不同方法制备La_(2)O_(2)CO_(3)/ZnO催化乙醇转化的研究:孔结构和表面碱性的影响  

Ethanol conversion over La_(2)O_(2)CO_(3)/ZnO catalysts prepared by two methods:Effect of macroporous structure and basic sites

作　　者：虞鸿雁 SHIN Eunwoo 门勇[1] YU Hongyan;SHIN Eunwoo;MEN Yong(School of Chemistry and Chemical Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Department of Chemical Engineering,University of Ulsan,Ulsan 44610,South Korea)

机构地区：[1]上海工程技术大学化学化工学院,上海201620 [2]韩国蔚山大学化工学院,韩国蔚山44610

出　　处：《上海工程技术大学学报》2021年第3期253-258,共6页Journal of Shanghai University of Engineering Science

基　　金：上海市科委部分地方院校能力建设资助项目(18030501100);State Key Laboratory of Heavy Oil Processing;上海工程技术大学韩国蔚山大学联合培养资助项目。

摘　　要：利用共沉淀法和乙二醇燃烧法制备La_(2)O_(2)CO_(3)/ZnO两种催化剂,评价其对生物乙醇脱氢生成乙醛的催化活性,并采用FE−SEM,HR−TEM,FT−IR,XRD,BET,CO_(2)−TPD等研究手段对催化剂的形貌及表面碱性等物相结构进行表征.结果表明,制备方法对催化剂形貌以及性能影响十分明显,乙二醇燃烧法形成的大孔结构有助于乙醇的转化,同时产物乙醛的选择性与催化剂表面碱性有关.In this work,we prepared the La_(2)O_(2)CO_(3)/ZnO catalysts by two different methods-co-precipitation and ethylene glycol combustion method,whose catalytic performance of the dehydrogenation of ethanol to acetaldehyde as well as materials’properties related to the catalytic behavior through FE−SEM,HR−TEM,FT−IR,XRD,N_(2) adsorption/desorption technique were investigated.The catalyst synthesis method had greatly influenced the morphology and performance,with materials prepared through solution combustion method better in terms of ethanol conversion resulted from the macroporous structure.Characterization results based on CO_(2)−TPD revealed that catalyst synthesized through co-precipitation or solution combustion method allowed correlation of acetaldehyde selectivity with basicity.

关 键 词：共沉淀法 乙二醇燃烧法 大孔结构 脱氢反应 表面碱性 

分 类 号：O643.32[理学—物理化学]