Isobutane Dehydrogenation Assisted by C02 over Silicalite-i-Supported ZnO Catalysts: Influence of Support Crystallite Size  

作　　者：Yajun Luo Chunling Wei Changxi Miao Yinghong Yue Weiming Hua Zi Gao 

机构地区：[1]Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Department of Chemistry,Fudan University,Shanghai 200438,China [2]Shanghai Research Institute of Petrochemical Technology SINOPEC,Shanghai 201208,China

出　　处：《Chinese Journal of Chemistry》2020年第7期703-708,共6页中国化学（英文版）

基　　金：the National Key R&D Program of China(2017YFB0602200);the National Natural Science Foundation of China(91645201);the Science and Technology Com mission of Shanghai Municipality(19DZ2270100);the Shanghai Research Institute of Petrochemical Technology SINOPEC(19ZC06070005).

摘　　要：The ZnO catalysts supported on Silicalite-1 zeolites with different crystallite sizes(0.08,0.35,1 and 1.7 jjm,respectively)and 5%Zn were synthesized via an incipient wetness method.The catalysts were characterized by XRD,N2 adsorption,SEM,TEM-EDX,DRIFT spectra and NH3-TPD,and their catalytic performance in isobutane dehydrogenation assisted by C02 was investigated.The catalytic activity is strongly dependent on the crystallite size of Silicalite-1 support.The ZnO/S-l-O.35 catalyst with ca.0.35 μmcrystallite size displays the highest activity,affording an initial isobutane conversion of 51.0%and 74.5%isobutene selectivity.This can be attributed to a higher amount of acid sites present on this catalyst as well as the largest amount of nest silanols possessed by the S-l-0.35 support.

关 键 词：method. CRYSTALLITE CATALYST 

分 类 号：O64[理学—物理化学]