The chemical stability of SrFeO 3 ‐based perovskites in H 2 O‐ and CO 2 ‐containing atmospheres at high temperatures and pressures has been examined. The extent of reaction as a function of p CO 2 , p H 2 O, temperature, and time has been determined. Either strontium carbonate or Sr(OH) 2 ·H 2 O was observed on sample surfaces after exposure. Observation of two different reaction‐rate behaviors could be explained by the formation of different products. The stability of the perovskite has been found to increase when the activity of Sr is decreased. Chemical stability in H 2 O/CO 2 is important to understand in order to use these membrane materials for syngas production.
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Kaus et al. (2007) studied this question.
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