基于二维蛭石纳米片混合基质膜分离CO2/CH4性能研究OACHSSCD
Study on the separation performance on CO2/CH4 of mixed matrix membrane based on two-dimensional vermiculite nanosheet
本研究以聚醚-聚酰胺嵌段共聚物(Pebax)为高分子膜基质,二维蛭石纳米片(VMT)为填充剂,制备不同填充量的混合基质膜(Pebax-VMT MMMs).利用蛭石纳米片的结构以及其在混合基质膜内的排列方式,为CO2 构筑传输通道,同时提高膜对CO2/CH4 的分离性能.通过对Pebax-VMT MMMs的表征和气体分离特性进行研究,结果表明,填充VMT后混合基质膜在CO2/CH4 体系中的分离效果明显增强.当VMT填充量为5 wt%时,Pebax-VMT MMMs表现出了最优的CO2 分离性能,CO2 的渗透量为489.31 Barrer,CO2/CH4 的选择性为39.96,与纯Pebax膜相比,CO2 渗透量增加98.3%,同时CO2/CH4 的选择性增加84.2%.
In this study,polyether-polyamide block copolymer(Pebax)was used as the polymer membrane matrix and two-dimension-al vermiculite nanosheets(VMT)as the filler to prepare mixed matrix membranes(MMMs)with different filler amounts.The structure of VMT nanosheets and their arrangement within the MMMs were used to construct transport channels for CO2 within the membrane,which improved the separation performance of membrane on CO2/CH4.The characterization and gas separation properties of Pebax-VMT MMMs were investigated,showing that the separation of MMMs in CO2/CH4 system was significantly enhanced after being filled with VMT.The Pebax-VMT MMMs exhibited optimal CO2 separation performance with a CO2 permeation coefficient of 489.31 Barrer and a CO2/CH4 selectivity of 39.96 at a filler volume of 5 wt%.Compared with pure Pebax membrane,CO2 permeation coefficient in-creased by 98.3%and CO2/CH4 selectivity increased by 84.2%.
侯进鹏;马涛;李征光;曾文涛;田维亮
塔里木大学化学化工学院,新疆 阿拉尔 843300||新疆兵团南疆化工资源利用工程实验室,新疆 阿拉尔 843300塔里木大学化学化工学院,新疆 阿拉尔 843300
化学工程
聚醚-聚酰胺嵌段共聚物二维蛭石纳米片CO2/CH4分离CO2通道
Pebaxtwo-dimensional vermiculite nanosheetCO2/CH4 separationCO2 transport channels
《塔里木大学学报》 2024 (002)
30-39 / 10
塔里木大学校长基金硕士项目(TDZKSS202123);北京化工大学有机无机复合材料国家重点实验室开放课题项目(oic-202101011)
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