KR20170120698A - 고온 및 저온 성능이 향상된 희박 NOx 트랩 - Google Patents
고온 및 저온 성능이 향상된 희박 NOx 트랩 Download PDFInfo
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Abstract
Description
| 샘플 번호 | 촉매 | PGM 로딩/g/ft3(Pt/Pd/Rh) | 저온 저장 물질 | 고온 저장 물질 |
| 1.1 | LNT A | 150(130/15/5) | 세리아 | 13% Ce/알루미나 상의 20% Ba |
| 1.2 | LNT B | 150(130/15/5) | 세리아 상의 5% Ba | 50% 세리아/50% 알루미나 상의 17% Ba |
| 기판 4.5*5.4" 300/600 금속 기판 | ||||
| NEDC 엔진 배기 가스 및 세 번째 시험 사이클의 전환률; 촉매 시스템 상류의 배기 가스: NOx=0.16g/km; CO=1.5g/km; HC=0.210g/km) | |||
| 샘플 | NOx 전환률(%) | CO 전환률(%) | HC 전환률(%) |
| 1.1 LNT A | 40 | 77 | 71 |
| 1.2 LNT B | 54 | 87 | 78 |
| 샘플 번호 | 촉매 | PGM 로딩/g/ft3 (Pt/Pd/Rh) |
저온 저장 물질 | 고온 저장 물질 | 저온/고온 물질 비 |
| 1.3 | LNT C | 85(72/8/5) | 세리아 | 13% Ce/알루미나 상의 20% Ba | 0.76 |
| 1.4 | LNT D | 85(72/8/5) | 세리아 상의 Ba | 50% 세리아/50% 알루미나 상의 Ba | 0.62 |
| 1.5 | LNT E | 85(72/8/5) | 세리아 | 50% 세리아/50% 알루미나 상의 Ba | 0.62 |
| 1.6 | LNT F | 85(72/8/5) | 세리아 상의 Ba | 50% 세리아/50% 알루미나 상의 Ba | 0.36 |
| 1.7 | LNT G | 85(72/8/5) | 세리아 상의 Ba | 50% 세리아/50% 알루미나 상의 Ba | 1.00 |
| 세라믹 기판 5.66*4.5" 400/4 | |||||
| 두 번째 WLTC의 오븐 노화된 LNT 후의 하류 배기 가스(촉매 상류의 배기 가스: NOx=0.36g/km; CO=1.65g/km; HC=0.215g/km) | |||
| 샘플 | NOx 전환률(%) | CO 전환률(%) | HC 전환률(%) |
| 1.3 LNT C | 58.1 | 96.2 | 78.1 |
| 1.4 LNT D | 81.9 | 98.4 | 83.7 |
| 1.5 LNT E | 73.1 | 98.7 | 83.7 |
| 1.6 LNT F | 81.4 | 98.4 | 81.9 |
| 1.7 LNT G | 70.0 | 98.5 | 83.3 |
| Ba/세리아 LNT에 대한 비교 | |||
| 샘플 번호 | 촉매 | PGM 로딩/g/ft3 (Pt/Pd/Rh) |
저온 저장 물질 | 고온 저장 물질 |
| 1.8 | LNT H | 120(103/12/5) | ------ | 세리아 상의 Ba |
| 1.9 | LNT I | 120(103/12/5) | 세리아 상의 Ba | 50% 세리아/50% 알루미나 상의 Ba |
| 기판 5.66*4.5" 400/4 | ||||
| 두 번째 WLTC의 오븐 노화된 LNT 후의 하류 배기 가스(촉매 상류의 배기 가스: NOx=0.34g/km; CO=1.68g/km; HC=0.232g/km) | |||
| 샘플 | NOx 전환률(%) | CO 전환률(%) | HC 전환률(%) |
| 1.8 LNT H | 75.5 | 98.5 | 81 |
| 1.9 LNT I | 82.5 | 98.5 | 82 |
Claims (49)
- 50중량% 초과의 환원성 금속 산화물을 포함하는 제 1 지지 물질;
내화성 금속 산화물 및 50중량% 이하의 환원성 금속 산화물을 포함하는 제 2 지지 물질 상에 지지된 알칼리토금속 10 내지 30중량%; 및
상기 제 1 지지 물질과 상기 제 2 지지 물질중 적어도 하나에 지지된 백금족 금속 성분
을 포함하는, 담체 기판 상 워시코트 층을 포함하는 희박(lean) NOx 트랩 조성물. - 제 1 항에 있어서,
상기 제 1 지지 물질의 일부 상에 알칼리토금속 0.5 내지 10중량%가 지지된, 희박 NOx 트랩 조성물. - 제 2 항에 있어서,
