Graphene-based membranes for CO2 separation

Abstract

Increasing concentration of carbon dioxide (CO2) in the atmosphere is responsible for global warming in the world. Up to date, many technologies have been investigated to reduce the concentration of CO2 in the environment but no technology has got significant successes yet. Recently graphene based membrane has attracted increasing attention for their potential applications in gas separation. In this review, we focus on separation of CO2 from gas mixtures through graphene-based membranes. More specifically, the separation of gas mixtures such as CO2/H2, CO2/CH4, CO2/N2 and CO2/O2 which have similar compositions in flue gas treatment, hydrogen purification and natural gas purification will be discussed. The advantages and disadvantages of these membranes will also be part of discussion and finally, the review ends with several recommendations and suggestions on the future prospect for CO2 separation. Keywords: Carbon dioxide, Global warming, Graphene, Membrane, Separation, Purification