燃料化学学报2017，Vol.45Issue(1)：75-83,9.
ZSM-5分子筛催化甲醇制汽油反应中的晶粒粒径效应研究
Effect of ZSM-5 crystal size on its catalytic properties for conversion of methanol to gasoline
摘要
Abstract
Four-sized monodispersed ZSM-5 crystals, being 70, 200, 400 and 650 nm, were hydrothermally synthesized by changing the H2 O/Si molar ratio in the synthesis gel, and characterized with XRD, TEM, BET and NH3-TPD techniques. The crystal size effect of ZSM-5 on its catalytic performance for conversion of methanol to gasoline ( MTG ) was investigated. It was shown that the external surface area of the sample decreased with its crystal size, while the acid site amount firstly increased, and then kept almost constant. Nevertheless, 650 nm ZSM-5 crystals attaching small particles exhibit large external surface area and strong acidity. The catalytic stability and the liquid hydrocarbon yield decreased with increasing crystal size. The sample with a crystal size of 70 nm shows a catalytic lifetime of 96 h and a gasoline yield of 30 . 8%. The large external surface area and relatively strong acidity endow the sample with a crystal size of 650 nm also has a catalytic lifetime of 91 h, indicating that synthesis of large ZSM-5 crystals with small crystallites adhered to their surface could be a potential way to improve the catalytic performance.关键词
ZSM-5分子筛/水硅物质的量比/晶粒粒径/扩散性能/催化性能Key words
ZSM-5/H2 O/Si molar ratio/crystal size effect/diffusion property/MTG catalytic performance分类
化学化工引用本文复制引用
邵娟,付廷俊,常江伟,万威利,齐瑞岳,李忠..ZSM-5分子筛催化甲醇制汽油反应中的晶粒粒径效应研究[J].燃料化学学报,2017,45(1):75-83,9.基金项目
The project was supported by the National Natural Science Foundation of China (21606160), Science and Technology Infrastructure Plat form Construction Program of Shanxi Procince (2015091009) and the Qualified Personnel Foundation of Taiyuan University of Technology ( tyut-rc201454a).国家自然科学基金(21606160),山西省科技基础平台建设项目(2015091009)和太原理工大学人才资助项目(tyut-rc201454a)资助 （21606160）
