文献类型：期刊文献

英文题名：NH3-SCR on Cu, Fe and Cu plus Fe exchanged beta and SSZ-13 catalysts: Hydrothermal aging and propylene poisoning effects

作者：Wang, Aiyong[1,2];Wang, Yilin[2];Walter, Eric D.[2];Washton, Nancy M.[2];Guo, Yanglong[1];Lu, Guanzhong[1];Peden, Charles H. F.[2];Gao, Feng[2]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Pacific Northwest Natl Lab, Inst Integrated Catalysis, POB 999, Richland, WA 99352 USA

年份：2019

卷号：320

起止页码：91

外文期刊名：CATALYSIS TODAY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000448295200011)】；

基金：The authors from Pacific Northwest National Laboratory (PNNL) gratefully acknowledge the US Department of Energy (DOE), Energy Efficiency and Renewable Energy, Vehicle Technologies Office for the support of this work. The research described in this paper was performed in the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the DOE's Office of Biological and Environmental Research and located at PNNL. PNNL is operated for the US DOE by Battelle. The authors from East China University of Science and Technology acknowledge support from National Basic Research Program of China (2013CB933200), National Natural Science Foundation of China (21577035, 21577034), Commission of Science and Technology of Shanghai Municipality (15DZ1205305) and 111 Project (B08021). Aiyong Wang also gratefully acknowledges the China Scholarship Council for a Joint-Training Scholarship Program with PNNL.

语种：英文

外文关键词：NH3-SCR; Cu; Fe; Beta; SSZ-13

摘要：Cu, Fe and Cu + Fe ion exchanged Beta and SSZ-13 catalysts were prepared by solution ion exchange using commercial NH4/Beta, and NH4/SSZ-13 that was prepared in-house. To study hydrothermal aging effects, Beta supported catalysts were aged hydrothermally at 700 degrees C and SSZ-13 supported catalysts were aged at 750 degrees C. In order to reveal the effects of Fe addition in the co-exchanged catalysts, these catalysts were characterized by means of powder X-ray diffraction (XRD), N2 adsorption-desorption, electron paramagnetic resonance (EPR), Al-27-nuclear magnetic resonance (Al-27-NMR) and propylene coking followed with temperature programmed reaction (TPR), and further tested with standard NH3-SCR with and without the presence of propylene. Collectively, the catalyst characterizations and reaction testing indicated minor beneficial effects of Fe addition in Cu, Fe/Beta, where NH3-SCR activity, N-2 selectivity and hydrothermal stability were all slightly improved. In contrast, Fe addition did not show apparent beneficial effects in low-temperature SCR for the Cu, Fe/SSZ-13 case. At elevated reaction temperatures, however, the presence of Fe indeed considerably improved NO conversion and N-2 selectivity for the hydrothermally aged Cu, Fe/SSZ-13 catalyst in the presence of propylene.