Catalytic activity of Cu-SSZ-13 prepared with different methods for NH_3-SCR reaction
Catalytic activity of Cu-SSZ-13 prepared with different methods for NH_3-SCR reaction作者机构：Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis East China University of Science and Technology
出 版 物：《Rare Metals》 (稀有金属（英文版）)
年 卷 期：2019年第38卷第3期
页 面：210-220页
核心收录：
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：financially supported by the National Key Research and Development Program of China (No. 2016YFC0204300) the National Natural Science Foundation of China (Nos. 21577034 and 21333003) the Science and Technology Commission of Shanghai Municipality (No. 16ZR1407900)
主 题：SSZ-13 zeolite Selective catalytic reduction Nitrogen oxides Preparation method Cu2+
摘 要：A series of Cu-SSZ-13 catalysts with the same Cu loading were prepared by different methods of incipient wetness impregnation [Cu-SSZ-13(IWI)], ion exchange[Cu-SSZ-13(IE)] and hydro-thermal synthesis [Cu-SSZ-13(HTS)]. Their activity for selective catalytic reduction of nitrogen oxides(NO_x) with NH3 was determined. The results show that the Cu-SSZ-13(HTS) catalyst exhibits a better ammonia selective catalytic reduction(NH3-SCR)activity compared with the other two catalysts, over which more than 90% NO conversion is obtained at 215-600℃under the space velocity of 180,000 h^(-1). The characterization results reveal that the Cu-SSZ-13(HTS) catalyst possesses more amount of stable Cu^(2+) in the six-membered ring and high ability for NH3 and NO adsorption, leading to its high NH3-SCR activity, although this catalyst has low surface area. On the other hand, the activity of Cu-SSZ-13(IE) catalyst is almost the same as that of Cu-SSZ-13(IWI) catalyst at the temperature lower than 400 ℃, but the activity of the former is much higher than that of the latter at 400 ℃ due to the high activity of Cu-SSZ-13(IWI) catalyst for NH3 oxidation.
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