JP2009183828A - 排ガス中のn2o除去方法 - Google Patents
排ガス中のn2o除去方法 Download PDFInfo
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- JP2009183828A JP2009183828A JP2008024798A JP2008024798A JP2009183828A JP 2009183828 A JP2009183828 A JP 2009183828A JP 2008024798 A JP2008024798 A JP 2008024798A JP 2008024798 A JP2008024798 A JP 2008024798A JP 2009183828 A JP2009183828 A JP 2009183828A
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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
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2251/20—Reductants
- B01D2251/208—Hydrocarbons
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2255/00—Catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/402—Dinitrogen oxide
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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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0027—Powdering
- B01J37/0036—Grinding
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/20—Capture or disposal of greenhouse gases of methane
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- Chemical Kinetics & Catalysis (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
【解決手段】N2Oを含有する排ガスにメタンを添加し、N2O分解触媒9を用いてN2Oを還元除去する排ガス中のN2O除去方法である。N2O分解触媒9を通過後のN2O濃度及びメタン濃度を測定し、これらの測定値に応じてメタン添加量を制御する。具体的には、N2O分解触媒の出口側の排ガスについて、温室効果ガス指数=(メタン排出量×21)+(N2O排出量×310)の式によって定義される温室効果ガス指数を算出し、その値を最小とするように制御を行う。
【選択図】図1
Description
N2O+1/4CH4→N2+1/4CO2+1/2H2O
N2O+2/3NH3→4/3N2+H2O
使用したN2O分解触媒は、前記した実施形態において用いたものと同じ、直径2mm、長さ5mmの円柱状に押し出し成形した鉄担持ゼオライトであり、これをカラム内部に充填し、排ガスを模擬したガスをSV=1100h−1で流した。
2 空気予熱器
3 第1加熱器
4 冷却塔
5 バグフィルタ
6 排煙処理塔
7 第2加熱器
8 還元剤供給装置
9 N2O分解触媒
10 煙突
11 N2O濃度検出器
12 メタン濃度検出器
13 制御手段
Claims (5)
- N2Oを含有する排ガスにメタンを添加し、N2O分解触媒を用いてN2Oを還元除去する排ガス中のN2O除去方法であって、N2O分解触媒を通過後のN2O濃度及びメタン濃度を測定し、これらの測定値に応じてメタン添加量を制御することを特徴とする排ガス中のN2O除去方法。
- メタン添加量は、N2O分解触媒の出口側の排ガスについて、温室効果ガス指数=(メタン排出量×21)+(N2O排出量×310)の式によって定義される温室効果ガス指数を減少させるように制御されることを特徴とする請求項1記載の排ガス中のN2O除去方法。
- N2O分解触媒として、鉄−ゼオライト系触媒を使用することを特徴とする請求項1記載の排ガス中のN2O除去方法。
- N2O分解触媒として、アルミナまたはゼオライト担体に貴金属を担持させた触媒を使用することを特徴とする請求項1記載の排ガス中のN2O除去方法。
- 排ガスが下水汚泥焼却炉の排ガスであることを特徴とする請求項1記載の排ガス中のN2O除去方法。
Priority Applications (2)
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JP2008024798A JP5576593B2 (ja) | 2008-02-05 | 2008-02-05 | 排ガス中のn2o除去方法 |
PCT/JP2009/051737 WO2009099038A1 (ja) | 2008-02-05 | 2009-02-03 | 排ガス中のn2o除去方法 |
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JP2008024798A JP5576593B2 (ja) | 2008-02-05 | 2008-02-05 | 排ガス中のn2o除去方法 |
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JP5576593B2 JP5576593B2 (ja) | 2014-08-20 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09884A (ja) * | 1995-06-16 | 1997-01-07 | Babcock Hitachi Kk | 排ガス中の亜酸化窒素などの除去方法と装置および触媒 |
JP2001140631A (ja) * | 1999-11-16 | 2001-05-22 | Toyota Central Res & Dev Lab Inc | 内燃機関の排気ガス浄化方法及び装置 |
JP2001286736A (ja) * | 2000-04-10 | 2001-10-16 | Natl Inst Of Advanced Industrial Science & Technology Meti | 亜酸化窒素ガス含有ガスの処理方法及びその処理触媒 |
JP2001317725A (ja) * | 2000-05-10 | 2001-11-16 | Ngk Insulators Ltd | 焼却炉からの地球温暖化物質の排出低減方法 |
JP2002180865A (ja) * | 2000-12-08 | 2002-06-26 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
JP2006272240A (ja) * | 2005-03-30 | 2006-10-12 | Tsukishima Kikai Co Ltd | 亜酸化窒素の除去方法 |
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2008
- 2008-02-05 JP JP2008024798A patent/JP5576593B2/ja active Active
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2009
- 2009-02-03 WO PCT/JP2009/051737 patent/WO2009099038A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09884A (ja) * | 1995-06-16 | 1997-01-07 | Babcock Hitachi Kk | 排ガス中の亜酸化窒素などの除去方法と装置および触媒 |
JP2001140631A (ja) * | 1999-11-16 | 2001-05-22 | Toyota Central Res & Dev Lab Inc | 内燃機関の排気ガス浄化方法及び装置 |
JP2001286736A (ja) * | 2000-04-10 | 2001-10-16 | Natl Inst Of Advanced Industrial Science & Technology Meti | 亜酸化窒素ガス含有ガスの処理方法及びその処理触媒 |
JP2001317725A (ja) * | 2000-05-10 | 2001-11-16 | Ngk Insulators Ltd | 焼却炉からの地球温暖化物質の排出低減方法 |
JP2002180865A (ja) * | 2000-12-08 | 2002-06-26 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
JP2006272240A (ja) * | 2005-03-30 | 2006-10-12 | Tsukishima Kikai Co Ltd | 亜酸化窒素の除去方法 |
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JP5576593B2 (ja) | 2014-08-20 |
WO2009099038A1 (ja) | 2009-08-13 |
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