Inlfuence of the Alkali Treatment of HZSM-5 Zeolite on Catalytic Performance of PtSn-Based Catalyst

• 作 者: Huang Li Zhou Shijian Zhou Yuming Zhang Yiwei Xu Jun Wang Li
• 机 构: School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189;Nanjing Wolaide E
• 出 处: 中国炼油与石油化工（英文版）
• 发表日期: 2013年2期
• 关键词: HZSM-5 zeolite alkali-treatment propane dehydrogenation propene

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 extal 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.