KR970703800A - 질소산화물-환원 촉매 및 배기가스내 질소산화물의 환원방법(nitrogen oxide-reducing catalyst and process for reducing nitrogen oxides in exhaust gas) - Google Patents

질소산화물-환원 촉매 및 배기가스내 질소산화물의 환원방법(nitrogen oxide-reducing catalyst and process for reducing nitrogen oxides in exhaust gas) Download PDF

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KR970703800A
KR970703800A KR1019960707165A KR19960707165A KR970703800A KR 970703800 A KR970703800 A KR 970703800A KR 1019960707165 A KR1019960707165 A KR 1019960707165A KR 19960707165 A KR19960707165 A KR 19960707165A KR 970703800 A KR970703800 A KR 970703800A
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다께시 다바따
미까꼬 고끼쓰
오사무 오까다
히로후미 오오쓰까
쥬세뻬 벨루씨
루이기나 마리아 플로라 사바띠노
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료오끼 신이찌로
오오사까 가스 가부시끼가이샤
제나리 마르코
에니리세르쉐 에스.피.에이.
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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
    • B01D53/92—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
    • 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
    • B01J29/70—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
    • B01J29/76—Iron group metals or copper
    • 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
    • B01D2255/00—Catalysts
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    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/204—Alkaline earth metals
    • B01D2255/2042—Barium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/204—Alkaline earth metals
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    • B01D2255/207—Transition metals
    • B01D2255/2073—Manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
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    • B01D2255/20746—Cobalt
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
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    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20753—Nickel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
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Abstract

본 발명은 Co/A1 비율이 0.2내지 0.6이 되도록 Co로 이온교환되고, Ca, Sr, Ba, La, Mn, Ag, In, 및 Ni중에서 선택된 하나 이상의 금속으로 로드된 BEA 제오라이트를 함유하는 NOx 환원촉매를 제공한다. 또한, 본 발명은 본 발명의촉매의 사용을 포함하는 NOx의 환원방법을 제공한다. 본 발명의촉매는 낮은 NOx 및 탄화 수소 농도에서도 촉매 활성을 방해하는 수증기 및 다른 물질을 함유하는 실제적인 배기가스 내에서의 낮은 온동에서 높은 활성, 높은 NOx 환원선별성 및 내구성을 제공한다.

Description

질소산화물-환원 촉매 및 배기가스내 질소산화물의 환원방법(NITROGEN OXIDE-REDUCING CATALYST AND PROCESS FOR REDUCING NITROGEN OXIDES IN EXHAUST GAS)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (12)

  1. Cp/A1비율이 0.2내지 0.6이 되도록 Co로 이온교환되고, Ca, Sr, Ba, La, Mn, Ag, In, 및 Ni중에서 선택된 하나 이상의 금속으로 로드된 BEA제오라이트를 함유하는, 산소-풍부 대기내 탄화수소에 의한 질소산화물을 환원용 촉매.
  2. Co/A1비율이 0.2내지 0.6이 되도록 Co로 이온교환되고, Ca, Sr, Ba 및 Mn 주엥서 선택된 하나 이상의 금소으로 로드된 BEA 제오라이트를 함유하는, 산소-풍부 대기내 탄화수소에 의한 질소산화물 환원용 촉매.
  3. Co/A1비율이 0.2내지 0.6이 되도록 Co로 이온교환되고, Ni로 로드된 BEA 제오라이트를 함유하는, 산소-풍부 대기내탄화수소에 의한 질소산화물 환원용 촉매.
  4. 제1항에 있어서, 먼저 Co로 이온교환되고 이어서 Ca, Sr, Ba, La, Mn, Ag, In, 및 Ni중에서 선택된 하나 이상의 금속으로의 침착에 의해 로드된 BEA 제오라이트를 함유하는 것을 특징으로 하는 촉매
  5. 제1항 내지 제4항에 있어서, BEA 제오라이트가 10 내지 100의 SiO2/A1203 비율을 갖는 것을 특징으로 하는 촉매.
  6. 제4항에 있어서, 침착된 금속의 양이 0.2 내지 5중량%인 것을 특징으로 하는 촉매.
  7. 제6항에 있어서, Co로 이온교환된 후에 로드되는 금속이 Ni이고 Ni의 양이 0.4내지 2중량%인 것을 특징으로 하는 촉매.
  8. Co/A1의 비율이 0.2내지 0.6의 Co/A1비율을 갖고 Ca, Sr, Ba, La, Mn, Ag, In, 및 Ni중에서 선택된 하나 이상의 금속으로 로드되며 10 내지 100의 SiO2/A12O3 비율을 갖는 BEA 제오라이트를 함유하는, 산소-풍부 대기내 탄화수소에 의한 질소산화물 환원용 촉매.
  9. 제5항 내지 제8항에 있어서, SiO2/A12O3 비율이 15내지 50의 범위내인 것을 특징으로 하는 촉매.
  10. Co로 이온교환되어, 0.2내지 0.6의 Co/A1비율을 갖고 Ca, Sr, Ba, La, Mn, Ag, In, 및 Ni중에서 선택된 하나 이상의 금속으로 로드된 BEA 제오라이트를 함유하는, 촉매와 배기가스를 접촉시키는 것으로 이루어진, 탄화 수소 및 과량의 산소를 포함하는 배기가스 내에서 2개 이상의 탄소를 갖는 탄화수소에 의한 질소산화물의 환원방법.
  11. 제10항에 있어서, 촉매가, 먼저 Co로 이온교환되고 이어서 0.2내지 5중량%로 Ca, Sr, Ba, La, Mn, Ag, In, 및 Ni중에서 선택된 하나 이상의 금속으로의 침착에 의해 로드되며 10내지 100의 SiO2/A12O3 비율을 갖는 BEA제오라이트를 함유하는 것을 특징으로 하는 NOx의 환원방법.
  12. 제11항에 있어서, 배기가스내에 함유된 메탄의 견지에서 계산된 탄화수소중 90% 이상이 4개 이하의 탄소를 갖는 것을 특징으로 하는 NOx의 환원방법
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960707165A 1995-04-17 1996-04-10 질소산화물환원촉매및배기가스내질소산화물의환원방법 KR100422193B1 (ko)

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JP11911495 1995-04-19

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CA (1) CA2192935A1 (ko)
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DE69614438T2 (de) 2002-06-13
US5993764A (en) 1999-11-30
JPH10503711A (ja) 1998-04-07
DE69614438D1 (de) 2001-09-20
KR100422193B1 (ko) 2004-05-24
WO1996033004A1 (en) 1996-10-24
EP0739651A1 (en) 1996-10-30
PT739651E (pt) 2002-02-28
ES2162642T3 (es) 2002-01-01
ATE204201T1 (de) 2001-09-15
DK0739651T3 (da) 2001-12-10
CA2192935A1 (en) 1996-10-24

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