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

Research output: Contribution to journalArticlepeer-review

Abstract

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 ).

Original languageEnglish
Pages (from-to)213-221
Number of pages9
JournalMaterials Research Bulletin
Volume109
DOIs
Publication statusPublished - Jan 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Thermodynamics of the CO <sub>2</sub> absorption in BaCeO <sub>3</sub> and SrCeO <sub>3</sub> using thermogravimetric and differential thermal analyses'. Together they form a unique fingerprint.

Cite this