文献类型：期刊文献

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

作者：Xu, Chaochao[1];Sun, Wei[1];Cao, Limei[1];Yang, Ji[1]

机构：[1]E China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Ris Asses, Shanghai 200237, Peoples R China

年份：2016

卷号：289

起止页码：231

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20160201795376);WOS:【SCI-EXPANDED(收录号:WOS:000371559900026)】；

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; Hydrogen; SCR; Flue gas; Ferrite spinel

摘要：Palladium-doped ferrite spinels with various divalent metals (Co, Cu or Zn) were prepared using the sol-gel auto-ignition method for use in the selective catalytic reduction of NO with hydrogen (H-2-SCR). The activity of the Co-FePd catalyst was greatly enhanced by adding a small amount of palladium and resulted in approximately 96% NO conversion in the 170-250 degrees C range. In TPD and TPR analyses, Co-FePd exhibited a larger peak area and a lower reductive temperature than the other studied materials, indicating that this catalyst possesses stronger reduction ability and larger acidity; these properties were very important for the catalytic performance of Co-FePd, which showed the best SCR activity of the tested materials. The catalytic activities ranked in the following order: Co-FePd > Zn-FePd > Cu-FePd. Adding H2O to the reacting gas mixture slightly decreased NO conversion by the Co-FePd oxide. When the H2O content was increased from 3% to 5%, no further decline of NO conversion occurred. The presence of 100 ppm SO2 in the gas phase decreased the SCR activity of Co-FePd by approximately 19%, but no further deactivation was observed when the concentration was increased to 150 ppm. When SO2 was removed from the feed stream, NO conversion recovered rapidly; however, the conversion was not restored to the original level, indicating that SO2 has both a reversible and an irreversible effect on the H-2-SCR reaction. (C) 2016 Elsevier B.V. All rights reserved.