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Boosting the CO₂ permeability in a supported molten-carbonate membrane by tuning the ratio between the ionic and electronic conducting phases

Lookup NU author(s): Dr Evangelos PapaioannouORCiD

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Abstract

© 2025 Elsevier Ltd. High-temperature supported molten-carbonate membranes hold significant promise for selective CO2 capture and utilization from fossil fuel combustion owing to their structural simplicity and cost-competitive operation as opposed to traditional solvent processes. High CO2 capture rates, that can be quantitatively represented by the membrane's permeability, are routinely expected to be dictated by the CO2 driving force or the composition of the molten phase. Here, however, we demonstrate that in a supported molten-salt membrane fabricated using mixed ionic and electronic conducting oxides as the membrane material, the phase ratio between those phases can also control CO2 permeability. We demonstrate this by using different ratios of Al-CeO2 (ionic phase) and Al-ZnO (electronic phase) for the membrane material and operate under fixed CO2 partial pressure driving force to show that higher ionic:electronic phase ratios lead to higher CO2 permeabilities.

Publication metadata

Author(s): Qu L, Papaioannou EI

Publication type: Article

Publication status: Published

Journal: Journal of the European Ceramic Society

Year: 2025

Volume: 45

Issue: 13

Print publication date: 01/10/2025

Online publication date: 08/05/2025

Acceptance date: 07/05/2025

ISSN (print): 0955-2219

ISSN (electronic): 1873-619X

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.jeurceramsoc.2025.117522

DOI: 10.1016/j.jeurceramsoc.2025.117522

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