摘要
制备了系列金属氧化物催化剂,研究了富氧条件下单一金属氧化物同时催化去除碳颗粒和NOx的活性,考察了碳颗粒与催化剂之间的接触方式对催化活性的影响,并分析了碳颗粒和NOx催化同时去除的路径.结果表明,Cr、Mn、Co和Ni金属氧化物催化剂对碳颗粒和NOx同时去除具有较高的催化活性,并且在催化剂与碳颗粒之间"松散接触"方式下依然具有较高的活性;其同时催化去除碳颗粒和NOx的路径为,催化剂催化NO氧化成NO2,NO2促进碳颗粒氧化去除,而碳颗粒氧化的中间物CO还原NO,促进NOx还原去除.
A series of single metal oxide catalysts were prepared and their catalytic activities were investigated for simultaneous removal of soot and NOx in an oxygen rich condition. Effects of contact intensity between catalyst and soot as well as simultaneous removal paths for soot and NOx were also studied. Results showed that metal oxide catalysts of Cr, Mn, Co, and Ni exhibited high activities for simultaneous removal of soot and NOx and still had high activities in the loose contact mode between catalyst and soot. Simultaneous removal paths found were that NO2 formation by oxidation of NO promoted soot oxidation and CO formation by soot oxidation reduced NOx.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2009年第1期131-136,共6页
Acta Physico-Chimica Sinica
基金
哈尔滨工业大学科研创新基金资助项目
