Development of solid adsorbent for carbon dioxide capture from flue gas

Abstract

The adsorption of carbon dioxide (CO2) from simulated flue gas using newly developed solid adsorbents has been studied in the present work. Adsorptive capture of CO2 from flue gas streams is a promising technology for greenhouse gas mitigation. The success of CO2 capture using solid sorbents is greatly dependent on the development of a low cost, regenerable sorbent with high CO2 adsorption capacity. Solid sorbent is expected to offer the benefits over the liquid amines used in the typical absorption process, with the added advantages that solids do not give corrosion problems like liquid amines. In the present study, alkali-impregnated meso-porous solid sorbents have been developed and their performances for CO2 capture from simulated flue gas were evaluated by using a fixed bed reactor. The effect of various process parameters like temperature, CO2 concentration and loading of active component has been studied. The adsorbent with 20wt% Na2CO3 loading have shown the best CO2 adsorption capacity among the studied adsorbents and the adsorption capacity lies in the range of 0.35–0.39mmol/g of adsorbent at a temperature of about 55°C and atmospheric pressure.