ZSM-5沸石膜的制备及其耐酸性能研究  

Preparation and acid resistance of ZSM-5 zeolite membrane

作　　者：陈思龙 周志辉[1,2] 吴红丹[1,2] 刘宏瑞 Chen Silong;Zhou Zhihui;Wu Hongdan;Liu Hongrui(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081

出　　处：《武汉科技大学学报》2020年第3期194-200,共7页Journal of Wuhan University of Science and Technology

基　　金：湖北省自然科学基金资助项目(2018CFB373).

摘　　要：以α-Al2O3为载体,借助二次生长法,在无模板剂的条件下制备出ZSM-5沸石膜,结合酸液浸泡及渗透汽化分离实验研究了所制ZSM-5沸石膜的渗透汽化性能及其在酸溶液体系中的耐酸性能。结果表明,在75℃条件下,所制ZSM-5沸石膜对质量分数为90%的异丙醇水溶液的渗透通量和分离因子分别可达1.73 kg·m^-2·h^-1和1800;经pH值不同的硝酸或乙酸溶液浸泡15天,ZSM-5沸石膜始终保持良好的渗透汽化分离能力,表面Si/Al原子比稳定,沸石膜耐酸性较好。By usingα-Al2O3 as the carrier,the ZSM-5 zeolite membrane was prepared via the secondary growth method without template.Combined with acid immersion and pervaporation separation experiments,the pervaporation performance of the prepared ZSM-5 zeolite membrane and its acid resistance in acid solution system were studied.The results show that when dehydrating isopropyl with a mass fraction of 90%at 75℃,the permeation flux and separation factor of the ZSM-5 zeolite membrane can reach 1.73 kg·m^-2·h^-1 and 1800,respectively.After being immersed in nitric acid or acetic acid solutions with different pH values for 15 days,the ZSM-5 zeolite membrane still maintains good pervaporation separation capability,Si/Al atomic ratio of the surface is stable,and the zeolite membrane has good acid resistance.

关 键 词：ZSM-5沸石膜 渗透汽化 酸液浸泡 Si/Al原子比 耐酸性能 

分 类 号：TQ051.893[化学工程]