Oxidative dehydrogenation of ethane with carbon dioxide over silica molecular sieves supported chromium oxides:Pore size effect

作     者：Zhibin Deng Xing Ge Wenting Zhang Shizhong Luo Jun Shen Fangli Jing Wei Chu Zhibin Deng;Xing Ge;Wenting Zhang;Shizhong Luo;Jun Shen;Fangli Jing;Wei Chu

作者机构：College of Civil Aviation Safety EngineeringCivil Aviation Flight University of ChinaGuanghan 618307China Sinopec Petroleum Exploration and Production Research InstituteNorthwest Oilfield BranchUrumqi 830011China School of Chemical EngineeringSichuan UniversityChengdu 610065China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第6期

页      面：77-86页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financial supports from National Natural Science Foundation of China(No.21603153) Science and Technology Department of Sichuan Province(No.2016HH0026) the Fundamental Research Funds for the Central Universities(No.YJ201544) 

主　　题：Ethylene SBA-15 Pore size effect Cr catalysts Heterogeneous catalysis 

摘      要：SBA-15 with varied pore size from 4 to 8 nm were synthesized by tuning the temperature of hydrothermal treatment,the supports were then used to load the active phase Cr Oxthrough a conventional impregnation *** resulting catalysts were characterized by small/wide angle XRD,N_(2) adsorption/desorption,FT-IR,TEM-EDX,XPS,TPR and CO_(2)-TPD to study the feature of structure,surface chemical state,redox and *** was found from these results that the metal species could be well dispersed on catalysts with larger pore ***^(6+)species could enter into the framework by substituting the Si atoms of SBA-15,and Cr^(3+)mainly exist on extra *** size had profound effects on reducibility,surface composition and ***^(6+)species were necessary to activate the C-H bonds of alkanes,while the basicity played an important role in activating C-O bonds of CO_(2).The best performances were achieved over the sample Cr supported on SBA-15 with a pore diameter of 7 nm in oxidative dehydrogenation of ethane in the presence of CO_(2).