不同中空纤维膜组件对甲烷和氧气无泡曝气过程的影响  

Effects of Different Hollow Fiber Membrane Modules on Bubbleless Aeration of Methane and Oxygen

作　　者：段长虹[1] 罗明芳[1] 杨程[2] 江皓[2] 邢新会[2] 

机构地区：[1]中国科学院研究生院材料科学与光电技术学院,北京100049 [2]清华大学化学工程系,北京100084

出　　处：《过程工程学报》2010年第2期395-399,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20606036;20976186);中国科学院优秀博士学位论文;院长奖获得者科研启动专项资金资助项目

摘　　要：为探索无泡膜曝气用于甲烷高效、安全生物转化的可能性,测试了3种中空纤维膜组件对甲烷和氧气传质速率的影响.所测膜组件分别为致密硅胶中空纤维膜(A)、疏水性微孔聚丙烯中空纤维膜(B)及亲水性微孔聚醚砜中空纤维膜(C).结果表明,膜组件A和B可以同时强化甲烷和氧气的气液传质过程,对甲烷进行无泡曝气,两者的体积甲烷传质系数(KLa)相近,分别为3.19和3.78h·1,约为传统鼓泡曝气的3倍.对空气进行无泡曝气时,膜组件B的KLa值(溶氧)为61.1h·1,是A的2.6倍,是传统鼓泡曝气的24.8倍.To explore the possibility of bubble-free membrane aeration in the biotransfer of methane safely and efficiently,the effects of hollow fiber membrane modules on the mass transfer rates of methane and oxygen were examined in this work.Three membrane modules,dense silicone membrane（A）,hydrophobic microporous polypropylene membrane（B）,and hydrophilic microporous poly（ether sulfone） membrane（C）,were investigated.The investigation results show that the gas-liquid mass transfer rates of methane and oxygen can be improved significantly for modules A and B.For the bubbleless aeration of methane（for the case that methane is bubbleless aerated）,the volumetric mass transfer coefficients（KLa） of methane for modules A and B are 3.19 and 3.78 h·1,respectively,which are 3 times of that for the conventional bubble aeration.For the bubbleless aeration of air（for the case that air is bubbleless aerated）,KLa of oxygen for module B is 61.1 h·1,which is 2.6 times of that for module A and 24.8 times of that for the conventional bubble aeration.

关 键 词：甲烷 气液传质 无泡曝气 氧气 中空纤维膜 

分 类 号：TQ028.8[化学工程]