KR900009123A - 폐기 가스로 부터의 산화질소를 환원시키는 방법 - Google Patents

폐기 가스로 부터의 산화질소를 환원시키는 방법 Download PDF

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KR900009123A
KR900009123A KR1019890018343A KR890018343A KR900009123A KR 900009123 A KR900009123 A KR 900009123A KR 1019890018343 A KR1019890018343 A KR 1019890018343A KR 890018343 A KR890018343 A KR 890018343A KR 900009123 A KR900009123 A KR 900009123A
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zeolite
weight
process according
catalyst
iron
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KR1019890018343A
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KR930000642B1 (ko
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바케 미카엘
브란트 라인홀트
엥글러 베른트
키스 아코스
클라이네-묄 호프 페터
클라인슈미트 페터
코베르스타인 에드가
시라이 무스타파
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볼프강 머크, 로렌쯔 크레우즈비홀러
데구사 아크티엔게젤샤프트
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    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • B01J29/26—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • 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
    • 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
    • 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
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • B01J29/20—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing iron group metals, noble metals or copper
    • B01J29/24—Iron group metals or copper
    • 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
    • B01D2255/206—Rare earth metals
    • B01D2255/2065—Cerium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • 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
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20769—Molybdenum
    • 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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Abstract

내용 없음.

Description

폐기 가스로 부터의 산화질소를 환원시키는 방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도 내지 제3도는 200 내지 600℃의 온도 범위 및 20,OOOh-1의 공간 속도에서 수행한 촉매시험 측정 결과를 나타낸다.

Claims (17)

  1. 환원이 200 내지 600℃의 온도 및 촉매의 단위 면적당 0.5 내지 100m3i.N./h.m2의 하중에 상응하는 1,000내지 60,000-1의 공간 속도에서 구리-함유 및/또는 철-함유 내산성 제올라이트 상에서 발생함을 특징으로 하여, 산화질소를 함유하는 폐기 가스를 암모니아 가스와 혼합시키고, 전이금속을 함유하는 제올라이트 촉매 상으로 승온에서 이동시키는, 암모니아를 이용하는 산소-함유 폐기 가스중에 존재하는 질소의 산화물을 환원시키는 방법.
  2. 제1항에 있어서, 제올라이트가 또한 세륨을 함유함을 특징으로 하는 방법.
  3. 제1항에 있어서, 제올라이트가 또한 몰리브데늄을 함유함을 특징으로 하는 방법.
  4. 제1항 내지 3항중 어느 한 항에 있어서, 제올라이트가 모르데나이트형의 것임을 특징으로 하는 방법.
  5. 제4항에 있어서, 모르데나이트형 제올라이트가 8이상, 바람직하게는 10 내지 30, 더욱 특히는 15 내지 25의 SiO2: Al203몰비(모듐러스)를 가짐을 특징으로 하는 방법.
  6. 제1항 내지 5항중 어느 한 항에 있어서, 이의 이온 교환 용량내에서 전이금속 구리 및/또는 철 및, 임의로는, 또한 새륨 또는 몰리브데늄으로 하중된 제올라이트의 사용을 특징으로 하는 방법.
  7. 제1항 내지 6항중 어느 한 항에 있어서, 사용되는 제올라이트가 이의 중량을 기준으로 0.1 내지 13.5중량%, 바람직하게는 0.2내지 7.5중량%, 더욱 히는 0.3 내지 5중량%의 충전이 금속 함량을 가짐을 특징으로 하는 방법.
  8. 제7항에 있어서, 구리-함유 제올라이트가 제올라이트의 중량을 기준으로 0.2 내지 5.2중량%의 구리를 함유함을 특징으로 하는 방법.
  9. 제7항에 있어서, 철-함유 제올라이트가 제올라이트의 중량에 대해 0.1 내지 4.5중량%의 철을 함유함을 특징으로 하는 방법.
  10. 제6항 내지 9항 중 어느 한 항에 있어서, 제올라이트의 중량을 기준으로, 0.2 내지 5.2중량%의 구리 및/또는 0.1 내지 4.5중량%의 철이 각각 0.1 내지 1.0중량% 새륨과의 배합물로 존재함을 특징으로 하는 방법.
  11. 제6항 내지 9항중 어느 한 항에 있어서, 제올라이트의 중량을 기준으로 9.1 내지 5.2중량%의 구리 및/또는 0.1 내지 4.5중량%의 철이 각각 0.2 내지 2.5중량%의 몰리브대늄과의 배합물로 존재함을 특징으로 하는 방법.
  12. 제1항 내지 11항중 어느 한 항에 있어서, 촉매가 화학적으로 불활성인 성형 세라믹 또는 금속 담체상 표면 피복물의 형태, 바람직하게는 모노리륨성 또는 허니콤(honeycomb)형태(담채 촉매)로 사용됨을 특징으로 하는 방법.
  13. 제1항 내지 11항중 어느 한항에 있어서, 촉매가 결합재를 이용하여 성형되고, 벌크 또는 바람직하게는 모노리륨성 또는 허니콤 형태(고체촉매)중 성형 부재로서 사용됨을 특징으로 하는 방법.
  14. 제1항 내지 13항중 어느 한 항에 있어서, 환원이 250 내지 550℃, 바람직하게 280 내지 500℃, 더욱 특히는 300 내지 480℃에서 발생함을 특징으로 하는 방법.
  15. 제1항 내지 14항중 어느 한항에 있어서, 환원이 촉매 단위 면적당 1 내지 70, 바람직하게는 3 내지 45, 더욱 특히는 5 내지 15m3i.N./h.m2의 하중에 상응하는 2,000 내지 40,000, 바람직하게는 3,000 내지 20,000, 더욱 특히는 5,000 내지 10,000-1의 공간 속도에서 발생함을 특징으로 하는 방법.
  16. 제1항 내지 15항중 어느 한 항에 있어서, 암모니아 환원제에 대한 산화질소의 몰비를 0.6 내지 1.6, 바람직하게는 0.7 내지 1.1, 더욱 특히는 0.8 내지 1.0으로 사용함을 특징으로 하는 방법.
  17. 제1항 내지 16항중 어느 한 항에 있어서, 폐기 가스의 산소 합량이 0.1 용적%이상, 바람직하게는 0.5용적%이상, 더욱 특히는 1.0용적% 이상임을 특징으로 하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890018343A 1988-12-14 1989-12-12 폐가스로부터의 산화질소를 환원시키는 방법 KR930000642B1 (ko)

