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    • 27. 发明公开
    • CATALYST FOR NITROGEN OXIDE DECOMPOSITION AND METHOD OF CLEANING NITROGEN OXIDE-CONTAINING EXHAUST GAS
    • 催化剂的氮氧化物含气体的净化氧化氮和方法的分解。
    • EP0451291A1
    • 1991-10-16
    • EP90915829.7
    • 1990-10-30
    • MITSUBISHI JUKOGYO KABUSHIKI KAISHA
    • IMAI, Tetsuya Mitsubishi Jukogyo K.K.
    • B01D53/86B01J29/42
    • B01D53/945C01B33/2884Y02A50/2324Y02T10/22
    • A catalyst composition effective in removing hazardous substances contained in combustion waste gas discharged from an industrial plant, an automobile, etc., and causing photochemical smog, such as NOx, CO and hydrocarbons, which has been developed on the basis of the finding that a crystalline silicate having specified chemical composition and crystalline structure and containing copper not only exhibits an extremely high activity as a catalyst for catalytic decomposition of NO but also is excellent in the selectivity of NO to N₂ and has a stable activity in the presence of oxygen and SOx, and that the content of NOx, CO and hydrocarbons is reduced near the theoretical air/fuel ratio and in a region higher than the theoretical air fuel ratio, that is when oxygen is present. More specifically this catalyst is effective as a catalyst for decomposing NOx in an exhaust gas into N₂ and O₂, and in particular it can effectively decrease the content of NOx, CO and hydrocarbons in an exhaust gas.
    • 一种用于分解Ñ氧化物催化剂(NOx)的包含结晶硅酸盐含Cu等。 结晶硅酸盐(1)被表示在状态脱水物,由通式(I)其中指定了氧化物的摩尔比,(1.0(+/-)0.4)R2O.a M2O3.b.Al2O3 Y!二氧化硅( I)其中R为碱金属离子和/或H原子; M为GP的元素的离子。 周期表的VIII,或钛,铬,铌,或Sb的; A + B = 1时,为大于0,B大于0,y大于-12 M优先。 Fe和Cr或Fe和含有NO x的废气的清洁有限公司的组合,CO和烃类是通过将气体和催化剂接触,在300-800摄氏度开展 结晶硅酸盐(1)不能获得自然的,但被合成为在下面的例子:(i)将组合。 的物质contg。 二氧化硅,物质contg。 GP的一些元素的氧化物。 的Ti,VN,铬,铌或Sb的周期表的VIII,或,物质contg。 l2O3,碱性物质,水和有机CPDS。 contg。 氮,硅酸盐被加热以产生结晶。 (ⅱ)反应混合。 其中存在以下摩尔比属于为:SiO2 /(M 2 O 3 +氧化铝)= 12 - 3000 - ,OH / 2 = 0 - 1.0 - ,H2SiO2 = 2 - 1000(PRE​​F(PREF 20200)(PREF 0.2 0.8)。。。 0-200),有机CPDS /(M 2 O 3 +氧化铝)= 5 - 0.5 200℃温度) - - 14 PREF天(1 - 50在30-300℃温度(PREF 130加热。10天) , 结晶硅酸盐含有的Cu(120%)具有氧化物的以下摩尔比:(H. Na)的2 O(0.1氧化铁0.9氧化铝)80层的SiO 2。 它达到的NO除去,一个C3H6除去95%和CO去除的97%的85%。