Co@NGr催化剂的制备及催化醛氧化酯化性能研究  

Preparation of Co@NGr Catalyst and Its Catalytic Performance for Oxidative Esterification of Aldehydes

作　　者：李淑越 尹德峰 郑艳霞 王静[1] 朱大庆 左村村 李玉超 LI Shu-yue;YIN De-feng;ZHENG Yan-xia;WANG JingZHU Da-qing;ZUO Cun-cun;LI Yu-chao(School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, China)

机构地区：[1]山东理工大学化学化工学院,山东淄博255049

出　　处：《聊城大学学报（自然科学版）》2020年第5期74-80,共7页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(21706149);山东省自然基金(ZR2017BB079);淄博市校城融合发展项目(2018ZBXC387)资助。

摘　　要：基于对催化剂催化醛氧化酯化性能的研究,分别选用氧化锰,氧化锌,炭黑(XC-72R)作为载体,合成了一系列氮掺杂石墨烯包裹钴核壳结构催化剂(Co@NGr/S,S为C,ZnO或MnO2),并将其应用于甲基丙烯醛(MAL)与甲醇(MeOH)的氧化酯化反应,研究了载体对反应的催化性能.采用XRD、Raman、TEM、BET、XPS、H2-TPR等手段对催化剂的结构性能和状态进行了表征.同时选用活性最高的Co@NGr/C催化剂,考察了催化剂焙烧温度,催化体系的醇醛比、催化剂浓度、反应温度、反应压力、活性组分负载量等单因素条件对催化剂活性的影响,探索出最适合Co@NGr/C催化剂催化甲基丙烯醛的反应条件.Based on the study of the catalytic performance of catalysts for oxidative esterification of aldehydes,a series of nitrogen doped and graphene coated cobalt catalysts(Co@NGr/S,S is C,ZnO or MnO2)were synthesized using manganese oxide,zinc oxide,and carbon black(XC-72R)as the support,which were applied to oxidative esterification of methacrylaldehyde(MAL)with methanol(MeOH)to prepare methyl methacrylate(MAL).The catalytic performance of support for the reaction was studied.The structure and state of the catalyst were characterized by XRD、Raman、TEM、BET、XPS、H2-TPR and other means.The catalyst Co@NGr/C exhibited the best catalytic performance due to the biggest surface area.The single-factor conditions of catalyst calcination temperature,catalyst system's alcohol-aldehyde ratio,catalyst concentration,reaction temperature,reaction pressure and active component loading on catalyst activity were investigated,and the most suitable reaction conditions were obtained.

关 键 词：氧化酯化 氮掺杂石墨烯 钴催化剂 核壳结构 

分 类 号：O643.3[理学—物理化学]