상기 제 1 지지 물질의 일부 상에 알칼리토금속 3 내지 6중량%가 지지된, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 환원성 금속 산화물이 CeO2, MnO2, Mn2O3, Fe2O3, CuO 또는 CoO중 하나 이상 또는 이들의 혼합물인, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 제 1 지지 물질이 알루미나를 추가로 포함하는, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 제 1 지지 물질이 Y, Nd, Sm, La, Zr, Nb 또는 Pr의 산화물로부터 선택되는 하나 이상의 도판트를 추가로 포함하는, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 알칼리토금속이 산화바륨인, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 제 1 지지 물질이 세리아 100중량%를 포함하는, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 제 2 지지 물질이 본질적으로 세리아와 알루미나로 구성되는, 희박 NOx 트랩 조성물. - 제 9 항에 있어서,
상기 제 2 지지 물질이 세리아 20 내지 50중량% 및 알루미나 50 내지 80중량%를 포함하는, 희박 NOx 트랩 조성물. - 제 9 항에 있어서,
상기 세리아 및 알루미나가 30:70의 세리아 대 알루미나 비로 존재하는, 희박 NOx 트랩 조성물. - 제 9 항에 있어서,
상기 세리아 및 알루미나가 50:50의 세리아 대 알루미나 비로 존재하는, 희박 NOx 트랩 조성물. - 제 7 항에 있어서,
상기 제 1 지지체 상에 1 내지 7중량%의 산화바륨이 지지된, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 백금족 금속 성분이 Rh, Pt 및 Pd중 하나 이상을 포함하는, 희박 NOx 트랩 조성물. - 제 14 항에 있어서,
내화성 금속 산화물 및 50중량% 이하의 환원성 금속 산화물을 포함하는 제 3 지지 물질을 추가로 포함하는 희박 NOx 트랩 조성물. - 제 15 항에 있어서,
상기 내화성 금속 산화물이 알루미나인, 희박 NOx 트랩 조성물. - 제 14 항에 있어서,
상기 백금족 금속 성분이 Pt 및 Pd를 포함하는, 희박 NOx 트랩 조성물. - 제 17 항에 있어서,
상기 Pt가 20 내지 200g/ft3 범위로 존재하고, 상기 Pd가 1 내지 50g/ft3 범위로 존재하며, 상기 Pt 대 Pd의 비가 15:1 내지 2:1 범위인, 희박 NOx 트랩 조성물. - 제 18 항에 있어서,
상기 Pt 대 Pd의 비가 10:1 내지 4:1 범위인, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 백금족 금속 성분 100%가 제 2 지지체 상에 존재하고, 상기 백금족 금속 성분이 Pt 및 Pd를 포함하는, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 백금족 금속 성분이 Pt 및 Pd를 포함하고, 50 내지 100중량%의 Pd가 제 1 지지체 상에 존재하는, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 백금족 금속 성분이 Pt 및 Pd를 포함하고, 2 내지 10중량%의 Pt가 제 1 지지체 상에 존재하는, 희박 NOx 트랩 조성물. - 제 17 항에 있어서,
상기 백금족 금속 성분이, 제 1 지지체의 일부 상에 1 내지 20g/ft3 범위로 존재하는 로듐을 추가로 포함하는, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 제 2 지지체 및 제 1 지지체가 1:3 내지 4:1의 제 2 지지체 대 제 1 지지체의 비로 존재하는, 희박 NOx 트랩 조성물. - 제 24 항에 있어서,
상기 제 2 지지체 및 제 1 지지체가 1:2 내지 3:1의 제 2 지지체 대 제 1 지지체의 비로 존재하는, 희박 NOx 트랩 조성물. - 제 1 항에 있어서,
상기 제 2 지지체의 내화성 금속 산화물이 Mg, Mn 및 Zr의 산화물중 하나 이상으로 도핑된, 희박 NOx 트랩 조성물. - 제 26 항에 있어서,
상기 내화성 금속 산화물이 Mg 및 Zr의 산화물로 도핑된, 희박 NOx 트랩 조성물. - 제 7 항에 있어서,
상기 산화바륨 및 제 2 지지체의 로딩이 1 내지 4g/in3 범위로 존재하는, 희박 NOx 트랩 조성물. - 제 13 항에 있어서,
상기 산화바륨 및 제 1 지지체의 로딩이 0.1 내지 2g/in3 범위로 존재하는, 희박 NOx 트랩 조성물. - 제 1 항에 따른 희박 NOx 트랩 조성물을 포함하는 희박 연소(lean burn) 내연 엔진용 배기 가스 시스템으로서, 이 시스템이 하류(downstream)의 선택적인 촉매적 환원(SCR) 촉매를 추가로 포함하는, 시스템.
