摘要
通过在γ Al2O3小球和柴油机微粒过滤器(DPF)上涂覆复合金属氧化物催化剂Cu0.95K0.05Fe2O4和La0.9K0.1CoO3,利用程序升温反应(TPR)技术,对同时催化去除柴油机微粒(PM)和NOx反应进行了试验研究。研究结果表明,La0.9K0.1CoO3催化剂比Cu0.95K0.05Fe2O4催化剂具有更高的同时去除PM—NOx的催化反应活性。在低负荷下,柴油机的PM由于SOF含量多而使NOx降低的幅度比高负荷下的大,其燃烧温度也比高负荷下的低。同时,NO和O2的共存促进了PM的氧化燃烧。另外,PM和催化剂之间"松接触"的催化活性要比"紧接触"低。
The simultaneous removal of NOxTB and particulate matter (PM) exhausted from diesel engine was studied by the Temperature Programmed Reaction (TPR) technique with γAl2O3 spherules and a diesel particulate filter (DPF), on which mixed metal oxide catalysts, Cu0.95K0.05Fe2O4 and La0.9K0.1CoO3 were loaded. The results have demonstrated that La0.9K0.1CoO3 catalyst has higher catalytic activity for simultaneous removal of PM-NOx than Cu0.95K0.05Fe2O4 catalyst. Compared to the case that PM is collected at high load of diesel engine, the conversion efficiency of NOx is higher under the condition of PM collected at low load and the combustion temperature of PM is lower with high SOF content. By the coexistence of NO and O2, the oxidation of PM is enhanced. And the catalytic activity with 'loose contact' condition between catalyst and PM is much lower than the 'tight contact' condition.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2003年第2期111-114,共4页
Transactions of Csice
基金
教育部高等学校博士学科点专项科研基金资助项目(20010248003)。
关键词
NOx
柴油机
排放
微粒
氮氧化物
催化
Diesel
Emission
Particulate matter
NO_x
Simultaneous removal
Catalysis
