CO2/CH4 Mixed Gas Separation Using Carbon Hollow Fiber Membranes

Abstract

In this study, the permeation properties of single and binary CO2/CH4 mixture were investigated using a module of carbon hollow fiber membranes derived from sulfonated poly(phenylene oxide) (SPPO). SPPO carbon membrane module had a sharp pore-size distribution in the range of 0.35-0.4 nm, and showed high CO2/CH4 ideal selectivity for both single and binary gas separation. The effects of permeation temperature, total feed pressure and CO2 concentration in the feed on separation performances of the carbon membrane module were also investigated. It was found that the CO2/CH4 ideal selectivity decreased slightly with the increasing permeation temperature, total feed pressure, and CO2 concentration in the feed.