Experimental Determination of the Effect of Temperature on the Gas Transport Characteristics of Polymeric Gas Separation Fibers Based on Polysulfone

A study of the effect of temperature in a wide range (from 258.15 up to 293.15 K) on the gas transport characteristics of asymmetric polymeric gas separation fibers based on polysulfone for the components of a CO₂–N₂ binary gas mixture with various compositions is carried out. Within the framework of the work, the values of the permeability, diffusion, and solubility coefficients of pure gases in the temperature range of interest as well as the values of the permeability coefficient of the components of a CO₂–N₂ binary gas mixture are determined using gas chromatographic analysis of the permeate flow. It is demonstrated in this work that the process of separation the most effectively occurs at room temperature in the case of a low concentration of carbon dioxide (up to 15 mol %) in the binary mixture. It is experimentally shown that the separation process is the most effective at a low temperature (273.15 K) in the rest of the range of concentrations of CO₂. Further decrease in temperature does not make the process of separation of the mixture more effective throughout the entire considered range of concentrations of carbon dioxide.