KR102524761B1 - 촉매 물품 - Google Patents
촉매 물품 Download PDFInfo
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- KR102524761B1 KR102524761B1 KR1020197026066A KR20197026066A KR102524761B1 KR 102524761 B1 KR102524761 B1 KR 102524761B1 KR 1020197026066 A KR1020197026066 A KR 1020197026066A KR 20197026066 A KR20197026066 A KR 20197026066A KR 102524761 B1 KR102524761 B1 KR 102524761B1
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- molecular sieve
- substrate
- ceria
- catalytic
- catalyst
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- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/74—Noble metals
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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
- F01N3/101—Three-way catalysts
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- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
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- F01N3/24—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 constructional aspects of converting apparatus
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
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Abstract
Description
도 1a는 본 발명에 따른 촉매 물품을 포함할 수 있는 허니컴형 기재의 사시도이고,
도 1b는 도 1a에 대한 확대된 부분 단면도로서, 도 1a의 기재의 단부 면에 평행한 평면을 따라 취해진 것이며, 도 1a에 도시된 복수의 가스 유동 통로의 확대도를 도시하는 모노리쓰 관통-유동 기재를 나타내고,
도 1c는 벽-유동 필터 기재의 사시도를 도시하고, 도 1d는 벽-유동 필터 기재의 섹션의 단면도를 도시하며,
도 2a 및 2b는 2 가지의 가능한 코팅 구성을 도시하고,
도 3 내지 8은 실시예 1의 분말 샘플의 CO 라이트-오프 성능을 보여주는 것으로 (새로운, 노화된, 황 노출된 및 탈황된 촉매 분말에 대한 데이터를 제공함),
도 3은 노화, 황 노출 및 탈황 후 세리아 분말 상의 2% Pd (샘플 2)의 CO 라이트-오프 성능을 나타내고;
도 4는 650℃에서 탈황 후 Pd/세리아 분말 샘플 2 대 Pd/Ce/CHA 분말 샘플 3의 성능 비교를 도시하고;
도 5는 650℃에서 탈황 후 Pd/세리아 분말 샘플 2 대 Pd/CHA의 성능 비교를 도시하고;
도 6은 650℃에서 탈황 후 Pd/세리아 분말 샘플 2 대 Pd/Ce/ZSM-5 분말 샘플 4의 성능 비교를 도시하고;
도 7은 650℃에서 탈황 후 Pd/세리아 분말 샘플 2 대 Pd/Ce/베타 분말 샘플 5의 성능 비교를 도시하고;
도 8은 650℃에서 탈황 후 Pd/(10%)Ce/베타 분말 샘플 5 대 Pd/(20%)Ce/베타 분말 샘플 6의 성능 비교를 도시하고;
도 9는 650℃에서 탈황 후 Pd/Ce/CHA 분말 샘플 3 대 Pd/Ce/CuCHA 분말 샘플 7의 성능 비교를 도시하고;
도 10은 비히클과 시뮬레이터 사이의 엔진 출구 온도 추적 결과 비교도이고;
도 11은 비히클과 시뮬레이터 사이의 엔진 출구 CO 배출 비교도이다.
Claims (34)
- 내연 기관의 배기 가스 스트림을 처리하기 위한, 기재 상에 배치된 촉매 코팅을 포함하는 촉매 물품으로서,
상기 촉매 코팅은 기재 상의 하부 코팅 층 및 상기 하부 코팅 층 상의 상부 코팅 층을 포함하고;
상기 하부 코팅 층은, 최대 8 개의 사면체 원자로 정의된 채널을 포함하는 소-기공(small pore) 분자체인, 세리아-함유 소-기공 분자체를 포함하고, 상기 상부 코팅 층은 내화성 금속 산화물 지지체 상의 백금족 금속을 포함하거나, 또는
상기 하부 코팅 층은 내화성 금속 산화물 지지체 상의 백금족 금속을 포함하고, 상기 상부 코팅층은, 최대 8 개의 사면체 원자로 정의된 채널을 포함하는 세리아-함유 소-기공 분자체를 포함하며;
상기 세리아-함유 소-기공 분자체 중의 세리아가 세리아-함유 소-기공 분자체의 총 중량을 기준으로 1 중량% 내지 50 중량%로 존재하는, 촉매 물품. - 삭제
- 제 1 항에 있어서,
