等离子体辅助La_(0.9)K_(0.1)CoO_3同时催化去除NO_x和柴油机碳烟微粒的试验研究  

Simultaneously Catalytic Removal NO_x and Diesel PM over La_(0.9)K_(0.1)CoO_3 Catalysis Assisted by Plasma

作　　者：裴梅香[1] 林赫[1] 上官文峰[1] 黄震[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《燃烧科学与技术》2005年第3期278-281,共4页Journal of Combustion Science and Technology

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);国家自然科学基金资助项目(50376035);GM中国科学研究基金联合资助项目(50222203);中国博士后科学基金资助项目(2003033300).

摘　　要：通过在γ-Al2O3小球上涂覆复合金属氧化物La0.9K0.1CoO3,利用等离子体辅助催化程序升温反应(TPR)技术,对同时催化去除柴油机NOx和碳烟微粒反应进行了研究,并对其化学机理进行了探讨.研究结果证实,在富氧环境中,不论是在催化程序升温还是在等离子体催化程序升温中,CO2和N2的形成出现在相同的温度范围内.等离子体加强了同时催化去除NOx和碳烟微粒的反应特性,降低了碳烟微粒的燃烧温度,提高了NOx还原为N2的效率,也提高了低温和高温段NOx的分解,从而提高了总的NOx转化效率.The simultaneous catalytic removal of NOx and particulate matter (PM) from diesel exhaust was investigated over a mixed metal oxide catalyst of La0.9K0.1CoO3 loaded on γ-Al2O3 spherule with the assistant of non-thermal plasma. The results demonstrate that NOx is deoxidized by PM in oxygen rich atmosphere and the CO2 and N2 are produced in the same temperature window without consideration of the N2 formed by plasma decomposition. The activity of the catalyst is improved because the temperature for the PM combustion is lowered and the reduction efficiency of NOx to N2 is promoted during the plasma process. The NOx is dissociated by plasma at both low and high temperatures. Therefore, the whole efficiency of NOx conversion is enhanced.

关 键 词：柴油机 碳烟微粒 氮氧化物 等离子体辅助催化 同时催化去除 

分 类 号：X511[环境科学与工程—环境工程]