Carbon dioxide decomposition through gas exchange in barium calcium iron niobates

Harriet Kildahl, Zhongbo Li, Hui Cao, Peter Slater, Yulong Ding

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

A number of metal oxides and perovskites are capable of being reduced at high temperatures and then re-oxidised in the presence of CO2 or H2O to form CO or H2. Barium calcium iron niobates have been found to be redox-active in this way. The redox activity of these perovskites was explored, and the chemical and physical stability was investigated using EDX and SEM imaging, respectively. The most promising, Ba2Ca0.66Nb0.34FeO6-δ (BCNF1), showed mass changes of 0.45 % after five cycles of reduction with N2 and re-oxidation with 10 % CO2. BCNF1 is chemically stable as it shows no changes in XRD and shows no evidence of sintering, although cracking of the pellets was observed after re-oxidation. The low enthalpy of re-oxidation of BCNF1 coupled with the high and sustained mass change makes this perovskite suitable for chemical looping use for energy storage and conversion systems.
Original languageEnglish
Pages (from-to)211-219
Number of pages9
JournalCatalysis Today
Volume364
Early online date11 May 2020
DOIs
Publication statusPublished - 15 Mar 2021
Externally publishedYes
Event14th International Conference on Catalysis in Membrane Reactors - Eindhoven, Netherlands
Duration: 8 Jul 201911 Jul 2019
Conference number: 14
https://www.aanmelder.nl/99737

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