KR900015816A - 촉진된 제올라이트 촉매를 사용하여 암모니아로 질소 산화물을 환원시키는 방법 - Google Patents

촉진된 제올라이트 촉매를 사용하여 암모니아로 질소 산화물을 환원시키는 방법 Download PDF

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KR900015816A
KR900015816A KR1019900005481A KR900005481A KR900015816A KR 900015816 A KR900015816 A KR 900015816A KR 1019900005481 A KR1019900005481 A KR 1019900005481A KR 900005481 A KR900005481 A KR 900005481A KR 900015816 A KR900015816 A KR 900015816A
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ammonia
zeolite
nitrogen oxides
zeolite catalyst
oxygen
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KR1019900005481A
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English (en)
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더블유. 비른 존
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로버트 에스. 알렉산더
엥겔하드 코포레이션
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Publication of KR900015816A publication Critical patent/KR900015816A/ko

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/064—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing iron group metals, noble metals or copper
    • B01J29/072—Iron group metals or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20738—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20761—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—Zeolites

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

내용 없음.

Description

촉진된 제올라이트 촉매를 사용하여 암모니아로 질소 산화물을 환원시키는 방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 NO의 전환을 대 다양한 금속으로 촉진된 제올라이트 촉매의 유입 온도를 나타내는 도면이다.
제2도는 NO의 전환을 대 숙성되고 구리로 촉진된 신선한 제올라이트 촉매를 위해 처리될 가스 스트림의 유입 온도를 나타낸 도면이다.
제3도는 NO의 전환을 대 숙성되고 철로 촉진된 신선한 베타 제올라이트 촉매를 통과한 가스 스트림의 유입 온도를 나타낸 것이다.

Claims (7)

  1. (a) 적어도 10의 실리카 대 알루미나의 비율을 가지며, 적어도 7옹스트롱의 평균 운동 기공 직경을 가지는 기공에 의해 모든 결정학적 3차원으로 상호 결합된 기공 구조를 가지는 제올라이트, (b) 금속 및 제올라이트 전체 중량에 기초하여 금속을 계산해서 0.1 내지 30중량%의 철 및 구리로 구성되는 군으로부터 선택된 촉진제로 되는 촉매 조성물과 함께 250 내지 600℃의 온도에서 질소 산화물 및 암모니아를 함유하는 가스 스트림과 접촉시키는 것으로 되는 암모니아로 질소 산화물을 환원시키는 방법.
  2. 제1항에 있어서, 촉진제가 촉매 물질 전체 중량의 1 내지 5 중량%으로 존재하는 방법.
  3. 제2항에 있어서, 촉진제가 철로 되는 방법.
  4. 제1, 2 또는 3항 중 어느 하나의 항에 있어서, 제올라이트가 USY, 베타 및 ZSM-20으로 구성되는 군 중에서 선택되는 방법.
  5. 제1, 2 또는 3항 중 어느 하나의 항에 있어서, 촉매 조성물이 제올라이트와 혼합된 내화성 결합제를 추가로 함유하는 방법.
  6. 제2항에 있어서, 제올라이트가 USY이고, 실리카 대 알루미나의 비율의 상한치가 30 미만인 방법.
  7. 제1, 2 또는 3항 중 어느 하나의 항에 있어서, 촉매 조성물이 반드시 상기 제올라이트, 상기 촉진제, 및 적합한 결합체로 구성되는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900005481A 1989-04-20 1990-04-19 촉진된 제올라이트 촉매를 사용하여 암모니아로 질소 산화물을 환원시키는 방법 KR900015816A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US341405 1989-04-20
US07/341,405 US4961917A (en) 1989-04-20 1989-04-20 Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts

Publications (1)

Publication Number Publication Date
KR900015816A true KR900015816A (ko) 1990-11-10

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KR1019900005481A KR900015816A (ko) 1989-04-20 1990-04-19 촉진된 제올라이트 촉매를 사용하여 암모니아로 질소 산화물을 환원시키는 방법

Country Status (10)

Country Link
US (1) US4961917A (ko)
EP (1) EP0393917B1 (ko)
JP (1) JP2904862B2 (ko)
KR (1) KR900015816A (ko)
AT (1) ATE125726T1 (ko)
CA (1) CA2012035C (ko)
DE (1) DE69021249T2 (ko)
DK (1) DK0393917T3 (ko)
ES (1) ES2075152T3 (ko)
GR (1) GR3017625T3 (ko)

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ES2075152T3 (es) 1995-10-01
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JP2904862B2 (ja) 1999-06-14
CA2012035A1 (en) 1990-10-20
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