以二甲醚重整气为还原剂的NO_x储存还原性能  

Experimental Study of NO_x Storage/Reduction Performance Using the Mixture of Stream Reforming of DME as Reducer

作　　者：张武高[1,2] 陈晓玲[1,2] 吴敏超[1,2] 

机构地区：[1]上海交通大学机械与动力工程学院 [2]动力机械与工程教育部重点试验室,上海200240

出　　处：《上海交通大学学报》2014年第6期741-745,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(51176119;50976070)

摘　　要：利用二甲醚(DME)水蒸气重整制氢(SR)为氮氧化物存储还原(NSR)技术提供还原剂,以去除DME发动机中NOx排放时,须考虑二甲醚水蒸气重整(DME-SR)对NOx转化率的影响.以Pt/Co-BaO/Al2O3为NSR催化剂,以CNZ-1/HZSM-5/Ga2O3为DME-SR的催化剂,试验研究了以DME重整气为还原剂的NOx存储还原性能,及水蒸气对NSR性能的影响.结果表明,将SR与NSR联用,可明显提高NOx转化率,在250℃时转化率可提高11%;尽管水蒸气对NOx的吸附有一定的抑制作用,但水蒸气参与DME重整,对NOx的转化率具有明显的促进作用.Dimethyl ether（DME） steam reforming （SR） could provide excellent reducing agent of H2 for NOx storage and reduction （NSR） technology to remove nitrogen oxide （NOx） emissions from DME engine. This paper studied the influence of DME reforming gas on the performance of NSR by using Pt/ Co-BaO/Al2O3 as NSR catalyst and CNZ-1/HZSM-5/Ga2O3 as the catalyst of DME steam reforming. The experimental result shows that the NSR performance is improved evidently by using the DME reforming gas as reductant. The conversion efficiency could be raised by 11%. Although the water vapor has some inhibition effect on the NO, adsorption, it participates in DME reforming and could produce evident promotion on the NOx conversion rate of NSR.

关 键 词：二甲醚 水蒸气重整 NOx存储还原 水蒸气 

分 类 号：TK46[动力工程及工程热物理—动力机械及工程]