Exhaust gas cleaner and method of cleaning exhaust gas catalyst for
cleaning exhaust gas
    3.
    发明授权
    Exhaust gas cleaner and method of cleaning exhaust gas catalyst for cleaning exhaust gas 失效
    排气净化器和清洁排气用催化剂清洁排气的方法

    公开(公告)号:US5208202A

    公开(公告)日:1993-05-04

    申请号:US765580

    申请日:1991-09-25

    IPC分类号: B01D53/94 B01J23/04 B01J23/10

    摘要: The exhaust gas cleaner comprising a heat-resistant, porous body and a catalyst supported by the body for cleaning an exhaust gas containing substantially no fine carbonaceous particles, which is equivalent to an oxidizing atmosphere, the catalyst consisting essentially of (a) one or more alkali metal elements; (b) one or more transition metal elements in Group IB; Group IIB, Group VB, Group VIB, Group VIIB and Group VIII of the Periodic Table (excluding platinum-group elements), and Sn; and (c) one or more rare earth elements. The second catalyst consisting essentially of at least one platinum-group element, may be supported by the heat-resistant, porous body.

    摘要翻译: 所述排气净化器包括耐热多孔体和由主体支撑的催化剂,用于清洁基本上不含有微细碳质颗粒的排气,其等同于氧化气氛,所述催化剂基本上由(a)一种或多种 碱金属元素; (b)IB组中的一种或多种过渡金属元素; 第IIB族,VB族,VIB族,VIIB族和VIII族(不包括铂族元素)和Sn; 和(c)一种或多种稀土元素。 基本上由至少一个铂族元素组成的第二催化剂可以由耐热多孔体支撑。

    Exhaust gas cleaner and method of cleaning exhaust gas
    8.
    发明授权
    Exhaust gas cleaner and method of cleaning exhaust gas 失效
    废气净化器和排气净化方法

    公开(公告)号:US5384110A

    公开(公告)日:1995-01-24

    申请号:US993092

    申请日:1992-12-18

    IPC分类号: B01D53/94 B01J23/04 B01J23/10

    摘要: The exhaust gas cleaner comprising a heat-resistant, porous body and a catalyst supported by the body for cleaning an exhaust gas containing substantially no fine carbonaceous particles, which is equivalent to an oxidizing atmosphere, the catalyst consisting essentially of (a) one or more alkali metal elements; (b) one or more transition metal elements in Group IB; Group IIB, Group VA, Group VIA, Group VIIA, and Group VIII of the Periodic Table (excluding platinum-group elements), and Sn; and (c) one or more rare earth elements. The second catalyst consisting essentially of at least one platinum-group element, may be supported by the heat-resistant porous body.

    摘要翻译: 所述排气净化器包括耐热多孔体和由主体支撑的催化剂,用于清洁基本上不含有微细碳质颗粒的排气,其等同于氧化气氛,所述催化剂基本上由(a)一种或多种 碱金属元素; (b)IB组中的一种或多种过渡金属元素; IIB族,VA族,VIA族,VIIA族和VIII族(不包括铂族元素)和Sn; 和(c)一种或多种稀土元素。 基本上由至少一个铂族元素组成的第二催化剂可以由耐热多孔体支撑。

    Exhaust gas cleaner and method for cleaning same
    9.
    发明授权
    Exhaust gas cleaner and method for cleaning same 失效
    废气清洁剂及其清洗方法

    公开(公告)号:US5658543A

    公开(公告)日:1997-08-19

    申请号:US532260

    申请日:1995-09-22

    摘要: Nitrogen oxides are efficiently removed frown an exhaust gas containing nitrogen oxides and an excess amount of oxygen, by (i) disposing an exhaust gas cleaner in a flow path of the exhaust gas, the exhaust gas cleaner comprising a first catalyst comprising 0.2-15 weight % (on a metal basis) of silver or silver oxide supported on a porous inorganic oxide on the inlet side and a second catalyst comprising 0.2-15 weight % (on a metal basis) of silver or silver oxide and 2 weight % or less (on a metal basis) of copper or copper oxide supported on a porous inorganic oxide on the outlet side; (ii) introducing hydrocarbons and/or oxygen-containing organic compounds into the exhaust gas on the upstream side of the exhaust gas cleaner; and (iii) bringing the exhaust gas into contact with the exhaust gas cleaner at a temperature of 200.degree.-600.degree. C.

    摘要翻译: 通过(i)在排气的流路中设置废气清洁剂,氮氧化物被有效地除去含有氮氧化物和过量氧的废气,所述排气净化器包括第一催化剂,所述第一催化剂包含0.2-15重量份 负载在入口侧的多孔无机氧化物上的银或银氧化物的基于金属(基于金属的)%的第二催化剂和包含0.2-15重量%(基于金属的)银或氧化银和2重量%以下的第二催化剂 负载在出口侧的多孔无机氧化物上的铜或氧化铜的金属基) (ii)将碳氢化合物和/或含氧有机化合物引入废气净化器的上游侧的废气中; 和(iii)使排气与废气净化器在200℃-600℃的温度下接触。