文献类型：期刊文献

英文题名：Highly efficient Pd-doped aluminate spinel catalysts with different divalent cations for the selective catalytic reduction of NO with H2 at low temperature

作者：Xu, Chaochao[1];Sun, Wei[1];Cao, Limei[1];Li, Tingting[1];Cai, Xuanxuan[1];Yang, Ji[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：308

起止页码：980

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20164402957512);WOS:【SCI-EXPANDED(收录号:WOS:000389088000098)】；

基金：This research is based on work supported by the National Natural Science Foundation of China (21277045), the Public Welfare Project of the Ministry of Environmental Protection (201309021), the "Shu Guang" Project of the Shanghai Municipal Education Commission and the Shanghai Education Development Foundation, and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：NOx; SCR; Hydrogen; Aluminate; Spinel

摘要：The performance of pure and Pd-doped aluminate spinel catalysts (i.e., MAl2O4 and MAl1.95Pd0.05O4, where M = Cu, Co, Zn) for the selective catalytic reduction of NO by H-2 (H-2-SCR) were investigated in this paper. The catalytic performance over MAl2O4 is poor but can be improved significantly by incorporating Pd into the lattice, resulting in NO conversion over Co-AlPd, Zn-AlPd and Cu-AlPd catalysts of approximately 95%, 90.5% and 84%, respectively, in the presence of 2% O-2 at a low temperature range of 100-350 degrees C. Both the pure and Pd-doped aluminate spinel catalysts showed the same sequences with respect to activity: Co-Al > Zn-Al > Cu-Al and Co-AIPd > Zn-AlPd > Cu-AlPd, indicating that the selection of divalent metal M is of essential importance in designing spinel catalysts and in modifying their SCR performance. Co-AlPd catalyst showed stable activity in the presence of 3% and 5% H2O at 250 degrees C, whereas the SCR reaction was promoted and a slight positive influence of the NO conversion was observed with a further increase of the H2O concentration to 5%. The presence of 100 ppm SO2 in the feed resulted in almost a 23% NO reduction at 250 degrees C for the Co-AlPd catalyst, whereas only a 1.2% decrease of NO conversion was observed with further increase in the SO2 concentration to 150 ppm, and the NO conversion recovered rapidly to approximately 82% after removing the SO2 from the feed stream. (C) 2016 Elsevier B.V. All rights reserved.