- 제 30 항에 있어서,
상기 희박 NOx 트랩 조성물이 기판 상에 워시코트로서 배치되고, 상기 SCR 촉매가 별도의 하류의 기판 상에 별도의 워시코트 층으로서 배치된, 배기 가스 시스템. - 제 31 항에 있어서,
상기 희박 NOx 트랩 조성물이 벌집형 관통 유동(honeycomb flow through) 기판 상에 있고, SCR 촉매가 벽 유동(wall flow) 기판 상에 있는, 배기 가스 시스템. - 제 31 항에 있어서,
상기 희박 NOx 트랩 조성물이 벽 유동 기판 상에 있고, SCR 촉매가 벌집형 관통 유동 기판 상에 있는, 배기 가스 시스템. - 50중량% 초과의 환원성 금속 산화물을 포함하는 제 1 지지 물질;
내화성 금속 산화물 및 50중량% 이하의 환원성 금속 산화물을 포함하는 제 2 지지 물질 상에 지지된 알칼리토금속 10 내지 20중량%;
50중량% 초과의 환원성 금속 산화물을 포함하는 제 3 지지 물질 상에 지지된 백금족 금속 성분; 및
내화성 금속 산화물 및 50중량% 이하의 환원성 금속 산화물을 포함하는 제 4 지지 물질 상에 지지된 백금족 금속 성분
을 포함하는, 담체 기판 상 워시코트 층을 포함하는 희박 NOx 트랩 조성물. - 제 34 항에 있어서,
상기 제 1 지지 물질의 일부 위에 백금족 금속이 존재하는, 희박 NOx 트랩 조성물. - 제 35 항에 있어서,
상기 제 1 지지 물질의 일부 상의 백금족 금속이 로듐인, 희박 NOx 트랩 조성물. - 제 36 항에 있어서,
상기 로듐이 1 내지 20g/ft3 범위로 존재하는, 희박 NOx 트랩 조성물. - 제 34 항에 있어서,
상기 제 3 지지체가 Al2O3 및 ZrO2중 하나 이상을 포함하고, 상기 환원성 금속 산화물이 CeO2, MnO2, Mn2O3, Fe2O3, CuO 또는 CoO중 하나 이상 또는 이들의 혼합물인, 희박 NOx 트랩 조성물. - 제 34 항에 있어서,
상기 제 1 지지 물질이 세리아 100중량%를 포함하는, 희박 NOx 트랩 조성물. - 제 34 항에 있어서,
상기 제 2 지지체 상에 지지된 알칼리토금속이 산화바륨인, 희박 NOx 트랩 조성물. - 제 34 항에 있어서,
상기 제 3 지지 물질 상에 지지된 백금족 금속 성분이 로듐인, 희박 NOx 트랩 조성물. - 제 41 항에 있어서,
상기 제 3 지지체 상의 로듐이 1 내지 20g/ft3 범위로 존재하는, 희박 NOx 트랩 조성물. - 제 42 항에 있어서,
상기 로듐이 3 내지 7g/ft3 범위로 존재하는, 희박 NOx 트랩 조성물. - 제 38 항에 있어서,
상기 제 3 지지체가 CeO2, Al2O3, ZrO2중 하나 이상 또는 이들의 혼합물을 포함하는, 희박 NOx 트랩 조성물. - 제 34 항에 있어서,
상기 제 4 지지체가 CeO2, Al2O3, ZrO2중 하나 이상 또는 이들의 혼합물을 포함하는, 희박 NOx 트랩 조성물. - 제 45 항에 있어서,
상기 제 4 지지 물질 상에 지지된 백금족 금속 성분이 Pt 및 Pd를 포함하는, 희박 NOx 트랩 조성물. - 제 34 항에 있어서,
상기 제 4 지지체의 내화성 금속 산화물이 Mg, Mn 및 Zr의 산화물중 하나 이상으로 도핑된, 희박 NOx 트랩 조성물. - 희박 연소 내연 엔진으로부터의 배기 가스를 처리하는 방법으로서,
일산화질소를 함유하는 희박 배기 가스(lean exhaust gas)를 제 1 항에 따른 희박 NOx 트랩 조성물과 접촉시키고, 상기 희박 NOx 트랩 조성물을 농축된 배기 가스(enriched exhaust gas)와 간헐적으로(intermittingly) 접촉시킴을 포함하는, 방법. - 희박 연소 내연 엔진으로부터의 배기 가스를 처리하는 방법으로서,
일산화질소를 함유하는 희박 배기 가스를 제 34 항에 따른 희박 NOx 트랩 조성물과 접촉시키고, 상기 희박 NOx 트랩 조성물을 농축된 배기 가스와 간헐적으로 접촉시킴을 포함하는, 방법.
