Zn-Zr-Al oxides derived from hydrotalcite precursors for ethanol conversion to diethyl carbonate

作     者：Jian Zhang Tingting Yan Yusen Yang Jialue Sun Yanjun Lin Min Wei 张健;阎婷婷;杨宇森;孙嘉略;林彦军;卫敏

作者机构：State Key Laboratory of Chemical Resource EngineeringBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2019年第40卷第4期

页      面：515-522,M0002页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Key R&D Program(2017YFA0206804) the National Natural Science Foundation of China(21871021,21521005) the Fundamental Research Funds for the Central Universities(buctylkxj01,XK1802-6)~~ 

主　　题：Hydrotalcite Metal oxides Acid-base catalytic reactions Ethanol conversion 

摘      要：Ethanol conversion to high-value-added products has attracted considerable attention in both academic research and industrial *** this study,we synthesized a series of tunable acid–base bifunctional Zn-Zr-Al metal oxides(represented as Zn2ZrxAl-MMO)in light of the structural topotactic transformation of Zn2ZrxAl-hydrotalcite precursors(Zn2ZrxAl-LDH).The resulting Zn2ZrxAl-MMO catalysts were employed in the conversion of ethanol to diethyl *** Zr^4+ ion content of the LDH precursor plays a key role in modulating the acid-base properties and determining catalytic performance:the Zn2Zr0.1Al-MMO sample exhibits the optimal catalytic behavior with a diethyl carbonate(DEC)yield of 42.1%,which is the highest reported for metal oxide ***-property correlation investigations revealed that the synergic catalysis between medium-strong basic sites and weak acid sites plays a predominant role in the catalytic ***,in situ Fourier transform infrared measurements showed that the weak acidic site promotes activation adsorption of the reactant(urea)and the intermediate product(ethyl carbamate),while the medium-strong basic site accelerates ethanol ***,the Zn2Zr0.1Al-MMO catalyst has the advantages of cost effectiveness,good stability,and ***,the acid-base bifunctional catalysts developed in this work can be employed as promising candidates in acid-base catalytic reactions such as ethanol conversion.