KR102264058B1 - 배기 가스 처리를 위한 촉매 - Google Patents
배기 가스 처리를 위한 촉매 Download PDFInfo
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Abstract
Description
도 2a 및 2b는 구리 로딩된 AEI 알루미노실리케이트와 구리 로딩된 CHA 알루미노실리케이트의 중간 및 고온 열수 노화 후 NOx 전환 성능을 도시한다.
도 3은 구리 로딩된 AEI 알루미노실리케이트의 고온 열수 노화 후 NH3 전환 성능을 도시한다.
도 4a, 4b, 및 4c는 구리 로딩된 AEI, CHA, 및 BEA 알루미노실리케이트의 희박/부화 노화 후 NOx 및 NH3 성능을 도시한다.
가스 성분 | 부화(R) | 희박(L) |
NO C3H6(C1로서) H2 CO O2 H2O CO2 |
200 ppm 5000 ppm 1.30% 4.00% 1.00% 5% 5% |
200 ppm 0 0 0 10% 5% 5% |
Claims (18)
- a. AEI 구조, 20 내지 30의 실리카-대-알루미나 몰 비율(SAR) 및 0.1 내지 15μm의 평균 결정 크기를 갖고 할로겐이 없는 알루미노실리케이트 분자체, 분자체 물질의 총 중량을 기준으로 1 내지 5 중량 퍼센트의 촉진제 금속 및 알루미나, 실리카, 비-제올라이트 실리카 알루미나, 티타니아, 지르코니아 및 세리아로부터 선택되는 성분을 포함하는 바인더를 포함하는 촉매 조성물; 및
b. 미립자 필터의 위에 및/또는 내부에 상기 촉매 조성물이 배치되는 미립자 필터
를 포함하는, 배기 가스 처리용 촉매 물품. - 제1항에 있어서, 상기 바인더는 알루미나를 포함하는 촉매 물품.
- 제2항에 있어서, 상기 금속은 구리 및 철로부터 선택되는 촉매 물품.
- 제2항에 있어서, 상기 알루미나는 감마 알루미나 및/또는 세타 알루미나인 촉매 물품.
- 제2항에 있어서, 상기 바인더는 알루미나로 이루어지는 촉매 물품.
- 제2항에 있어서, 상기 필터는 월-플로 필터인 촉매 물품.
- 제6항에 있어서, 상기 촉매 조성물은 상기 필터 위의 또는 내부의 코팅인 촉매 물품.
- 제7항에 있어서, 상기 코팅은 상기 필터 위의 표면 코팅, 상기 필터의 상기 표면을 침투하는 코팅, 또는 이들의 조합을 포함하는 촉매 물품.
- 제8항에 있어서, 상기 코팅은 상기 필터 위의 표면 코팅을 포함하는 촉매 물품.
- 제9항에 있어서, 상기 코팅은 상기 필터의 입구측 위에 있는 촉매 물품.
- 제10항에 있어서, 상기 필터는 상기 필터의 출구측 위에 배치되는 암모니아 산화 촉매를 더 포함하는 촉매 물품.
- 제2항에 있어서, 상기 필터는 40 내지 70%의 기공도를 갖는 촉매 물품.
- 제2항에 있어서, 상기 필터는 적어도 70%의 효율을 갖는 촉매 물품.
- 제2항에 있어서, 상기 필터는 적어도 30%의 기공 상호연결 부피를 갖는 촉매 물품.
- 제2항에 있어서, 상기 필터는 10 내지 40μm의 평균 기공 크기를 갖는 촉매 물품.
- 제2항에 있어서, 상기 촉매 조성물은 워시코트이고, 상기 워시코트는 1.5 내지 2.5 g/in3의 로딩으로 상기 필터 위에 존재하는 촉매 물품.
- 제1항에 있어서, 상기 AEI 구조를 갖는 분자체는 0.1 내지 10μm의 평균 결정 크기를 갖는 촉매 물품.
- 제17항에 있어서, 상기 평균 결정 크기는 0.5 내지 5μm인 촉매 물품.
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