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| PCT/US2016/020607 WO2016141142A1 (en) | 2015-03-03 | 2016-03-03 | LEAN NOx TRAP WITH ENHANCED HIGH AND LOW TEMPERATURE PERFORMANCE |
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| US11339701B2 (en) | 2016-10-24 | 2022-05-24 | Basf Corporation | Integrated SCR catalyst and LNT for NOx abatement |
| KR20200055744A (ko) | 2017-10-12 | 2020-05-21 | 바스프 코포레이션 | 조합된 NOx 흡수제 및 SCR 촉매 |
| CN107649122B (zh) * | 2017-10-27 | 2020-11-06 | 中国科学院宁波城市环境观测研究站 | 一种用于氮氧化物净化的组合催化剂及其用途 |
| DE102018203859A1 (de) * | 2018-03-14 | 2019-09-19 | Ford Global Technologies, Llc | Verfahren, Verarbeitungs- und Steuereinheit sowie Anordnung zum Regenerieren eines LNT-Katalysators und Kraftfahrzeug |
| CN108636431A (zh) * | 2018-04-20 | 2018-10-12 | 中自环保科技股份有限公司 | 一种壁流式lnt催化剂、制备方法和应用 |
| CN109589976B (zh) * | 2018-12-31 | 2021-08-17 | 天津大学 | 基于氧化物复合主催化剂的柴油机用催化剂及制备方法 |
| JP7682799B2 (ja) * | 2019-03-20 | 2025-05-26 | ビーエーエスエフ モバイル エミッションズ カタリスツ エルエルシー | 調整可能なNOx吸着剤 |
| CN109806764B (zh) * | 2019-03-25 | 2021-04-16 | 中国科学院过程工程研究所 | 一种工业烟气储存还原脱硝系统和方法 |
| EP4072708A1 (en) | 2019-12-13 | 2022-10-19 | BASF Corporation | Lean nox trap plus low temperature nox adsorber for low temperature nox trapping |
| JP7344815B2 (ja) * | 2020-02-28 | 2023-09-14 | 株式会社Subaru | ガソリンリーンバーンエンジン用lnt積層触媒、及びこれを用いた排ガス浄化装置 |
| WO2023041514A1 (en) | 2021-09-14 | 2023-03-23 | Basf Corporation | Nox adsorber doc (na-doc) catalyst |
| CN116603574A (zh) * | 2022-11-15 | 2023-08-18 | 无锡威孚环保催化剂有限公司 | 一种柴油机尾气净化系统的稀燃NOx捕集催化剂及其应用 |
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| US10226754B2 (en) | 2019-03-12 |
| KR102611568B1 (ko) | 2023-12-11 |
| EP3277406A1 (en) | 2018-02-07 |
| EP3277406B1 (en) | 2023-08-02 |
| CN107530623A (zh) | 2018-01-02 |
| RU2017134080A3 (ko) | 2019-06-04 |
| EP4238650A3 (en) | 2023-11-08 |
| CN107530623B (zh) | 2021-07-13 |
| MX2017011249A (es) | 2018-07-06 |
| PL3277406T3 (pl) | 2024-02-05 |
| CA2978625A1 (en) | 2016-09-09 |
| WO2016141142A1 (en) | 2016-09-09 |
| JP2018513776A (ja) | 2018-05-31 |
| JP6895891B2 (ja) | 2021-06-30 |
| RU2708854C2 (ru) | 2019-12-11 |
| BR112017018822A2 (pt) | 2018-04-24 |
| RU2017134080A (ru) | 2019-04-03 |
| US20180043336A1 (en) | 2018-02-15 |
| EP3277406A4 (en) | 2018-10-17 |
| EP4238650A2 (en) | 2023-09-06 |
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