Study of Cao Sorbent for CO2 Capture from Flue Gases

This study focuses on the CO(2) sorption from a synthetic gas mixture (3% CO(2)-97% N(2)) by the carbonation reaction of CaO. Experiments are carried out in a U-tube fixed bed at high temperature. The experiments are designed on the base of CO(2) adsorption dependency on the bed temperature and gas flow rate in the carbonation reaction. The CO(2) concentration profile at the outlet of The bed, is recorded by the calibrated CO(2) gas sensor (solid electrolyte type). In addition, the conversion of CaO to CaCo(3) is obtained in according to the bed temperature and after that, the results are applied in a proposed model. Base on this model, carbonation reaction in the fixed bed predict by the fast chemical reaction control regime. The activation energy is estimated to about 65.84, KJ/mol that it is in agreement with the other values found in the previous work for the chemical reaction control regime.