Removing of light hydrocarbons from gas mixtures using polymeric composite membranes based on poly(1-trimethylsilylpropyne)

In the present work the permeability and separation and properties of homogeneous polymeric films and composite polymeric membranes based on PTMSP for removing hydrocarbons from gas mixtures were studied. The dependence of permeability for single N2, CH4, n-C4H10 on feed pressure was obtained. The behavior of permeability and selectivity at decreasing partial pressure of n-C4H10/He and n-C4H10/CH4 mixtures were investigated. The obtained high level of n-C4H10/CH4 mixture selectivity at significant increase of n-C4H10 permeability in the range of low partial pressure of n-butane allows to apply the presented membranes in such processes as separation of nature gas and fuel gas components particularly in combination with such separation processes as absorption and condensation [1].