The most Important Polymeric Membranes in Gas-liquid Hollow Fiber Membrane Contactors Technology for Acidic Gases Removal: a Review

An overview of the literature from 1975 up to now on hollow fiber membrane contactors for gas-liquid systems and common polymeric membranes, applied in this technology, has beenpresented. Glass transition temperature of polymers is usually determined based on their chemical structures, including chain flexibility and chain reactions. Generally, the factors which cause Tg, Tm or crystallinity of the membranes to be increased, improve their thermal and chemical stabilities. The most important parameters of membrane contactors for acid gases removal, CO2 and H2S, including hydrophilicity and hydrophobicity of the absorbent materials in the membranes, and various models, presented in the literature, have also been presented. In addition, advantages and disadvantages of gas-liquid contactor membranes in acidic gases separation have been studied and the technology has been compared to the traditional methods of separation. Current status and future directions of the technology have been shown and some approaches for future research have been recommended to commercialize this technology.