ABSTRACT
This chapter introduces membranes used for CO2 removal. In contrast to the polymeric membranes, zeolite membranes are physically and chemically more stable and they keep the initial structure and do not swell and inflame in contact with contaminated species. The solution-diffusion model is suggested to describe the permeation of various gases into the dense polymeric membranes. The importance of this model is that the transport phenomena across a polymeric film can be explained. According to the theory of solution-diffusion model, two gas components in a binary gas mixture are in a competition for passing through the polymeric membrane. Another polymeric membrane is cellulose acetate (CA) that draws attention of researchers and scientists in reverse osmosis, ultrafiltration, and gas separation field because of unique properties. The product is highly hydrophobic, flexible, and also has very high flux. Similar to the polymeric membranes, the ceramic membranes are also classified into porous and nonporous types.
