Capture of CO2 by vermiculite impregnated with CaO

Vermiculite samples were impregnated with different amounts of calcium oxide by the conventional thermal heating technique and subject to CO 2 capture experiments in thermal analysis equipment. The amount of CO 2 captured by calcium oxide increased from 13 g of CO 2 per mol of CaO to 16.8 g of CO 2 per mol of CaO when the experiments were carried out with pure calcium oxide and vermiculite impregnated with CaO (1:1), respectively. Integral isoconversional methods of Kissinger-Akahira-Sunose (KAS) and Osawa-Flynn-Wall (OFW) were used for the kinetic study of the process and good correlation coefficients were achieved. The apparent activation energy values showed that for low conversions (α 40 kJ).