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《科学通报(英文版)》 2003-03
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Simultaneously catalytic removal of NO_x and particulate matter on diesel particulate filter

LIU Guanghui, HUANG Zhen, SHANGGUAN Wenfeng & YAN Cunxian School of Mechanical and Power Engineering, Shanghai Jiao Tong Uni-versity, Shanghai 200030, China  
The simultaneous removal of NOx and particu-late matter (PM) exhausted from diesel engine was studied with a diesel particulate filter (DPF) on which a mixed metal oxide catalyst, Cu0.95K0.05Fe2O4 was loaded. The NOx reduc-tion was observed in the same temperature range of the CO2 formation, implying the occurrence of the simultaneous re-moval of NOx and PM in an oxidizing atmosphere. It was shown that SOF and soot in PM are attributed to the reduc-tion of NOx at lower and higher temperatures, respectively. The oxidation of PM was enhanced by the coexistence of NO and O2. The ignition and exhaustion temperatures of PM decrease as the order NOO2NO+O2. This is a combined process of PM trapping as well as the catalytic reactions of soot oxidation and NOx reduction, promising the most de-sirable after-treatment of diesel exhausts.
【CateGory Index】: TK423
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