Influence of the Alkali Treatment of HZSM-5 Zeolite on Catalytic Performance of PtSn-Based Catalyst for Propane Dehydrogenation  

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

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》2013年第2期11-18,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);Science and the National Nature Science Foundation of China(50873026,21106017)for financial support;the Specialized Research Fund for the Doctoral Program of Higher Education of China(20100092120047)

摘　　要：The porous material ATZ with micro-mesopore hierarchical porosity was prepared by alkali treatment of parent HZSM-5 zeolite and applied for propane dehydrogenation. The zeolite samples were characterized by XRD, N2- physisorption, and NH3-TPD analysis. The results showed that the alkali treatment can modify the physicochemical prop- erties of HZSM-5 zeolite. In this case, the porous material ATZ showed larger extemal surface area with less acid sites as compared to the HZSM-5 zeolite. It was found out that the alkali treatment of HZSM-5 zeolite could promote the catalytic performance of PtSn/ATZ catalyst. The possible reason was ascribed to the low acidity of ATZ. Furthermore, the presence of mesopores could reduce the carbon deposits on the metallic surface, which was also favorable for the dehydrogenation reaction.The porous material ATZ with micro-mesopore hierarchical porosity was prepared by alkali treatment of parent HZSM-5 zeolite and applied for propane dehydrogenation. The zeolite samples were characterized by XRD, N2-physisorption, and NH 3-TPD analysis. The results showed that the alkali treatment can modify the physicochemical properties of HZSM-5 zeolite. In this case, the porous material ATZ showed larger external surface area with less acid sites as compared to the HZSM-5 zeolite. It was found out that the alkali treatment of HZSM-5 zeolite could promote the catalytic performance of PtSn/ATZ catalyst. The possible reason was ascribed to the low acidity of ATZ. Furthermore, the presence of mesopores could reduce the carbon deposits on the metallic surface, which was also favorable for the dehydrogenation reaction.

关 键 词：HZSM-5 zeolite alkali-treatment propane dehydrogenation PROPENE 

分 类 号：O643.32[理学—物理化学]