Diesel emission treatment using precious metal on titania aerogel
    1.
    发明授权
    Diesel emission treatment using precious metal on titania aerogel 失效
    在二氧化钛气凝胶上使用贵金属的柴油排放处理

    公开(公告)号:US5766562A

    公开(公告)日:1998-06-16

    申请号:US814068

    申请日:1997-03-10

    IPC分类号: B01D53/94 B01J23/40 B01J23/42

    摘要: The invention is a method for treating exhaust gases generated by a diesel engine by providing a sulfur-tolerant lean-NOx catalyst in an exhaust gas passage of the engine and contacting the catalyst with the exhaust gases. The sulfur-tolerant lean-NOx catalyst comprises a support of titania aerogel; and loaded thereon, using impregnation techniques from a solution of their precursors, at least 0.25 weight percent precious metal selected from platinum, palladium, rhodium, or mixtures thereof. The method converts the hydrocarbons, carbon monoxide and nitrogen oxides into more desirable gases. In particular, the NOx is converted to N.sub.2 and O.sub.2 over the catalyst.

    摘要翻译: 本发明是一种通过在发动机的排气通道中提供耐硫稀土氧化物催化剂并使催化剂与废气接触来处理由柴油发动机产生的废气的方法。 耐硫稀土氧化物催化剂包括二氧化钛气凝胶的载体; 并使用浸渍技术从其前体溶液中加入至少0.25重量%的选自铂,钯,铑或其混合物的贵金属。 该方法将烃,一氧化碳和氮氧化物转化成更理想的气体。 特别地,NOx在催化剂上转化为N 2和O 2。