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    Combination catalyst/adsorber system for treating an engine exhaust gas stream
    2.
    发明授权
    Combination catalyst/adsorber system for treating an engine exhaust gas stream 失效
    用于处理发动机废气流的组合催化剂/吸附器系统

    公开(公告)号：US5531068A

    公开(公告)日：1996-07-02

    申请号：US492379

    申请日：1995-06-19

    Applicant: Lawrence T. Kass ,  Timothy M. Cowan ,  Dennis Reinertsen ,  Stephen R. Dunne

    Inventor： Lawrence T. Kass ,  Timothy M. Cowan ,  Dennis Reinertsen ,  Stephen R. Dunne

    IPC: F01N3/08 ,  F01N3/20

    CPC classification number: F01N3/0835 ,  F01N3/0871 ,  F01N3/0878 ,  F01N2250/12 ,  F01N2410/12 ,  Y02T10/20

    Abstract: A process for treating an engine exhaust gas stream is disclosed. The process involves arranging a catalyst bed and a molecular sieve bed side by side with a connecting pipe between and parallel to the two beds. When the engine is first started, the cool exhaust is flowed through the catalyst bed, then through the connecting pipe, then through the molecular sieve bed and finally discharged to the atmosphere. When the molecular sieve bed reaches a temperature of about 150.degree. C. to about 200.degree. C. the exhaust stream is diverted such that it is first flowed through the molecular sieve bed, to desorb the adsorbed hydrocarbons, and then through the catalyst bed and finally discharged to the atmosphere. Finally, when all the hydrocarbons are desorbed from the molecular sieve bed, the exhaust stream is diverted such that it is flowed through the catalyst bed and then discharged to the atmosphere.

    Abstract translation: 公开了一种用于处理发动机废气流的方法。 该方法包括在两个床之间并且平行于两个床之间的连接管并排布置催化剂床和分子筛床。 当发动机首次启动时，冷却排气通过催化剂床，然后通过连接管，然后通过分子筛床，最后排放到大气中。 当分子筛床达到约150℃至约200℃的温度时，排气流被转向，使其首先流过分子筛床，以解吸吸附的烃，然后通过催化剂床和 终于排到了大气层。 最后，当所有的烃从分子筛床上解吸时，排气流被转向，使其流过催化剂床，然后排放到大气中。

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