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CO2 Separation using Modified MCM-41 in PSA

Author(s): Alias N.H. | Kamaruddin K. S. N. | Bhatti I.

Journal: International Journal of Chemical and Environmental Engineering
ISSN 2078-0737

Volume: 1;
Issue: 2;
Start page: 85;
Date: 2010;
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Keywords: Carbon dioxide | Adsorption | Pressure swing adsorption | Aminated MCM-41

Prevention of excessive amounts of CO2 is one of the main serious environmental problems facing humanity, due to its significantimpact on climate change. Today, CO2 from natural gas is normally separated with alkanoamines in aqueous solution. Nevertheless, thisliquid amine based processes pose operating difficulties due to equipments corrosion, solvent leakage, large equipment size and highregeneration energy. Adsorption is recognized as an economically attractive and proficient separation method toward substitutingconventional CO2 separation processes as it is predicted to offer low requirements of energy for porous adsorbent regeneration while ableto combine high productivity and selectivity. In this study, mesoporous material MCM-41 was synthesized and modified usingmonoethanolamine, MEA directly to the surface of the solid sorbents. The MCM-41 structures and physical properties werecharacterized using powder X-Ray Diffraction (XRD), BET surface analysis on nitrogen adsorption at 77K and thermogravimetricanalysis. CO2 adsorption and desorption measurement were determined using of Pressure Swing Adsorption (PSA) system. It was foundthat incorporation of MEA into MCM-41 showed better result compared to unmodified MCM-41 in term of improvement in physical andchemical properties, high CO2 adsorption capacity and modified adsorbents were ease of regeneration.
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