主催: 日本エネルギー学会 石炭科学部会, 日本エネルギー学会 コークス工学研究部会
共催: 日本学術振興会 石炭・炭素資源利用技術第148委員会, 化学工学会 エネルギー部会, 日本エネルギー学会 重質油部会, 日本エネルギー学会 ガス化部会, 日本エネルギー学会 燃焼部会
会議名: 第53回石炭科学会議
回次: 53
開催地: 福山市生涯学習プラザ（広島県福山市）
開催日: 2016/10/26 - 2016/10/27
In the regenerator of Calcium-Looping CO2 capture process, CaCO3 is thermally decomposed to CaO under high CO2 partial pressure conditions at high temperatures about 1223 K. It is known that the decomposition of CaCO3 is enhanced by H2O vapor. A possible mechanism is that CO2 in the gas phase adsorbs on CaO surface and inhibit desorption of CO2 which is formed by the decomposition reaction, but the CO2 adsorption is inhibited by H2O vapor. In the present work, change in weight of CaO was measured by TGA, feeding gas containing CO2 and H2O. By feeding solely CO2 or H2O, the adsorption of each component was found to be described by Langmuir-type isotherm. The inhibition of CO2 adsorption by H2O, however, was more pronounced than the estimated inhibition assuming competitive adsorption.
