催化学报

催化学报 ›› 2012, Vol. 33 ›› Issue (9): 1448-1454.DOI: 10.1016/S1872-2067(11)60439-7

• 研究快讯 • 上一篇    下一篇

BiMnO3 钙钛石上低温 NH3 选择性催化还原 NO

张一波1,2, 王德强1, 王静1, 陈去非1, 张震东1, 潘喜强1, 苗珍珍1, 张彬1, 武志坚1, 杨向光1,*   

  1. 1中国科学院长春应用化学研究所稀土资源利用国家重点实验室, 吉林长春 130022; 2中国科学院研究生院, 北京 100049
  • 收稿日期:2012-06-15 修回日期:2012-07-20 出版日期:2012-09-11 发布日期:2012-09-11

BiMnO3 Perovskite Catalyst for Selective Catalytic Reduction of NO with NH3 at Low Temperature

ZHANG Yibo1,2, WANG Deqiang1, WANG Jing1, CHEN Qufei1, ZHANG Zhendong1, PAN Xiqiang1, MIAO Zhenzhen1, ZHANG Bin1, WU Zhijian1, YANG Xiangguang1,*   

  1. 1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-06-15 Revised:2012-07-20 Online:2012-09-11 Published:2012-09-11

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摘要： 首次将钙钛石 BiMnO3 用于低温条件下 NH3 选择性催化还原 NO 反应中. 结果表明, 该催化剂在 100~240 oC 范围内表现出较好的催化活性. 实验和理论计算显示, 相对于 LaMnO3, BiMnO3 优异的低温催化活性归因于其较强的 Lewis 酸性和较多的表面吸附氧物种. 此外, BiMnO3 还具有较好的抗水、抗硫性能.

关键词: 钙钛石, 锰酸铋, 酸性, 选择催化还原, 低温

Abstract: A perovskite was used for selective catalytic reduction of NO with NH3 (NH3-SCR) at low temperature in the presence of excess oxygen. The BiMnO3 perovskite catalyst showed high activity in NH3-SCR at 100–240 oC. Experiment and DFT calculation showed that more Lewis acid sites and a high concentration of surface oxygen on BiMnO3 as compared with LaMnO3 were responsible for its better performance. In addition, BiMnO3 was also resistant to water vapor and a mixture of H2O and SO2.

Key words: perovskite, bismuth manganite, acidity, selective catalytic reduction, low temperature