Evaluation and screening of adsorbents for the separation of carbon dioxide from natural gas

Abstract

Replacing coal with natural gas is one of the feasible approaches to mitigate CO2 emission at present. To satisfy the increasing global demand for natural gas, more research and development efforts are being put in converting the highly sour natural gas into applicable energy sources. Adsorption processes offer a promising method to remove the bulk sour component, CO2, from high pressure sour natural gas. Adsorptive properties of six zeolites and one silica gel (CBV-760, CBV-780, HSZ-320HOA, HSZ-350HUA, HSZ-385HUA, HSZ-390HUA, and Sorbead WS) were characterised by various methods. Their adsorption isotherms of CO2 and CH4 in the low-pressure regime (0 – 10 bar) were used to determine the iso..