Thermodynamics of the CO 2 absorption in BaCeO 3 and SrCeO 3 using thermogravimetric and differential thermal analyses

Eiki Niwa, Kaori Kondo, Masatake Aoki, Ryuhei Sato, Ryo Yoshizawa, Fumito Fujishiro, Masatomo Yashima, Takuya Hashimoto

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

The reaction mechanism of AeCeO 3 (Ae: Sr, Ba) with CO 2 and its thermodynamics were investigated using scanning-type thermogravimetric/differential thermal analysis, TG-DTA, at different CO 2 partial pressures, P(CO 2 ), to estimate their potential as CO 2 absorbents. The standard Gibbs free energy change, ΔG° of SrCeO 3 +CO 2 ↔ SrCO 3 +CeO 2 and BaCeO 3 +CO 2 ↔ BaCO 3 +CeO 2 were estimated from equilibrium temperature obtained by the thermogravimetric analyses at different P(CO 2 ). From an Ellingham diagram, the standard entropy change, ΔS° and standard enthalpy change, ΔH° of each reaction were determined. The obtained ΔS° and ΔH° values of the former reaction showed fair agreement with the thermodynamic calculation, whereas those of the latter reaction showed discrepancies from those of the thermodynamic calculations. The Ellingham diagram also suggested that SrCeO 3 was superior to BaCeO 3 as a CO 2 absorbent because the temperature region of SrCeO 3 for which the absorption reaction occurred was higher than that for BaCeO 3 at constant P(CO 2 ).

本文言語英語
ページ(範囲)213-221
ページ数9
ジャーナルMaterials Research Bulletin
109
DOI
出版ステータス出版済み - 1月 2019
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「Thermodynamics of the CO 2 absorption in BaCeO 3 and SrCeO 3 using thermogravimetric and differential thermal analyses」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル