Predicted binary isotherms of CO2/N2 gas mixture for post-combustion capture and direct air capture using gallate-based metal-organic frameworks
MARHAINA Ismail, NIK ABDUL AZEEM Nik Saleduddin, MOHAMAD AZMI Bustam
Abstract. Post-combustion capture and direct air capture are two important processes for reducing CO2 content in the atmosphere and mitigating climate change. Post-combustion capture involves capturing CO2 emissions produced from power plants, while direct air capture removes CO2 directly from the ambient air. Gallate-based MOFs can offer remarkable CO2 adsorption capacity. However, there is scarcity of reported works related to N2 adsorption, limiting the scope of research on binary isotherms of CO2/N2 mixture. Therefore, this work aims to investigate the adsorption of pure N2 gas using gallate-based MOFs. Additionally, prediction of binary isotherms of CO2/N2 mixtures was carried out to assess the efficiency of these frameworks for post-combustion capture and direct air capture. The predicted binary isotherms of CO2/N2 mixture revealed that gallate- based MOFs hold potential as adsorbents for both post-combustion capture and direct air capture. The IAST selectivity illustrated that gallate-based MOFs possess the capability to selectively capture CO2 from CO2/N2 mixture, with Mg-gallate exhibiting the highest values, followed by Ni- gallate and Co-gallate. Therefore, Mg-gallate, Co-gallate and Ni-gallate can be suggested as promising adsorbents for post-combustion capture and direct air capture.
Keywords
IAST, Binary Isotherm, Post-Combustion, Direct Air Capture
Published online 4/25/2025, 10 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: MARHAINA Ismail, NIK ABDUL AZEEM Nik Saleduddin, MOHAMAD AZMI Bustam, Predicted binary isotherms of CO2/N2 gas mixture for post-combustion capture and direct air capture using gallate-based metal-organic frameworks, Materials Research Proceedings, Vol. 53, pp 423-432, 2025
DOI: https://doi.org/10.21741/9781644903575-43
The article was published as article 43 of the book Decarbonization Technology
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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