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公开(公告)号:US5352337A
公开(公告)日:1994-10-04
申请号:US45692
申请日:1993-04-14
申请人: Tetsuro Kobayashi , Kazuo Kawahara , Katsushi Abe , Kiyoshi Yamazaki , Tomoko Iijima , Koji Yokota , Haruo Doi , Hiroyasu Iwahara
发明人: Tetsuro Kobayashi , Kazuo Kawahara , Katsushi Abe , Kiyoshi Yamazaki , Tomoko Iijima , Koji Yokota , Haruo Doi , Hiroyasu Iwahara
CPC分类号: B01D53/9413 , B01D53/326 , B01D53/9431 , F01N3/0892 , F01N3/20 , B01D2255/1021 , B01D2255/2042 , B01D2255/2063 , B01D2255/2065 , B01D2255/207 , B01D2255/806
摘要: A direct current voltage is applied between an anodic portion containing an oxidizing catalyst provided on one surface of a proton conductive solid electrolyte which separates the flow path of the gas to be treated into two parts, and a cathodic portion containing a reducing catalyst provided on the other surface of the solid electrolyte, the reducing catalyst comprising at least one selected from oxides of elements of Group 5A, Group 6A, and Group 7A of the periodic table, palladium, palladium alloys, transition elements carried on alumina, cerium oxide, and La.sub.1-x Sr.sub.x Co.sub.1-y Fe.sub.y O.sub.3 (where, 0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.1), while bringing a gas containing water vapor into contact with the anodic portion and bringing a gas containing nitrogen oxides into contact with the cathodic portion. As a result, the water vapor is electrolytically oxidized into protons and oxygen on the anodic portion, so that the protons having been transported to the cathodic portion can be utilized to reduce nitrogen oxides by the reducing power of hydrogen. The method efficiently reduces nitrogen oxides in a gas even under an oxidizing atmosphere.
摘要翻译: 在将质子传导性固体电解质的一个表面上提供的氧化催化剂的阳极部分施加直流电压,将待处理气体的流路分为两部分,以及含有还原催化剂的阴极部分, 固体电解质的其它表面,所述还原催化剂包含选自元素周期表第5A组,第6A组和第7A组元素的氧化物中的至少一种,钯,钯合金,氧化铝上载有的过渡元素,氧化铈和La1 -xSrxCo1-yFeyO3(其中,0 = x <= = 1,0