кремний:алюминий равно от 5 до 50 для цеолита и от 0,02 до 0,5 для цеотипа.
4. Способ по п. 1, в котором 80% начальной способности восстанавливать оксиды азота при температуре, равной 250°C, после воздействия на катализатор температуры, равной 750°C, и содержания паров воды, равного 100%, в выхлопном газе в течение 13 часов.
5. Способ по п. 1, в котором по меньшей мере от 80 до 90% исходной микропористости сохраняется после старения при 600°C, и по меньшей мере от 30 до 40% сохраняется после старения при 750°C.
6. Способ по любому из пп. 1-5, в котором катализатором является алюмосиликатный цеолит SSZ-39 и/или силикоалюминий фосфат SAPO-18.
7. Система очистки выхлопного газа, включающая активный регенерируемый сажевый фильтр и катализатор СКВ, содержащий гидротермически стабильный микропористый цеолит и/или цеотип, обладающий каркасом типа ΑΕΙ и активированный медью.
8. Система очистки выхлопного газа по п. 7, в которой катализатор СКВ объединен с сажевым фильтром.
9. Система очистки выхлопного газа по п. 7, в которой атомное отношение медь:алюминий равно от около 0,01 до около 1 для цеолита, и атомное отношение медь:кремний равно от 0,01 до около 1 для цеотипа.
10. Система очистки выхлопного газа по п. 7, в которой атомное отношение кремний:алюминий в катализаторе СКВ равно от 5 до 50 для цеолита и от 0,02 до 0,5 для цеотипа.
11. Система очистки выхлопного газа по п. 7, в которой катализатор СКВ сохраняет 80% начальной способности восстанавливать оксиды азота при температуре, равной 250°C, после воздействия на катализатор температуры, равной 750°C, и содержания паров воды, равного 100%, в выхлопном газе в течение 13 часов.
12. Система очистки выхлопного газа по п. 7, в которой катализатор СКВ сохраняет по меньшей мере от 80 до 90% исходной микропористости после старения при 600°C и по меньшей мере от 30 до 40% исходной микропористости после старения при 750°C.
13. Система очистки выхлопного газа по п. 7, в которой катализатором является алюмосиликатный цеолит SSZ-39 и/или силикоалюминий фосфат SAPO-18.
14. Система очистки выхлопного газа по любому из пп. 7-13, в которой катализатор СКВ осажден на монолитную структуру подложки.
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