Effect of Strontium Addition to Platinum Catalyst for Propane Dehydrogenation  

作　　者：Huang Li Zhou Shijian Zhou Yuming Zhang Yiwei Zhang Shaobo Xu Jun 

机构地区：[1]School of Chemistry and Chemical Engineering,Southeast University [2]Nanjing Wolaide Energy Technology Co.,LTD

出　　处：《China Petroleum Processing & Petrochemical Technology》2012年第3期75-82,共8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 (50873026,21106017) for financial support

摘　　要：PtSnSr/HZSM-5 catalysts with different amounts of strontium were prepared by sequential impregnation method, and characterized by BET analysis, TEM, NH3-TPD, Hz-TPR, TPO and TG techniques. The results showed that the addition of strontium could modify the characteristics and properties of both acid function and metal function of Pt-Sn-based cata- lysts. In this case, PtSnSr/HZSM-5 catalyst with an appropriate amount of Sr （1.2%） showed higher catalytic activity and lower amount of coke deposits than PtSn/HZSM-5 catalyst. However, excessive loading of Sr could facilitate the reduction of Sn, which was unfavorable to the reaction. Afterwards, 1.0 m% of Na was added into the PtSnSr（1.2%）/HZSM-5 catalyst to improve the catalytic performance in propane dehydrogenation, and this catalyst displayed the best catalytic performance during our experiments. After having been subjected to reaction for 5 h, the PtSnNa（1.0%）Sr（1,2%）/HZSM-5 catalyst had achieved a higher than 95% selectivity towards propene along with a corresponding propane conversion rate of 32.2%.PtSnSr/HZSM-5 catalysts with different amounts of strontium were prepared by sequential impregnation method,and characterized by BET analysis,TEM,NH3-TPD,H2-TPR,TPO and TG techniques.The results showed that the addition of strontium could modify the characteristics and properties of both acid function and metal function of Pt-Sn-based catalysts.In this case,PtSnSr/HZSM-5 catalyst with an appropriate amount of Sr(1.2%) showed higher catalytic activity and lower amount of coke deposits than PtSn/HZSM-5 catalyst.However,excessive loading of Sr could facilitate the reduction of Sn,which was unfavorable to the reaction.Afterwards,1.0 m% of Na was added into the PtSnSr(1.2%)/HZSM-5 catalyst to improve the catalytic performance in propane dehydrogenation,and this catalyst displayed the best catalytic performance during our experiments.After having been subjected to reaction for 5h,the PtSnNa(1.0%)Sr(1.2%)/HZSM-5 catalyst had achieved a higher than 95% selectivity towards propene along with a corresponding propane conversion rate of 32.2%.

关 键 词：STRONTIUM propane dehydrogenation PROPENE HZSM-5. 

分 类 号：O643.32[理学—物理化学]