Support Layer for Composite Gas Separation Membranes toSeparate Nitrogen from Light Hydrocarbons: Fabrication andInvestigation

This study looked at the production of the support layer that is utilized in composite membranes toseparate nitrogen gas from light hydrocarbons such as methane gas. A constant pressure membranepermeation setup was used to evaluate the performance of the produced layer. In composite membranes,with a smooth surface of the support layer and by reducing its roughness, it is possible to coat theseparating layer with the minimum possible thickness. AFM testing took place on the manufacturedmembranes for this reason. Viscosity was measured as a determining factor in the non-penetration ofthe support layer solution beneath the non-woven polyester fabric. At room temperature (۲۵°C), thepolymeric solution, with a viscosity of ۳ Pa.s, did not penetrate under the non-woven fabric when driedat ambient temperature . Eventually, it was shown that the created support layer can be utilized at lowpressures to create composite membranes for gas separation with high permeance.