H2为还原剂的钙钛矿类催化剂存储还原NOx试验  

Experimental Study of NO_x Storage/Reduction Performance of Perovskite Catalysts,with H_2 as Reductant

作　　者：李德立[1] 陈晓玲[1] 吴娇[1] 覃萍[1] 张武高[1] 

机构地区：[1]上海交通大学动力机械与工程教育部重点实验室,上海200240

出　　处：《上海交通大学学报》2013年第11期1778-1782,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(51176119;50976070);内燃机燃烧学国家重点实验室开放基金项目(K2012-03)

摘　　要：以LaCoO3／K2CO3／CeZrO2为催化剂，分别采用程序升温脱附（TPD）、程序升温表面反应测试（TPSR）和以H2为还原剂的NOx存储-还原循环试验，研究了催化剂存储NOx的热稳定性以及NOx存储还原的性能，并分别对反应温度、还原时间和还原剂浓度这些影响因素进行了讨论．结果表明：LaCoO3／K2CO3／CeZrO2具有良好的储存和脱附再生性能，H2有较强的还原能力，在340～400℃下NOx转化率均为70％～80％，这些非常有利于降低发动机在实际工况下排放的NOx.To investigate NOx thermal storage and NOx storage/reduction （NSR） performance with H2 as reduetant, perovskite catalysts were studied hy using the temperature programmed desorption and temperature programmed surface recation method. Storage experiments and storage-reduction experiments were conducted on a simulation bench, which provided some insight into the influence of reaction temperature, reduction time, and using H2 as reductant. The result indicated that LaCoO3/K2CO3/CeZrO2 perovskite catalyst processed good NOx storage and reduction property. A NOx conversion ratio of 600/00 to 800/00 can be achieved between 350 ℃ and 400 ℃, which could help to reduce NO, in high condition.

关 键 词：内燃机 氮氧化物存储还原 钙钛矿类催化剂 程序升温表面反应测试 

分 类 号：TK46[动力工程及工程热物理—动力机械及工程]