Properties of a polyimide gas separation membrane in natural gas streams
作者： Thomas A. Blinka , Harold A. Kloczewski , I-fan Wang , Lloyd S. White
DOI: 10.1016/0376-7388(94)00313-N
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摘要: Abstract Carbon dioxide and methane permeabilities have been measured for dense film asymmetric membrane prepared from an aromatic polyimide (6FDA/DMB). Selectivities CO 2 CH 4 of up to 55 were determined mixture oof these gases. Permeability gases through the was found be dependent upon carbon higher hydrocarbon concentrations that can also present in natural gas streams. In addition having impact on permeability, presence hexane or toluene cut selectivities half. Lowered ideal test conditions are a result plasticization by components. Results contrasted with values obtained cellulose acetate films which less impacted impurities. The depends more diffusivity factors than generate high selectivity. Thermal physical properties 6FDA/DMB polymer described.
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