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Study of CO₂ permeation in Zn²⁺-modified Al₂O₃-carbonate membrane

Lookup NU author(s): Dr Evangelos Papaioannou

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2023 The American Ceramic Society. Molten carbonate-based membranes for CO2 capture have received attentions because of their high CO2 selectivity, potential energy-saving capability and environmental friendliness. Zn2+-modified Al2O3/carbonates membranes with the enhanced CO2 permeability have been developed in this work. Interfaces of LiAlO2 were formed on the surface of Al2O3 due to the carbonates incorporation. Microstructural and interfacial characterisation of the membrane revealed that the outermost LiAlO2 layer was due to the reactions between Li2CO3 and ZnAl2O4, resulting in the dissolution of ZnO in the molten carbonate. CO2 permeability of 0.5% ZnAl2O4/Al2O3/carbonates reached 9.12 × 10−12 mol.m−1s−1 Pa−1 at 700°C, higher than that of Al2O3/carbonates, because of the dissolved ZnO. With the increase of ZnAl2O4, CO2 permeability was decreased. The dissolved ZnO in the molten carbonates could enhance the ionic conductivity, whereas a higher amount of ZnO than its solubility will attenuate its effects on CO2 permeation.

Publication metadata

Author(s): Qu L, Papaioannou EI

Publication type: Article

Publication status: Published

Journal: Journal of the American Ceramic Society

Year: 2023

Volume: 106

Issue: 10

Pages: 6244-6254

Print publication date: 01/10/2023

Online publication date: 01/06/2023

Acceptance date: 18/04/2023

Date deposited: 09/07/2024

ISSN (print): 0002-7820

ISSN (electronic): 1551-2916

Publisher: John Wiley and Sons Inc

URL: https://doi.org/10.1111/jace.19216

DOI: 10.1111/jace.19216

ePrints DOI: 10.57711/byzp-yr20

Data Access Statement: All data created during this research are openly available at https://doi.org/10.25405/data.ncl.10318742

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