상기 세리아-함유 분자체가, ACO, AEI, AEN, AFN, AFT, AFX, ANA, APC, APD, ATT, CDO, CHA, DDR, DFT, EAB, EDI, EPI, ERI, GIS, GOO, IHW, ITE, ITW, LEV, KFI, MER, MON, NSI, OWE, PAU, PHI, RHO, RTH, SAT, SAV, SIV, THO, TSC, UEI, UFI, VNI, YUG, ZON 및 이들의 혼합물 또는 상호성장물(intergrowth)로 이루어진 군으로부터 선택된 골격 유형을 가진 소-기공 분자체를 포함하는, 촉매 물품. - 제 1 항에 있어서,
상기 세리아-함유 분자체가, CHA, LEV, AEI, AFX, ERI, SFW, KFI, DDR, ITE 및 이들의 혼합물 또는 상호성장물로 이루어진 군으로부터 선택된 골격 유형을 가진 분자체를 포함하는, 촉매 물품. - 제 1 항에 있어서,
상기 분자체가 CeCHA인, 촉매 물품. - 삭제
- 삭제
- 제 1 항에 있어서,
상기 세리아-함유 분자체가 ZSM-5 분자체를 포함하는, 촉매 물품. - 삭제
- 제 1 항에 있어서,
상기 세리아-함유 분자체가 기재의 총 부피를 기준으로 0.05 g/in³내지 5.0 g/in³의 담지량으로 존재하는, 촉매 물품. - 제 1 항에 있어서,
상기 하부 층이 탄화수소 흡착 분자체를 추가로 포함하는, 촉매 물품. - 제 1 항에 있어서,
상기 세리아-함유 분자체가, 구리, 철, 망간, 마그네슘, 코발트, 니켈, 백금, 팔라듐 및 로듐으로 이루어진 군으로부터 선택된 하나 이상의 촉매 활성 금속을 추가로 포함하는, 촉매 물품. - 제 12 항에 있어서,
상기 하나 이상의 촉매 활성 금속은 기재의 총 부피를 기준으로 3 g/ft³내지 100 g/ft³의 담지량으로 존재하는, 촉매 물품. - 제 1 항에 있어서,
내화성 금속 산화물 지지체는 알루미나, 티타니아, 지르코니아; 티타니아, 지르코니아 및 세리아 중 하나 이상과 알루미나의 혼합물; 알루미나 상에 코팅된 세리아; 알루미나 상에 코팅된 티타니아; 실리카-알루미나; 알루미노실리케이트; 알루미나-지르코니아; 알루미나-크로미아; 또는 알루미나-세리아를 포함하는, 촉매 물품. - 제 1 항에 있어서,
백금족 금속이 기재의 총 부피를 기준으로 2 g/ft³내지 200 g/ft³의 담지량으로 존재하는, 촉매 물품. - 제 1 항에 있어서,
기재가 다공성 벽-유동(wall-flow) 필터인, 촉매 물품. - 제 1 항에 있어서,
기재가 관통-유동(flow-through) 모노리쓰인, 촉매 물품. - 제 1 항에 있어서,
하부 코팅 층이 기재와 직접 접촉되는, 촉매 물품. - 제 1 항에 있어서,
상부 코팅 층이 하부 코팅 층과 직접 접촉되는, 촉매 물품. - 제 1 항에 있어서,
촉매 코팅이 언더코트 층을 포함하는, 촉매 물품. - 제 1 항에 있어서,
촉매 코팅이 오버코트 층을 포함하는, 촉매 물품. - 제 1 항에 있어서,
촉매 코팅이 상부 코팅층과 하부 코팅층 사이에 중간층을 포함하는, 촉매 물품. - 제 1 항에 있어서,
촉매 코팅이 언더코트 층, 오버코트 층 또는 중간층을 포함하고, 이때 상기 층들 중 하나 이상에 백금족 금속 성분이 없는, 촉매 물품. - 제 1 항에 있어서,
촉매 코팅이 기재의 총 부피를 기준으로 0.3 g/in³내지 7 g/in³의 담지량으로 존재하는, 촉매 물품. - 제 1 항에 있어서,
상부 코팅 층이 전체 하부 코팅 층과 중첩되는, 촉매 물품. - 제 1 항에 있어서,
하부 코팅층이 기재의 전체 축 방향 길이로 연장되는, 촉매 물품. - 제 1 항에 있어서,
상부 코팅 층이 기재의 전체 축 방향 길이로 연장되는, 촉매 물품. - 제 1 항에 있어서,
하부 코팅 층이 입구 또는 출구 단부로부터 기재의 축 방향 길이의 10% 내지 95%로 연장되는, 촉매 물품. - 제 1 항에 있어서,
상부 코팅 층이 입구 또는 출구 단부로부터 기재의 축 방향 길이의 10% 내지 95%로 연장되는, 촉매 물품. - 내연 기관의 하류에서 그와 유체 연통되어 위치된, 제 1 항, 제 3항 내지 제 5 항, 제 8 항 및 제 10 항 내지 제 29 항 중 어느 한 항의 촉매 물품을 포함하는 배기 가스 처리 시스템.
- 제 30 항에 있어서,
우레아 주입기, 선택적 접촉 환원 촉매, 디젤 산화 촉매, 매연 필터, 암모니아 산화 촉매 및 희박(lean) NOx 트랩으로 이루어진 군으로부터 선택된 촉매 물품을 추가로 포함하는, 배기 가스 처리 시스템. - 탄화수소 및/또는 일산화탄소 및/또는 NOx를 포함하는 배기 가스 스트림의 처리 방법으로서,
배기 스트림을 제 1 항, 제 3 항 내지 제 5 항, 제 8 항 및 제 10 항 내지 제29 항 중 어느 한 항의 촉매 물품에 통과시키는 것을 포함하는, 처리 방법. - 탄화수소 및/또는 일산화탄소 및/또는 NOx를 포함하는 배기 가스 스트림의 처리 방법으로서,
배기 스트림을 제 30 항의 배기 가스 처리 시스템에 통과시키는 것을 포함하는, 처리 방법. - 제 33 항에 있어서,
상기 시스템이 우레아 주입기, 선택적 접촉 환원 촉매, 디젤 산화 촉매, 매연 필터, 암모니아 산화 촉매 및 희박 NOx 트랩으로 이루어진 군으로부터 선택된 촉매 물품을 추가로 포함하는, 처리 방법.
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