热浸渍涂晶加旋转晶化制备亲水性ZSM-5沸石膜及其性能表征（英文）

发布时间：2018-10-05 21:30

【摘要】：采用热浸渍涂晶加旋转晶化方法在α-Al_2O_3微孔支撑体上合成了ZSM-5沸石膜,并将其应用于异丙醇/水体系渗透汽化脱水。对ZSM-5沸石膜的物相组成和显微结构进行表征,研究了合成时间、晶种浓度、制备方法对ZSM-5沸石膜性能的影响。结果表明:当第一次涂晶浓度为2g/L、二次晶化时间为28h时,制备出的ZSM-5沸石膜交互生长良好,膜层致密。对比3种合成方法(浸渍涂晶加旋转晶化法,热浸渍涂晶加旋转晶化法,热浸渍涂晶加静态晶化法)制备的ZSM-5沸石膜对90%异丙醇渗透汽化脱水性能。结果表明:热浸渍涂晶加旋转晶化法更适合制备亲水性ZSM-5沸石膜,制备出的沸石膜在348K时对90%异丙醇进行渗透汽化脱水,渗透通量可达到1.68 kg/(m~2·h),分离因子为17 991。
[Abstract]:ZSM-5 zeolite membrane was synthesized on 伪 -Al _ 2O _ 3 micropore support by means of hot impregnation coating and rotating crystallization, and was applied to pervaporation dehydration of isopropanol / water system. The phase composition and microstructure of ZSM-5 zeolite membrane were characterized. The effects of synthesis time, seed concentration and preparation method on the performance of ZSM-5 zeolite membrane were studied. The results show that when the first coating concentration is 2 g / L and the second crystallization time is 28 h, the ZSM-5 zeolite membrane grows well and the film layer is compact. The properties of pervaporation dehydration of 90% isopropanol on ZSM-5 zeolite membranes prepared by three synthetic methods (impregnation coating and rotation crystallization, hot impregnation and static crystallization) were compared. The results showed that the hot impregnation coating and rotation crystallization were more suitable for the preparation of hydrophilic ZSM-5 zeolite membrane. The permeable flux of 90% isopropanol was dehydrated by pervaporation at 348K, and the permeation flux was 1.68 kg/ (mt2 h), separation factor 17.991).
【作者单位】：武汉科技大学资源与环境工程学院;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;
【基金】：湖北省级教育部门基金项目(Q20121112)
【分类号】：TQ424.25;TB383.2

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