Propane Dehydrogenation on PtSnNa/AlSBA-15 Catalyst:Influence of Tin as a Promoter  

作　　者：Duan Yongzheng Zhou Yuming Zhang Yiwei Sheng Xiaoli Xue Mengwei 

机构地区：[1]School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189 [2]Biochemical and Environmental Engineering College,Nanjing Xiaozhuang University,Nanjing 211171

出　　处：《China Petroleum Processing & Petrochemical Technology》2012年第1期37-45,共9页中国炼油与石油化工（英文版）

基　　金：the Production and Research Prospective Joint Research Project(BY2009153);the Science and Technology Support Program(BE2008129) of Jiangsu Province of China;the National Nature Science Foundation of China(50873026) for financial supports

摘　　要：PtSnNa/AlSBA-15 catalysts with different amounts of Sn were prepared for propane dehydrogenation.The catalysts were characterized by XRF,BET,H2 chemisorption,NH3-TPD,H2-TPR,and TPO techniques.Test results indicated that the presence of tin not only modified the acid function and the interfacial character between metal and support,but also reduced the coke deposition effectively.Among these catalysts investigated thereby,the PtSn(0.7%)Na/AlSBA-15 catalyst had the best catalytic performance in terms of propane conversion and stability.With the continuous addition of Sn,more amounts of Sn0 species appeared,which was unfavorable to the reaction.The PtSn(0.7%)Na/AlSBA-15 catalyst was parametrically characterized in order to obtain necessary information to integrate the process operating conditions.A weight hourly space velocity of 3 h-1,a reaction temperature of 610 ℃ and a H2/C3H8 molar ratio of 0.25 were found to be optimum conditions for achieving a higher dehydrogenation activity of the catalyst.PtSnNa/AlSBA-15 catalysts with different amounts of Sn were prepared for propane dehydrogenation.The catalysts were characterized by XRF,BET,H2 chemisorption,NH3-TPD,H2-TPR,and TPO techniques.Test results indicated that the presence of tin not only modified the acid function and the interfacial character between metal and support,but also reduced the coke deposition effectively.Among these catalysts investigated thereby,the PtSn（0.7%）Na/AlSBA-15 catalyst had the best catalytic performance in terms of propane conversion and stability.With the continuous addition of Sn,more amounts of Sn0 species appeared,which was unfavorable to the reaction.The PtSn（0.7%）Na/AlSBA-15 catalyst was parametrically characterized in order to obtain necessary information to integrate the process operating conditions.A weight hourly space velocity of 3 h-1,a reaction temperature of 610 ℃ and a H2/C3H8 molar ratio of 0.25 were found to be optimum conditions for achieving a higher dehydrogenation activity of the catalyst.

关 键 词：propane dehydrogenation PtSnNa/A1SBA-15 catalyst 

分 类 号：TQ241.11[化学工程—有机化工] TQ221.212