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Application Number Priority Date Filing Date Title
DE3841990A DE3841990A1 (de) 1988-12-14 1988-12-14 Verfahren zur reduktion von stickoxiden aus abgasen
DEP3841990.4 1988-12-14

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KR900009123A true KR900009123A (ko) 1990-07-02
KR930000642B1 KR930000642B1 (ko) 1993-01-29

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US (1) US5116586A (ko)
EP (1) EP0376025B1 (ko)
JP (1) JPH07100132B2 (ko)
KR (1) KR930000642B1 (ko)
AT (1) ATE112697T1 (ko)
AU (1) AU620479B2 (ko)
BR (1) BR8906426A (ko)
CA (1) CA2005412A1 (ko)
DD (1) DD290816A5 (ko)
DE (2) DE3841990A1 (ko)
DK (1) DK628589A (ko)
RU (1) RU1829954C (ko)

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US5116586A (en) 1992-05-26
DK628589A (da) 1990-06-15
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DE3841990C2 (ko) 1992-01-16
DE58908501D1 (de) 1994-11-17
ATE112697T1 (de) 1994-10-15
CA2005412A1 (en) 1990-06-14
DK628589D0 (da) 1989-12-13
RU1829954C (ru) 1993-07-23
EP0376025B1 (de) 1994-10-12
DE3841990A1 (de) 1990-06-21
AU4672189A (en) 1990-06-21
BR8906426A (pt) 1990-08-21
AU620479B2 (en) 1992-02-20
JPH02194819A (ja) 1990-08-01
DD290816A5 (de) 1991-06-13
EP0376025A1 (de) 1990-07-04

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