KR920021199A - Catalyst system minimizes NH_3 production - Google Patents

Catalyst system minimizes NH_3 production Download PDF

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Publication number
KR920021199A
KR920021199A KR1019920000389A KR920000389A KR920021199A KR 920021199 A KR920021199 A KR 920021199A KR 1019920000389 A KR1019920000389 A KR 1019920000389A KR 920000389 A KR920000389 A KR 920000389A KR 920021199 A KR920021199 A KR 920021199A
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South Korea
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catalyst
stage
rhodium
catalyst system
palladium
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KR1019920000389A
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Korean (ko)
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페터 아디에고 월리엄
허틀 윌리엄
모리스 래크만 어윈
다이아마나고다 패틸 말라나고다
호스두르그 스와루프 스리니바스
루이스 윌리암스 짐미
라오 우시리카 라자
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원본미기재
코닝 인코포레이티드
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Publication of KR920021199A publication Critical patent/KR920021199A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure

Abstract

내용 없음.No content.

Description

NH3생성을 극소화하는 촉매시스템Catalyst system to minimize NH3 production

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 시판되는 자동차용 촉매 Pt/Rh/Al2O3/CeO2에 있어서 NOx, CO 및 탄화수소의 전환율 및 암모니아 생성량과 산화 환원율의 관계를 나타내는 그래프이다,FIG. 1 is a graph showing the relationship between the conversion rate of NO x , CO, and hydrocarbons, the amount of ammonia produced, and the redox rate in a commercial vehicle catalyst Pt / Rh / Al 2 O 3 / CeO 2 .

제2도는 Pt/Al2O3/CeO2/Rh/제올라이트 촉매에 있어서, NOx, CO, 및 탄화수소의 전환율 및 암모니아의 생성량과 산환환원율의 관계를 나타내는 그래프이다,2 is a graph showing the relationship between the conversion rate of NO x , CO, and hydrocarbons, the amount of ammonia produced, and the acid reduction rate in Pt / Al 2 O 3 / CeO 2 / Rh / zeolite catalysts.

제3도는 RH/제올라이트 촉매(제1단계)및 Pt/Al2O3/CeO2촉매(제2단계)에 있어서 NOx, CO, 및 탄화수소의 전환율 및 암모니아의 생성량과 산화환원율의 관계를 나타내는 그래프이다. 3 shows the relationship between the conversion rate of NO x , CO, and hydrocarbon, the amount of ammonia produced and the redox rate in the RH / zeolite catalyst (first step) and Pt / Al 2 O 3 / CeO 2 catalyst (second step) It is a graph.

Claims (12)

