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首页> 外文期刊>Chinese science bulletin >Simultaneously catalytic removal of NO_x and particulate matter on diesel particulate filter
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Simultaneously catalytic removal of NO_x and particulate matter on diesel particulate filter

机译：同时催化去除柴油机颗粒过滤器上的NO_x和颗粒物

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摘要

The simultaneous removal of NO_x and particulate matter (PM) exhausted from diesel engine was studied with a diesel particulate filter (DPF) on which a mixed metal oxide catalyst, Cu_(0.95)K_(0.05)Fe_2O_4 was loaded. The NO_x reduction was observed in the same temperature range of the CO_2 formation, implying the occurrence of the simultaneous removal of NO_x and PM in an oxidizing atmosphere. It was shown that SOF and soot in PM are attributed to the reduction of NO_x at lower and higher temperatures, respectively. The oxidation of PM was enhanced by the coexistence of NO and O_2. The ignition and exhaustion temperatures of PM decrease as the order NO>O_2>NO+O_2. This is a combined process of PM trapping as well as the catalytic reactions of soot oxidation and NO_x reduction, promising the most desirable after-treatment of diesel exhausts.
机译：研究了用柴油颗粒过滤器（DPF）同时去除柴油机排放的NO_x和颗粒物（PM），该颗粒过滤器上装有混合金属氧化物催化剂Cu_（0.95）K_（0.05）Fe_2O_4。在与CO_2形成相同的温度范围内观察到NO_x的还原，这意味着在氧化气氛中同时除去了NO_x和PM。结果表明，PM中的SOF和烟灰分别归因于较低和较高温度下NO_x的减少。 NO和O_2的共存增强了PM的氧化。 PM的着火和排气温度按照NO> O_2> NO + O_2的顺序降低。这是PM捕集以及烟灰氧化和NO_x还原的催化反应的组合过程，有望实现最理想的柴油机废气后处理。

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