Thermodynamic Consideration on the Absorption Properties of Carbon Dioxide to Basic Oxide

Carbon capture and storage (CCS) is a key technology for greatly reducing CO, emissions in the long term, and therefore a low-energy CCS process needs to be developed. This study focused on the solid absorption process using basic oxide, and thermodynamically examined the carbonation abilities of various basic oxides and compounds containing CaO, BaO or Li(2)O. The CO(2) absorption and desorption behavior of these materials containing alkali earth metal oxides was investigated by measuring the weight change over a wide range of temperatures from room temperature to 1 100 degrees C in CO(2) atmosphere. It was experimentally confirmed that the partial pressure of CO(2) equilibrated with both Ba(2)TiO(4) and BaCO(3) was higher than that equilibrated with both BaO and BaCO(3). The formation of compound increased the equilibrium partial pressure of CO(2) and lowered the starting temperature of CO(2) desorption.