聚乙烯醇膜在低w(乙醇)溶液中的渗透汽化性能  

Pervaporation performance of polyvinyl alcohol membrane in low w(ethanol)solution

作　　者：段文龙 王战辉[1] 李瑞瑞 龙蒙召 王爱民[1] 丁鑫 张智芳[1] DUAN Wenlong;WANG Zhanhui;LI Ruirui;LONG Mengzhao;WANG Aimin;DING Xin;ZHANG Zhifang(School of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,China;Energy Security Law Enforcement Detachment of Yulin,Yulin 719000,China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]榆林市能源安全执法支队,陕西榆林719000

出　　处：《化工科技》2024年第2期1-5,共5页Science & Technology in Chemical Industry

基　　金：国家自然科学基金项目(21763030);陕西省科技创新团队项目(2023-CX-TD-39);陕西省创新能力支撑计划项目(2020TD-032);陕西省科技计划项目(2022GY-145);榆林市科技计划项目(CXY-2021-104-01)。

摘　　要：以聚乙烯醇(PVA)膜为研究对象,通过改变w(乙醇)、温度和膜后真空度等条件,考察其在低w(乙醇)(w<5%)溶液中的渗透汽化行为。结果表明,渗透通量随着w(乙醇)增大而上升,分离因子呈下降趋势,出现临界值w(乙醇)=3%;渗透通量随着温度增加呈上升趋势,分离因子呈下降趋势,出现临界值t=50℃;渗透通量随着膜后真空度增加呈上升趋势,分离因子呈下降趋势。得出的结论对PVA膜的渗透和汽化行为具有一定的指导作用。The pervaporation behavior of polyvinyl alcohol(PVA)membrane in low w(ethanol)(w<5%)solution was investigated by changing the conditions of w(ethanol),temperature,and post membrane vacuum degree.The experimental results show that the permeation flux increases with the increase of w(ethanol),while the separation factor shows a downward trend,reaching a critical value of 3%.The permeation flux shows an increasing trend with the increase of temperature,while the separation factor shows a decreasing trend,reaching a critical value of 50℃.The permeation flux shows an increasing trend with the increase of vacuum degree after the membrane,while the separation factor shows a decreasing trend.The conclusions have a certain guiding effect on the permeation and vaporization behavior of PVA membranes.

关 键 词：渗透汽化 渗透通量 分离因子 

分 类 号：TQ028.8[化学工程]