ZSM-5分子筛晶体形貌调控及其MTP催化性能研究  

Tuning crystal morphology of ZSM-5 zeolite and its effect on MTP catalytic performance

作　　者：袁德林 邢爱华 张妮妮 刘华 缪平 崔立山[3] 孙琦 YUAN De-lin;XING Ai-hua;ZHANG Ni-ni;LIU Hua;MIAO Ping;CUI Li-shan;SUN Qi(National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China;Department of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;College of Science,China University of Petroleum-Beijing,Beijing 102249,China)

机构地区：[1]北京低碳清洁能源研究院,北京102211 [2]北京石油化工学院化学工程系,北京102617 [3]中国石油大学(北京)理学院,北京102249

出　　处：《天然气化工—C1化学与化工》2019年第4期11-18,共8页Natural Gas Chemical Industry

基　　金：神华集团科技创新项目(No.:ST930014SH03)

摘　　要：通过调控凝胶配比和添加晶体生长抑制剂分别制备得到纳米颗粒和片状颗粒ZSM-5分子筛。系统考察了硅铝比相近的纳米颗粒和片状颗粒分子筛的物化性质,并对两者在甲醇转化制丙烯(MTP)反应中的催化性能评价对比。研究发现,两种形貌ZSM-5分子筛的结晶度、铝含量及铝分布相近,两者的差别主要体现在纳米颗粒ZSM-5分子筛外表面积和环己烷探针分子饱和吸附量更高,而片状颗粒ZSM-5分子筛沿晶体b轴厚度更薄和环己烷探针扩散速率更快。MTP评价结果显示,纳米颗粒ZSM-5分子筛具有更长的催化寿命(100h)以及更高的丙烯、丁烯选择性。The nano and flake particle ZSM-5 zeolites were synthesized, respectively, via tuning starting gel Si/Al ratio and adding crystal growth inhibitor. The physicochemical properties of the nano and flake ZSM-5 zeolites with similar Si/Al ratio were systematically investigated, and their catalytic properties in methanol to propylene (MTP) reaction were evaluated and compared. The results showed that the crystallinity, Al content and Al distribution of both zeolites were similar. However, the external specific surface area and the adsorption capacity of cyclohexane were higher for the nano particle ZSM-5 zeolite, and the length along the b axis of crystal was thinner and the adsorption rate was higher for the flake particle ZSM-5 zeolite. The nano particle ZSM-5 zeolite exhibited longer catalytic lifetime (100 h) and higher propylene and butylene selectivity in MTP reaction.

关 键 词：ZSM-5分子筛 晶体形貌 扩散 酸性 甲醇制丙烯(MTP) 

分 类 号：TQ426.6[化学工程] TQ221.21