Simultaneously catalytic removal of NOx and particulate matter on diesel particulate filter
The simultaneous removal of NOx and particulate 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 reduction was observed in the same temperature range of the CO2 formation, implying the occurrence of the simultaneous removal of NOx and PM in an oxidizing atmosphere. It was shown that SOF and soot in PM are attributed to the reduction 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 NO>O2>NO+O2. This is a combined process of PM trapping as well as the catalytic reactions of soot oxidation and NOx reduction, promising the most desirable after-treatment of diesel exhausts.
作 者： Liu Guanghui HUANG Zhen SHANGGUAN Wenfeng YAN Cunxian 作者单位： School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200030, China 刊 名： 科学通报(英文版) SCI 英文刊名： CHINESE SCIENCE BULLETIN 年，卷(期)： 2003 48(3) 分类号： X5 关键词： diesel NOx particulate matter simultaneous removal catalysis