Ultra-thin MFI membranes with different Si/Al ratios for CO2/CH4 separation

Ultra-thin MFI zeolite membranes with different Si/Al ratios (152, 47 and 26) were prepared on graded αalumina supports in the presence of organic template molecules and evaluated for separation of equimolar CO2/ CH4 mixtures at temperatures from 315 to 249 K.