文献类型：期刊文献

中文题名：Effect of barium sulfate modification on the SO2 tolerance of V2O5/TiO2 catalyst for NH3-SCR reaction

英文题名：Effect of barium sulfate modification on the SO_2 tolerance of V_2O_5/TiO_2 catalyst for NH_3-SCR reaction

作者：Tengfei Xu[1];Xiaodong Wu[1,2];Xuesong Liu[3];Li Cao[1];Qiwei Lin[4];Duan Weng[1]

机构：[1]Key Laboratory of Advanced Materials of Ministry of Education,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;[2]Yangtze Delta Region Institute of Tsinghua University,Jiaxing 314006,China;[3]College of Chemistry and Chemical Engineering,Shaoxing University,Shaoxing 312000,China;[4]Redbud Innovation Institute,Longyan,Fujian 364000,China

年份：2017

卷号：0

期号：7

起止页码：110

中文期刊名：环境科学学报：英文版

收录：CSTPCD、、Scopus、CSCD2017_2018、CSCD、PubMed

基金：the financial support from projects of the Ministry of Science and Technology,China(Nos.2015AA034603,2016YFC0205200);the Science and Technology Department of Zhejiang Province,China(No.2015C31015)

语种：英文

中文关键词：V2O5/TiO2催化剂;催化还原活性;反应;公差;硫中毒;硫酸盐;硫氧化物;硫酸钡

外文关键词：SCR catalyst Sulfur poisoning Barium sulfate Decomposable sulfate

中文摘要：Sulfur poisoning of V_2O_5/BaSO_4–TiO_2(VBT),V_2O_5/WO_3–TiO_2(VWT) and V_2O_5/BaSO_4–WO_3–TiO_2(VBWT) catalysts was performed in wet air at 350℃ for 3 hr,and activities for the selective catalytic reduction of NO_x with NH_3 were evaluated for 200–500℃.The VBT catalyst showed higher NO_x conversions after sulfur poisoning than the other two catalysts.The introduction of barium sulfate contributed to strong acid sites for the as-received catalyst,and eliminated the redox cycle of active vanadium oxide to some extent,which resulted in a certain loss of activity.Readily decomposable sulfate species formed on VBT-S instead of inactive sulfates on VWT-S.These decomposable sulfates increased the number of strong acid sites significantly.Some sulfate species escaped during catalyst preparation and barium sulfate was reproduced during sulfur poisoning,which protects vanadia from sulfur oxide attachment to a great extent.Consequently,the VBT catalyst exhibited the best resistance to sulfur poisoning.

外文摘要：Sulfur poisoning of V_2O_5/BaSO_4–TiO_2（VBT）,V_2O_5/WO_3–TiO_2（VWT） and V_2O_5/BaSO_4–WO_3–TiO_2（VBWT） catalysts was performed in wet air at 350℃ for 3 hr,and activities for the selective catalytic reduction of NO_x with NH_3 were evaluated for 200–500℃.The VBT catalyst showed higher NO_x conversions after sulfur poisoning than the other two catalysts.The introduction of barium sulfate contributed to strong acid sites for the as-received catalyst,and eliminated the redox cycle of active vanadium oxide to some extent,which resulted in a certain loss of activity.Readily decomposable sulfate species formed on VBT-S instead of inactive sulfates on VWT-S.These decomposable sulfates increased the number of strong acid sites significantly.Some sulfate species escaped during catalyst preparation and barium sulfate was reproduced during sulfur poisoning,which protects vanadia from sulfur oxide attachment to a great extent.Consequently,the VBT catalyst exhibited the best resistance to sulfur poisoning.