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

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Carbon capture and storage (CCS) is a key technology for greatly reducing CO2 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 Li2O. The CO2 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 1100°C in CO2 atmosphere. It was experimentally confirmed that the partial pressure of CO2 equilibrated with both Ba2TiO4 and BaCO3 was higher than that equilibrated with both BaO and BaCO3. The formation of compound increased the equilibrium partial pressure of CO2 and lowered the starting temperature of CO2 desorption.
社団法人日本鉄鋼協会の論文
2010-11-15