PDMS/PEI膜渗透汽化分离正丁醇/乙醇/水的性能及渗透通量关联模型研究  

Performance of PDMS/PEI membrane in separating butanol/ethanol/water system by pervaporation and correlation model of permeation flux

作　　者：韦超广 戚律 周元冲 徐荣[1] 张琪[1] 钟璟[1] WEI Chao-guang;QI Lv;ZHOU Yuan-chong;XU Rong;ZHANG Qi;ZHONG Jing(School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China)

机构地区：[1]常州大学石油化工学院江苏省绿色催化材料与技术重点实验室,江苏常州213164

出　　处：《现代化工》2017年第12期88-92,共5页Modern Chemical Industry

基　　金：国家自然科学基金(21276029);常州大学校基金(zmf15020101)

摘　　要：采用聚二甲基硅氧烷/聚醚酰亚胺(PDMS/PEI)膜渗透汽化分离正丁醇/乙醇/水体系,考察进料温度、进料组成等条件对膜渗透汽化分离性能的影响;采用Arrhenius型半经验渗透通量关联模型描述PDMS-PEI膜分离正丁醇/乙醇/水体系膜通量变化。结果表明,当原料液中正丁醇质量分数分别为4.0%、4.5%和5.0%时,正丁醇/乙醇/水三元体系中正丁醇渗透通量分别至少提高14.2%、17.7%和23.4%。渗透通量关联模型能较好地描述PDMS-PEI膜分离正丁醇/乙醇/水体系膜渗透通量变化。The butanol/ethanol/water system is separated by pervaporation method via a polydimethylsiloxane/polyetherimide（ PDMS/PEI） membrane.The influences of temperature and composition of feedstock and other operation conditions on the membrane pervaporation separation performance are investigated. The membrane permeation flux changes of butanol/ethanol/water system separated by PDMS/PEI membrane are correlated by Arrhenius-type permeation flux model.The results show that the individual pervaporation flux of butanol increases at least by 14. 2%,17. 7% and 23. 4% when the mass percentages of butanol in the raw ternary system are 4. 0%,4. 5% and 5. 0%respectively.The permeation flux correlation model describes well the membrane permeation flux changes when using PDMS/PEI membrane to separate the butanol/ethanol/water system.

关 键 词：渗透汽化 PDMS/PEI膜 正丁醇/乙醇/水 通量模型 

分 类 号：TQ028.8[化学工程]