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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
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)~~
关键词
中空纤维
膜接触器
填料
乙醇/水
分离
hollow fiber
membrane contactor
packing
ethanol-water
separation
