多元组分相互作用对T型分子筛膜蒸气渗透性能的影响  

Effects of interaction between multi-components on vapor permeation performance with T-type zeolite membrane

作　　者：曲凡玉 张春 石锐 王学瑞 顾学红 QU Fanyu;ZHANG Chun;SHI Rui;WANG Xuerui;GU Xuehong(State Key Laboratory of Materials.Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学化工学院材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2018年第2期34-40,58,共8页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家高技术研究发展计划(863计划)(2015AA03A602);国家自然科学基金(21222602;21490585;21176117);江苏省杰出青年基金(BK20122040);江苏省自然科学基金青年基金(BK20130915);江苏高校优势学科建设工程

摘　　要：面向组成复杂的溶剂脱水需求,系统考察了T型分子筛膜对水-甲醇、水-乙醇、水-异丙醇二元体系及水-甲醇-异丙醇、水-乙醇-异丙醇三元体系的蒸气渗透分离性能。结果表明:在373 K下,当原料水质量分数为3%时,水-异丙醇体系中的水通量为1.05 kg/(m2·h),分别为水-甲醇和水-乙醇体系水通量的5倍和3.5倍;在水异丙醇体系中加入甲醇或乙醇后,由于甲醇或乙醇进入分子筛膜孔道内阻碍了水的传输,分子筛膜的水通量和分离因子均出现显著下降。通过孔度渗透的方法探讨不同组分与T型分子筛膜间的相互作用,结果表明:组分分子尺寸越小,其在膜孔内的吸附及毛细管冷凝现象越严重,随组分吸附量的增大,对膜孔的堵塞程度越大。研究显示T型分子筛膜的微结构具有良好的稳定性,不容易受组分的吸附行为的影响。For the dehydration of multi-component mixture,the vapor permeation performance of T-type zeolite membrane was examined in the systems including binary mixtures of water-methanol,water-ethanol,water-isopropanol,and ternary mixtures of water-methanol-isopropanol and water-ethanol-isopropanol.It was found that the water flux was 1.05 kg/(m 2·h)for dehydration of 3%water-isopropanol at 373 K,which was 5 and 3.5 times of those for dehydration of water-methanol and water-ethanol systems,respectively.The presence of methanol and ethanol would cause both decrease in water flux and separation factor due to the blocking of membrane pores by methanol and ethanol.The permporosimetry was used to evaluate the interaction between each component and T-type zeolite membrane.Results showed that the smaller the molecular size was,the bigger influence of its adsorption and capillary condensation on the blocking of pores was.In addition,T-type zeolite membrane was found to have good structural stability,which was not easy to be affected by component adsorption.

关 键 词：T型分子筛膜 蒸气渗透 多元体系 有机溶剂脱水 

分 类 号：TQ028.8[化学工程]