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31. 发明授权

US5935529A Exhaust gas cleaner and method for cleaning exhaust gas 失效
标题翻译：废气净化器和排气净化方法
公开(公告)号：US5935529A
公开(公告)日：1999-08-10
申请号：US706635
申请日：1996-09-06
申请人： Mika Saito , Kiyohide Yoshida
发明人： Mika Saito , Kiyohide Yoshida
IPC分类号： B01D53/94 , B01J23/89 , B01D53/34
CPC分类号： B01J23/89 , B01D53/9418 , B01D2251/208 , B01D2251/21 , B01D2255/1021 , B01D2255/104 , B01D2255/106 , B01D2255/202 , B01D2255/2063 , B01D2255/2065 , B01D2255/2068 , B01D2255/20707 , B01D2255/20715 , B01D2255/20738 , B01D2255/20746 , B01D2255/20753 , B01D2255/20761 , B01D2258/012 , B01D53/9477
摘要： An exhaust gas cleaner for removing nitrogen oxides by reduction from an exhaust gas containing nitrogen oxides, sulfur oxides, moisture, unburned or partially burned components and oxygen, a content of oxygen in the exhaust gas being larger than a stoichiometric amount required for completely oxidizing or burning the unburned or partially burned components, wherein the exhaust gas cleaner consists essentially of a first catalyst consisting essentially of a first porous inorganic oxide carrying at least one silver component, and at least one transition metal component selected from the group consisting of copper, iron, cobalt, nickel and compounds thereof; and a second catalyst selected from the group consisting of (a) a catalyst consisting essentially of a porous titania, (b) a catalyst consisting essentially of a second porous inorganic oxide carrying a titanium component, (c) a catalyst consisting essentially of the second porous inorganic oxide carrying at least one first component selected from the group consisting of copper, nickel, silver, cobalt and compounds thereof, at least one second component selected from the group consisting of titanium, zirconium and compounds thereof, and at least one third component selected from the group consisting of alkali metal elements and rare earth elements, and (d) a catalyst consisting essentially of the second porous inorganic oxide carrying a titanium component and at least one noble metal component selected from the group consisting of platinum, palladium, ruthenium, rhodium, iridium and gold.
摘要翻译：一种用于通过从含有氮氧化物，硫氧化物，水分，未燃烧或部分燃烧的组分和氧气的废气中还原而除去氮氧化物的排气净化器，废气中的氧含量大于完全氧化所需的化学计量量，燃烧未燃烧或部分燃烧的组分，其中废气净化器基本上由主要由至少一种银组分的第一多孔无机氧化物组成的第一催化剂和至少一种选自铜，铁，钴，镍及其化合物; 和选自以下的第二催化剂：（a）主要由多孔二氧化钛组成的催化剂，（b）主要由携带钛组分的第二多孔无机氧化物组成的催化剂，（c）主要由第二种携带至少一种选自铜，镍，银，钴及其化合物的第一组分的多孔无机氧化物，至少一种选自钛，锆及其化合物的第二组分和至少一种第三组分选自由碱金属元素和稀土元素组成的组中的至少一种，和（d）主要由携带钛组分的第二多孔无机氧化物和至少一种选自铂，钯，钌的贵金属组分组成的催化剂，铑，铱和金。

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