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

查看全文 作　　者：Tengfei [1]Xu;Xiaodong [1,2]Wu;Xuesong [3]Liu;Li [1]Cao;Qiwei [4]Lin;Duan [1]Weng

机构地区：[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

出　　处：《Journal of Environmental Sciences》索引2017年第29卷第7期,共8页

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) 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. 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

相关文献

参考文献（42）
引证文献（14）
耦合文献（57）

参考文献(42)

引证文献(14)

耦合文献(57)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

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

参考文献(42)

引证文献(14)

耦合文献(57)

用户提示