Carbon molecular sieve films from polyimide

Separation of CO2/CH4 through carbon molecular sieve membranes derived from P84 polyimide

“…The detailed calculation and concept involved are reported elsewhere [33]. Further to the Matrimid-based CMSMs, the preparation and characteristics of carbon membranes derived from Kapton are reported by Feurtes et al [16], Suda and coworkers [37,38] and Hatori and coworkers [14,39]. However, we are unable to compare the permeation results of P84-derived CMSMs in this study with the separation performance of Kapton-derived CMSMs, as the separation of CO 2 /CH 4 was not being investigated in their works.…”

Membrane technologies for CO2 separation

“…They are obtained through the pyrolysis (at high temperature in an inert atmosphere) of polymeric precursors already processed in the form of membranes. In the literature many studies refer on the preparation of carbon membranes from both rubbery and glassy polymers [45][46][47][48][49][50][51], however, currently, Polyimide is the most used precursor [52][53][54][55][56]. Carbon membranes combine improved gas transport properties for light gases (gases of molecular size smaller than 4.0-4.5 Å) with thermal and chemical stability.…”

Permeation Behavior of Gas Molecules in Ultramicropore of Molecular Sieving Carbon Membranes

“…Inorganic membranes made of zeolite [1,2], • silica [3][4][5] or carbon [6][7][8][9][10][11][12], which have been actively studied in last decade, are considered for the separation process at high temperatures since they have high thermal-and corrosion-resistance and their properties of gas separation are quite different from those of polymer membranes. The characteristic properties of the inorganic membranes are attributable to the very narrow pore channels in sub-nanometer scale, in which interaction between the solid surface and gas molecules determines the separation ability.…”

“…The characteristic properties of the inorganic membranes are attributable to the very narrow pore channels in sub-nanometer scale, in which interaction between the solid surface and gas molecules determines the separation ability. We have reported the control of size distribution of ultramicropores (micropores less than 0.5nm in diameter) and the gas permeability in molecular sieving carbon membranes (MSCMs) that are easily prepared from polyimide by simple heat-treatment in inert atmosphere [6,13]. The membranes which have ultramicropores with the size of about 4-5 nm show a high selectivity on C0 2 permeation.…”