中空纤维膜组件分离酸性气体

Absorption of Sulfur Dioxide Using Hollow Fiber Membrane Modules

研究了气体膜分离与溶剂吸收相结合的分离技术．以NaOH水溶液为吸收剂，在中空纤维膜组件中实现二氧化硫气体的选择性吸收．研究了在三种不同结构的疏水性聚丙烯中空纤维膜组件中，吸收剂浓度、液速、气速、气液两相在膜组件内的流程、膜结构等对分离过程的影响；根据膜结构的实际参数确定了多孔膜的曲率因子，总传质系数的计算值与实验值相符．

An experimental investigation of combining absorption and membrane gas separation process in a microporous hydrophobic hollow fiber module was carried out. The absorbentwas the aqueous solution of NaOH. Three microporous hollow fiber modules were used to determine the overall mass transfer coefficient and absorption rate in the SO2-NaOH absorptionsystem under various operation conditions. The overall mass transfer coefficient calculated wasin good agreement with the experimental data. The tortuosity factor of membrane may beestimeted by the structural parameters of membrane.