JP2009066596A - 排ガス中の二酸化硫黄の酸化の抑制方法 - Google Patents
排ガス中の二酸化硫黄の酸化の抑制方法 Download PDFInfo
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- B01J29/42—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 containing iron group metals, noble metals or copper
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Abstract
【解決手段】酸化銅とZSM−5および/またはゼオライトβを含み、さらにマグネシウムおよび/またはカルシウムの酸化物が添加されている排ガス浄化用触媒およびかかる触媒を用いた浄化方法。
【選択図】なし
Description
内燃機関として渦流室式ディーゼルエンジン(4気筒、3100cc)を用い、内燃機関の燃料として硫黄含有量が0.05質量%である軽油を用いる。
BET比表面積が450m2/g、SiO2/Al2O3モル比が80、平均結晶子径が0.05μm未満のH型ZSM5 250gを、硝酸銅(II)・三水和物51.6gを含有する水溶液に投入し、十分混合した後、120℃で13時間乾燥し、さらに電気炉において500℃で1時間焼成した。これにより、酸化銅を分散担持した銅・ZSM5粉末を得た。
硝酸マグネシウム・六水和物の37gの代わりに12gを用いた以外は、実施例1と同様に触媒を調製した。得られた触媒には、担体1リットルに対し、酸化銅(CuO)7g、ZSM5 95g、酸化マグネシウム1gが担持されていた。
硝酸マグネシウム・六水和物の37gの代わりに61gを用いた以外は、実施例1と同様に触媒を調製した。得られた触媒には、担体1リットルに対し、酸化銅(CuO)7g、ZSM5 95g、酸化マグネシウム5gが担持されていた。
硝酸マグネシウム・六水和物の37gの代わりに硝酸カルシウム・四水和物24gを用いた以外は、実施例1と同様に触媒を調製した。得られた触媒には、担体1リットルに対し、酸化銅(CuO)7g、ZSM5 95g、酸化カルシウム3gが担持されていた。
ZSM5 250gの代わりに、ZSM5(実施例1と同じ)185gとSiO2/Al2O3モル比が25のNH4型βゼオライト72gを用いた以外は、実施例1と同様に触媒を調製した。得られた触媒には、担体1リットルに対し、酸化銅(CuO)7g、ZSM5 70g、β型ゼオライト25g、酸化マグネシウム3gが担持されていた。
SiO2/Al2O3モル比が80のH型ZSM5を酢酸銅水溶液(アンモニア添加によりpH=11とする)に浸漬させた。十分に混合した後、120℃で一晩乾燥し、さらに500℃で1時間焼成し、銅/ZSM5粉末を得た。
Claims (5)
- 酸化銅とZSM−5および/またはゼオライトβを含み、さらにマグネシウムおよび/またはカルシウムの酸化物を含むことを特徴とする排ガス浄化用触媒。
- 前記酸化銅と前記マグネシウムおよび/またはカルシウムの酸化物との質量比は、酸化銅1質量部に対し、前記マグネシウムおよび/またはカルシウムの酸化物が0.1〜1質量部の範囲であることを特徴とする請求項1記載の触媒。
- 耐火性三次元構造体1リットル当たり、前記酸化銅を3〜14gおよび前記ZSM−5および/またはゼオライトβを50〜300g担持してなることを特徴とする請求項1または2に記載の触媒。
- 請求項1〜3のいずれか1項に記載の排ガス浄化用触媒に対し、炭化水素と窒素酸化物との体積比が1〜20である排ガスを接触させることを特徴とする排ガスの浄化方法。
- 前記排ガスはディーゼルエンジンからのものであることを特徴とする請求項4記載の方法。
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JP2008318442A JP5033781B2 (ja) | 2002-11-18 | 2008-12-15 | 排ガス中の二酸化硫黄の酸化の抑制方法 |
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JP2002333628A JP2004167306A (ja) | 2002-11-18 | 2002-11-18 | 排ガス浄化用触媒および排ガス浄化方法 |
JP2008318442A JP5033781B2 (ja) | 2002-11-18 | 2008-12-15 | 排ガス中の二酸化硫黄の酸化の抑制方法 |
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JP2004553188A Expired - Fee Related JP4594097B2 (ja) | 2002-11-18 | 2003-11-18 | 排ガス浄化用触媒および排ガス浄化方法 |
JP2008318442A Expired - Fee Related JP5033781B2 (ja) | 2002-11-18 | 2008-12-15 | 排ガス中の二酸化硫黄の酸化の抑制方法 |
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JP2004553188A Expired - Fee Related JP4594097B2 (ja) | 2002-11-18 | 2003-11-18 | 排ガス浄化用触媒および排ガス浄化方法 |
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US (1) | US7396793B2 (ja) |
EP (1) | EP1570903B1 (ja) |
JP (3) | JP2004167306A (ja) |
KR (1) | KR100774576B1 (ja) |
CN (2) | CN101664641B (ja) |
CA (1) | CA2506468C (ja) |
WO (1) | WO2004045765A1 (ja) |
ZA (1) | ZA200503956B (ja) |
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- 2002-11-18 JP JP2002333628A patent/JP2004167306A/ja active Pending
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2003
- 2003-11-18 EP EP03772854.0A patent/EP1570903B1/en not_active Expired - Lifetime
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- 2003-11-18 CN CN2009101747815A patent/CN101664641B/zh not_active Expired - Fee Related
- 2003-11-18 CN CNA2003801035277A patent/CN1711134A/zh active Pending
- 2003-11-18 WO PCT/JP2003/014649 patent/WO2004045765A1/ja active Application Filing
- 2003-11-18 CA CA002506468A patent/CA2506468C/en not_active Expired - Fee Related
- 2003-11-18 KR KR1020057008493A patent/KR100774576B1/ko not_active IP Right Cessation
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US20060073960A1 (en) | 2006-04-06 |
CN101664641B (zh) | 2013-04-24 |
JP2004167306A (ja) | 2004-06-17 |
JP5033781B2 (ja) | 2012-09-26 |
CA2506468C (en) | 2009-09-15 |
EP1570903A4 (en) | 2010-06-02 |
JPWO2004045765A1 (ja) | 2006-03-16 |
EP1570903B1 (en) | 2015-08-12 |
US7396793B2 (en) | 2008-07-08 |
JP4594097B2 (ja) | 2010-12-08 |
CN1711134A (zh) | 2005-12-21 |
EP1570903A1 (en) | 2005-09-07 |
ZA200503956B (en) | 2006-04-26 |
WO2004045765A1 (ja) | 2004-06-03 |
KR20050072140A (ko) | 2005-07-08 |
CA2506468A1 (en) | 2004-06-03 |
KR100774576B1 (ko) | 2007-11-12 |
CN101664641A (zh) | 2010-03-10 |
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