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发明授权
CN101594925B 可热再生的一氧化氮吸附剂 有权

可热再生的一氧化氮吸附剂
摘要：
一种还原含一氧化氮(NO)的贫气流中的氮氧化物(NOx)的方法，包括以下步骤：(i)在低于200℃下，使NO本身从贫气流净吸附到含钯和二氧化铈的吸附剂；(ii)在200℃以上，使NO从NO吸附剂热净解吸到贫气流；和(iii)在催化剂而非NO吸附剂上，用选自以下的还原剂催化还原NOx：烃类还原剂、含氮还原剂、氢及它们中的任意两种或多种混合物。还公开了用于实施此方法的系统。
摘要（英）：

A method of reducing nitrogen oxides (NOx) present in a lean gas stream comprising nitric oxide (NO) comprises the steps of: (i) net adsorbing NO per se from the lean gas stream in an adsorbent comprising palladium and a cerium oxide at below 200 DEG C; (ii) thermally net desorbing NO from the NO adsorbent in a lean gas stream at 2000C and above; and (iii) catalytically reducing NOx on a catalyst other than the NO adsorbent with a reductant selected from the group consisting of a hydrocarbon reductant, a nitrogenous reductant, hydrogen and a mixture of any two or more thereof. A system for carrying out such a method is also disclosed.

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