文献类型：期刊文章

作　　者：李静[1,2] 刘粟侥[1,2] 张怀科[1,3] 吕恩静[3] 任鹏举[1,3] 任杰[1,3]

机构地区：[1]中国科学院山西煤炭化学研究所煤间接液化国家工程实验室,山西太原030001 [2]中国科学院大学,北京100049 [3]中科合成油技术有限公司,北京101407

出　　处：《Chinese Journal of Catalysis》

基　　金：Synfuels China Co.Ltd.for the financial and equipments support

年　　份：2016

卷　　号：37

期　　号：2

起止页码：308-315

语　　种：中文

收录情况：AJ、BDHX、BDHX2014、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EI(收录号：20160801966496)、JST、RSC、SCI(收录号：WOS:000371376600013)、SCI-EXPANDED(收录号：WOS:000371376600013)、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：The ZSM-5 zeolite with an unusual snowflake-shaped morphology was hydrothermally synthesized for the first time,and compared with common ellipsoidal and boat-like shaped samples.These samples were characterized by N2 adsorption-desorption,X-ray fluorescence spectroscopy,scanning electron microscopy,X-ray diffraction,magic angle spinning nuclear magnetic resonance,temperature-programmed desorption of ammonia,and infrared spectroscopy of pyridine adsorption.The results suggest that the BET surface area and SiO2/Al2O3 ratio of these samples are similar,while the snowflake-shaped ZSM-5 zeolite possesses more of the（101） face,and distortion,dislocation,and asymmetry in the framework,resulting in a larger number of acid sites than the conventional samples.Catalysts for the methanol to olefin（MTO） reaction were prepared by loading Ca on the samples.The snowflake-shaped Ca/ZSM-5 zeolite exhibited excellent selectivity for total light olefin（72%） and propene（39%） in MTO.The catalytic performance influenced by the morphology can be mainly attributed to the snowflake-shaped ZSM-5 zeolite possessing distortion,dislocation,and asymmetry in the framework,and lower diffusion limitation than the conventional samples.

关 键 词：ZSM-5 zeolite  MODIFICATION Methanol to olefins  

分 类 号：O643.36] TQ221.2[化学类]