Separation Properties for CMS Membranes

FIGURE 4.11 Permeance as a function of L-J diameterforasievingcarbon membrane. (FiomLieJ.A., Synthesis, performance andregeneration 

FIGURE 4.12 Selectivity of CO2/CH4 as a function of pressure and temperature for a CMS membrane. (From Lie J.A., Hagg M.B., Characterization of carbon membranes. Poster at The European Membrane Society s 20th Summer School, Trondheim, Norway, 2003. With permission.) 

The easily condensable CO2 molecule will follow an SSF mechanism and seriously hinder CH4 to permeate, hence high selectivities are obtained. 

---