掺K纳米LaMnO_3催化分解柴油机PM排放的研究  

Study on Decomposition of PM Emissions from Diesel Engine by K-Doped Nano-Catalyst LaMnO_3

作　　者：闫亚洲[1] 韩文赫[1] 张琳[1] 蔡忆昔[1] 王攀[1] 郑荣耀[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《内燃机工程》2012年第4期17-21,共5页Chinese Internal Combustion Engine Engineering

基　　金：教育部博士点基金项目(20103227110014);江苏省自然科学基金资助项目(BK2010330);江苏省高校自然科学研究项目(10KJB470001);江苏高校优势学科建设工程资助项目(苏政办发〔2011〕6号)

摘　　要：用K+取代纳米LaMnO3催化剂中20%的La3+,制备了纳米催化剂La0.8K0.2MnO3,利用SEM和BET方法对其结构进行表征。在试验台架上研究了排气温度对催化分解碳烟排放的影响,利用SEM和EDS对La0.8K0.2MnO3催化分解前后的颗粒物(particular matter,PM)样品进行对比分析。研究结果表明:2种催化剂均属于纳米级颗粒,La0.8K0.2MnO3催化分解碳烟效果较好;La0.8K0.2MnO3催化分解后,PM样品的粒径变小,排列更致密,C含量显著降低。The nano-catalyst LaMnO3 was modified by substituting 20% of La3＋ with K＋ , and nano- catalyst Lao. sKo. 2MnO3 was prepared. The structure of LaMnO3 and Lao.sKo.2MnO3 catalysts was characterized by SEM and BET. Effect of exhaust temperature on catalytic decomposition of soot was investigated by bench test. PM samples before and after the Lao.sKo.2MnO3 catalyst decomposition were analyzed by SEM and EDS. The results show that both two catalysts are of nanometer level, and the effect of Lao.8Ko.zMnO3 on decomposition of soot emissions is better than that of LaMnO3. Further, size of the PM samples after Lao.8 Ko. 2 MnO3 decomposition becomes smaller, its arrangement turns more compact, and the C content decreases prominently.

关 键 词：内燃机 柴油机 颗粒 纳米催化剂 台架试验 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]