Report study on CO2/CH4 Separation using Cellulose Acetate membrane .

Date : Aug 2015 - Dec 2015

Natural gas is Homogenous Liquid of low viscosity and low density. It may also be defined as a complex mixture of combustible hydrocarbon gases and impurities. Common impurities in the Natural gas streams include Carbon dioxide, water vapour, hydrogen sulphide and nitrogen. These impurities are corrosive, and hydrogen sulphide is also toxic, hence removal of the Contaminants is necessary to meet pipeline requirements. The pipeline specifications for these Impurities are: 2 % for CO2, 4 ppm for H2S, and 0.1 g/m3 for H2O. The removal of these Contaminants also increase the heating value of the transported gas. Currently, the only commercially viable Membranes used for CO2 removal are polymer based, for example, cellulose acetate (CA), Polyimides, polyamides, PolySulfone (PSF), Polycarbonates. The OGDCL QADIRPUR working on the most widely used and tested material cellulose acetate as Used in UOP’s membrane systems.CA membranes are relatively inexpensive as compared to PSF membranes. One limitation of cellulose acetate, which is widely known to plasticize in the presence of CO2, plasticize can Cause CO2 selectivity of CA membrane Decrease. That alternatively reduce the membrane area required for removing CO2.PolySulfones are important commercial membrane material for gas separation due to their excellent mechanical properties, a beamy operating temperature range, fairy good chemical resistance, and easy fabrication of membranes in a beamy variety of configurations and modules