文献类型：期刊文献

英文题名：Selective catalytic reduction of nitric oxide by hydrogen over NiFe2-xPdxO4 catalysts 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, Key Lab Environm Risk Assessment & Control Chem P, Sch Resources & Environm Engn State Environm Prot, Shanghai 200237, Peoples R China

年份：2016

卷号：283

起止页码：1137

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20153601245616);WOS:【SCI-EXPANDED(收录号:WOS:000364247100117)】；

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; NiFe2-xPdxO4

摘要：Selective catalytic reduction of NOx to nitrogen by hydrogen (H-2-SCR) does not result in any secondary pollutants and can reduce NOx at the lowest possible temperatures. To achieve this goal, proper catalysts are critical. In this paper, NiFe2-xPdxO4 catalysts were prepared using a sal-gel auto-ignition method for the selective catalytic reduction of NO with hydrogen (H-2-SCR) in the presence of oxygen at 150-250 degrees C. The NiFe2-xPdxO4 catalysts exhibited high SCR activity providing 100% NO conversion at 190 degrees C, and the activity improved as the palladium content increased. NiFe1.90Pd0.10O4 exhibited a slightly lower activity in the 180-220 degrees C range. NiFe1.93Pd0.07O4 and NiFe1.95Pd0.05O4 exhibited larger acidity, higher level of reducibility and catalytic activity, which was validated through NH3-TPR, H-2-TPR analysis and SCR activity tests. The XRD results indicated that the samples had a spinet cubic structure with good crystallization. The EDS results indicated that the Fe/Ni and Pd/Ni atomic ratio in the samples were consistent with the theoretical molecular formula (i.e., NiFe2-xPdxO4). The effects of GHSV, H-2/NO ratios and O-2 feed concentration on the NO conversion over the NiFe1.95Pd0.05O4 catalyst were also investigated. An increase in the 02 concentration from 0% to 6% and a decrease in the H-2/NO ratio from 10:1 to 5:1 produced only a slight decrease in the NO conversion. Studies on the effect of 3% and 5% H2O on the SCR activity concluded that the slight activity decrease, was due to reversible inhibition and weakly irreversible deactivation, and that the catalysts contained excellent water tolerance. (C) 2015 Elsevier B.V. All rights reserved.