上海交通大学学报

上海交通大学学报（自然版） ›› 2013, Vol. 47 ›› Issue (11): 1778-1782.

• 能源与动力工程 • 上一篇    下一篇

H2为还原剂的钙钛矿类催化剂存储还原NOx试验

李德立，陈晓玲，吴娇，覃萍，张武高
  

  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)
     
  • 收稿日期:2012-12-11
  • 基金资助:

    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）

Experimental Study of NOx Storage/Reduction Performance of Perovskite Catalysts, with H2 as Reductant

LI Deli,CHEN Xiaoling,WU Jiao,QIN Ping,ZHANG Wugao
  

  1. (Key Laboratory for Power Machinery and Engineering of the Ministry of Education, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2012-12-11

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.
 

 

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

Abstract:

To investigate NOx thermal storage and NOx storage/reduction (NSR) performance with H2 as reductant, perovskite catalysts were studied by 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 60% to 80% can be achieved between 350 ℃ and 400 ℃, which could help to reduce NOx in high condition.

Key words: internal combustion engines, NOx storage and reduction (NSR), LaCoO3/K2CO3/CeZrO2, temperatureprogrammed surface reaction (TPSR)

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