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.

韦超广(1992-),男,硕士研究生,主要从事膜分离技术研究,cgwei0926@163.com