Mixed matrix membrane containing metal oxide nanosheets for efficient CO_(2)separation

作     者：Weifang Zhu Fu Liu Minmin Gou Ruili Guo Xueqin Li Weifang Zhu;Fu Liu;Minmin Gou;Ruili Guo;Xueqin Li

作者机构：School of Chemistry and Chemical EngineeringKey Laboratory for Green Process of Chemical Engineering of Xinjiang BingtuanShihezi UniversityXinjiangShihezi832003China 

出 版 物：《Green Chemical Engineering》 (绿色化学工程（英文）)

年 卷 期：2021年第2卷第1期

页      面：132-143页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：the National High Technology Research and Development Program of China(2012AA03A611) the National Natural Science Foundation of China,grant No.21868031. 

主　　题：CO_(2)separation ZnCo_(2)O_(4)nanosheets The mixed matrix membranes Synergistic effect Bimetallic oxide 

摘      要：The two-dimensional(2D)nanosheet zinc cobaltate(ZnCo_(2)O_(4))was added into polyether block amide(Pebax)matrix to prepare mixing matrix membrane(MMM)for separating carbon dioxide(CO_(2))/methane(CH4)gas mixture.The 2D porous ZnCo_(2)O_(4)nanosheets were composed of chemically interconnected metal oxide nanoparticles.The ZnCo_(2)O_(4)nanoparticles in the nanosheets constructed large-quantity pores of 11.78 nm and provided abundant transfer channels for gas molecule.Moreover,the synergistic effect of bimetallic Zn^(2+)and Co^(2+)would promote the generation of oxygen vacancies(Oδ-),which could provide more CO_(2)(Cδ+)adsorption sites,thereby increased the selectivity of the membrane.The large aspect ratio of the ultra-thin ZnCo_(2)O_(4)nanosheets showed better dispersion in the membrane.The pure gas separation performance data showed the CO_(2)permeability and CO_(2)/CH4 selectivity of Pebax/ZnCo_(2)O_(4)membrane were 139.10 Barrer and 15.38,respectively,when the filling amount was 0.5 wt%.Compared with pure Pebax membrane,the separation performance(permeability and selectivity)were increased with 165.67%and 75.57%,respectively.