新型中空纤维膜接触器用于乙醇/水体系分离的探索  

Ethanol-water separation in hollow fiber membrane contactor

作　　者：林兰[1] 张国亮[1] 孟琴[2] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310014 [2]浙江大学材料与化学工程学院,浙江杭州310027

出　　处：《化工学报》2007年第11期2822-2827,共6页CIESC Journal

基　　金：国家自然科学基金项目(20476096);浙江省科技计划重点项目(2006C23067;2005C33040)~~

摘　　要：Non-porous polyether sulfone hollow fibers(with a 5 μm poly(dimethylsiloxane)coating)were used as structured packing in the distillation of ethanol-water solutions.In this novel membrane contactor,liquid flowed through the lumens of the fibers,and vapor flowed countercurrently outside the fibers.The results showed that the new membrane contactor gave better,more productive separations than traditional packing in distillation.The minimal HETP of hollow fibers could reach as low as 5.8 cm,and the contactor worked well above the limit where flooding normally occurs in conventional cases.The overall mass-transfer coefficient and individual mass-transfer coefficients based on the gas side and liquid side were calculated respectively.The theoretical analysis indicated that the resistance in the liquid was responsible for more than half of the total resistance.Non-porous polyether sulfone hollow fibers （with a 5μm poly （dimethylsiloxane） coating） were used as structured packing in the distillation of ethanol-water solutions. In this novel membrane contaetor, liquid flowed through the lumens of the fibers, and vapor flowed countercurrently outside the fibers. The results showed that the new membrane contactor gave better, more productive separations than traditional packing in distillation. The minimal HETP of hollow fibers could reach as low as 5.8 era, and the contaetor worked well above the limit where flooding normally occurs in conventional cases. The overall masstransfer coefficient and individual mass-transfer coefficients based on the gas side and liquid side were calculated respectively. The theoretical analysis indicated that the resistance in the liquid was responsible for more than half of the total resistance.

关 键 词：中空纤维 膜接触器 填料 乙醇/水 分离 

分 类 号：TQ028.8[化学工程]