Surface Remodelling of Zeolite 4A Bodies for CO2 Capture: A Case Study

Abstract

The effect of both physical and chemical modification of zeolite 4A bodies on CO 2 adsorption characteristics was critically investigated. The physical modification was done by milling using planetary ball mill and chemical modification was done by amine impregnation technique. The surface area decreased by 53% after milling which leads to 28% drop in CO 2 adsorption capacity in Zeo-12 (milled zeolite 4A bodies). Whereas, after the chemical modification via isopropylamine impreg-nation on Zeo-00 (un-milled zeolite 4A bodies) and Zeo-12, there was an increase in CO 2 adsorption capacity by 10.45% and 46.23%, respectively. Further, Henry constant was calculated from CO 2 adsorption isotherm data which was enhanced by 2.92% and 130.79% in Zeo-00 and Zeo-12-IPA, respectively. Such significant augmentation in adsorption capacity and Henry constant indicated that the chemical modification via amine impregnation is an efficient route for bulk CO 2 adsorption as compared to physical modification.