NOx. CO 및 탄화수소의 무해물질로의 전환을 촉매화하는데 적합한 다단계 촉매시스템에 있어서, 상기 시스템이 a)상기 NOx, 상기 CO및 상기 탄화수소를 포함하는 유동성 혼합물을 대부분의 NOx와 CO 및 탄화수소중 일부가 무해물질로 전환되는 제 1단계 반응이 수행되도록 접촉시키는 것으로 구성되는 제1단계와, b)상기 제1단계로부터의 유출혼합물을 CO및 탄화수소가 무해물질로 전환되는데 제2단계반응이 수행되도록 접속시키는 것으로 구성되는 제2단계를 포함하고, 상기 제1단계에서, 상기 유동성혼합물은 산화제에 대한 환원제의 몰비가 약0.8 약1.5이고, 상기 제1단계는 제1단계 촉매로 촉매화된 제1단계 기질로 이루어지며, 상기 제1단계 촉매는 귀금속성분 및 지지물성분을 포함하고, 상기 귀금속 성분은 로듐, 플라티늄과 로듐의 결합물질, 팔라듐과 로듐의 결합물질, 및 플라티늄과 팔라듐과 로듐의 결합물질로 이루어지는 군에서 선택된 귀금속을 포함하며, 상기 지지물성분을 분자체, 산화물, 세라믹, 및 이들의 결합물질로 이루어진 군에서 선택되고, 상기 제1단계 촉매는 수성가스 이동성분을 포함하지 않으며, 상기 제2단계는 제2단계 촉매로 촉매화된 제2단계기질로 이루어지고, 상기 제2단계 촉매는 수성가스 이동반응을 촉매적으로 활성화시킬 수 있으며, 상기 제2단계 촉매는 지지물 귀금속성분을 포함하고, 상기 귀금속성분은 플라티늄, 팔라듐 및 이들의 결합물질 이루어지는 군에서 선택되며, 상기 제2단계 촉매는 로듐을 포함하지 않고, 상기 시스템내의 상기 플라티늄 및/또는 필라듐 대 로듐의 중량비는 적어도 약15대 1이며, 상기 시스템의 처리 결과, 상당량의 암로니아가 발생됨이 없이 함유되어 있던 NOx, CO및 탄화수소중의 적어도 약80부피%가 무해물질로 전환되는 것을 특징으로 하는 촉매시스템.NO x . In a multistage catalyst system suitable for catalyzing the conversion of CO and hydrocarbons into harmless substances, the system comprises a) a fluid mixture comprising the NO x , the CO and the hydrocarbons, with the majority of NO x and CO and hydrocarbons. A first stage consisting of contacting the first stage reaction to convert the toxic substance into a harmless substance, and b) converting the effluent mixture from the first stage to CO and hydrocarbons into a harmless substance so that the second stage reaction is carried out. And a second step consisting of connecting, wherein in the first step, the flowable mixture has a molar ratio of reducing agent to oxidant of about 0.8 about 1.5, and the first step is a first catalyst catalyzed with a first stage catalyst It consists of a stage substrate, the first stage catalyst comprises a noble metal component and a support component, the precious metal component is rhodium, a binding material of platinum and rhodium, palladium and rhodium A binding material, and a precious metal selected from the group consisting of a binding material of platinum, palladium and rhodium, wherein the support component is selected from the group consisting of molecular sieves, oxides, ceramics, and binding materials thereof, and the first stage catalyst Does not include a water gas shift component, the second stage is composed of a second stage substrate catalyzed by a second stage catalyst, the second stage catalyst may catalytically activate the water gas shift reaction, The second stage catalyst comprises a support noble metal component, the noble metal component is selected from the group consisting of platinum, palladium and combinations thereof, and the second stage catalyst does not comprise rhodium and the platinum and / or in the system Or the weight ratio of filadium to rhodium is at least about 15 to 1, and the treatment of the system does not produce a significant amount of ammonia. Air catalyst system characterized in that the NO x, at least about 80% by volume of CO and hydrocarbon conversion to harmless substances were. 제1항에 있어서, 상기 산화제에 대한 환원제의 몰비가 약1.0내지 약1.25인 촉매 시스템.The catalyst system of claim 1 wherein the molar ratio of reducing agent to oxidant is from about 1.0 to about 1.25. 제1항에 있어서, 상기 분자체가 제올라이트인 촉매시스템.The catalyst system of claim 1, wherein the molecular sieve is zeolite. 제1항에 있어서, 상기 제1단계 촉매가 로듐, 및 로듐과 필라듐의 결합물질로 이루어지는 군에서 선택된 귀금속성분과 제올라이트, 알루미나 및 이들의 결합물질로 이루어지는 군에서 선택된 지지물성분으로 구성되는 촉매 시스템.The catalyst system of claim 1, wherein the first stage catalyst comprises noble metal components selected from the group consisting of rhodium, and a binding material of rhodium and piladium, and support components selected from the group consisting of zeolite, alumina, and combinations thereof. . 제4항에 있어서, 상기 시스템 처리결과 적어도 약95부피%의 NOx가 무해물질로 전환되는 촉매시스템.5. The catalyst system of claim 4, wherein at least about 95% by volume of NO x is converted into a harmless material as a result of said system treatment. 제4항에 있어서, 상기 제1단계 촉매가 로듐 및 펜타실구조의 제올라이트를 주성분으로 하는 촉매시스템.The catalyst system according to claim 4, wherein the first stage catalyst is composed mainly of zeolites having rhodium and pentasil structure. 제4항에 있어서, 상기 제1단계 촉매가 로듐, 팔라듐 및 펜타실구조의 제올라이트를 주성분으로하는 촉매시스템.The catalyst system according to claim 4, wherein the first stage catalyst is composed mainly of zeolites having rhodium, palladium and pentasil structures. 제4항에 있어서, 상기 제1단계 촉매가 로듐 및 감마 알루미나를 주성분으로 하는하는 촉매시스템.5. The catalyst system of claim 4, wherein the first stage catalyst is mainly composed of rhodium and gamma alumina. 제4항에 있어서, 상기 제1단계 촉매가 로듐, 팔라듐 및 감마 알루미나를 주성분으로 하는 촉매시스템.5. The catalyst system of claim 4, wherein the first stage catalyst is based on rhodium, palladium and gamma alumina. 제1항에 있어서, 상기 제2단계촉매가 알루미나, 세리아, 및 플라티늄, 팔라듐, 및 플라티늄과 팔라듐의 결합물질로 이루어지는 군에서 선택된 귀금속을 주성분으로하는 촉매시스템.The catalyst system of claim 1, wherein the second stage catalyst is composed of alumina, ceria, and precious metals selected from the group consisting of platinum, palladium, and a combination of platinum and palladium. 제1항에 있어서, 상기 기질이 세라믹, 유리세라믹, 금속, 금속산화물, 분자체 및 이들의 결합물질로 이루어지는 군에서 선택된 문질로 만들어진 것인 촉매 시스템.The catalyst system of claim 1, wherein the substrate is made of a material selected from the group consisting of ceramics, glass ceramics, metals, metal oxides, molecular sieves, and combinations thereof. NOx, CO및 탄화수소를 포함하는 유동성혼합물을 제1항의 촉매시스템을 사용하여 촉매와 접촉시키는 것을 포함하는 NOx, CO 및 탄화수소의 무해물질의 전환을 촉매화하는 방법.A process for catalyzing the conversion of harmless substances of NO x , CO and hydrocarbons comprising contacting a fluid mixture comprising NO x , CO and hydrocarbons with a catalyst using the catalyst system of claim 1. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920000389A 1991-05-20 1992-01-14 Catalyst system minimizes NH_3 production KR920021199A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101416352B1 (en) * 2008-11-28 2014-07-09 현대자동차 주식회사 Diesel fuel cracking catalyst and lean nox trap provided with the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101416352B1 (en) * 2008-11-28 2014-07-09 현대자동차 주식회사 Diesel fuel cracking catalyst and lean nox trap provided with the same

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