New Material Synthesis For Carbon Dioxide Capture From The Flue Gas

Abstract

Carbon dioxide generated from fossil fuel- red power plants is a major contributor to global warming approximately 30% of gaseous CO2 emitted to the atmosphere comes from the fossil fuel plants. Among the approaches used, amine based chemical absorption have been used commercially for CO2 capturing plant. However, the liquid amine based processes pose operating di culties due to the challenge of keeping the solvent clean and operating within the process constraints of the system. This process also su ers from high regeneration energy, large equipment size, solvent leakage from piping system and also equipment corrosion problem. regenerable solid sorbents will be a promising alternative that can potentially o er several advantages over liquid amine systems such as ease in handling of solids, reduced toxicity and corrosiveness. Various porous supports impregnated with liquid amines have been reported. The key issue for adsorption separation is to develop an adsorbent with high CO2 adsorption capacity and high CO2 selectivity which will be the main objectives of this study. The purpose of this research is to develop a simple, cost e ective technology to remove CO2 as an essentially pure stream from ue gas using a regenerable amine-based sorbent. There are di erent technologies like membrane separation, cryogenic separation, absorption by liquid amines and various solid adsorbents used to functionalize for CO2 capture by means of physical and chemical adsorption. In this research project we mainly focus on the solid adsorbents like MCM-22, Alumina and SBA-15 which will be functionalized by di erent amines like Tetraethylpentamine and Polyethylenimine for carbon dioxide capture capacity.The results shows that as the concentration of amines increased the surface area and pore volume decreases. Amongst all the samples 50% TEPA functionalized SBA-15 shows the maximum CO2 adsorption Capacity i.e. 2.4 mmol/g. All the sorbents prepared for this work are regenerable at 130oC The adsorption capacities showed good correlation with well-ordered porous structure, amine loading and type of amine.