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Volume 11
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10.3390/separations11060160
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Article

Evaluation of CO2/H2O Co-Adsorption Models for the Anion Exchange Resin Lewatit VPOC 1065 under Direct Air Capture Conditions Using a Novel Lab Setup

by
Florian M. Chimani
*,
Aditya Anil Bhandari
,
Andreas Wallmüller
,
Gerhard Schöny
,
Stefan Müller
and
Josef Fuchs
Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Getreidemarkt 9/166, 1060 Wien, Austria
*
Author to whom correspondence should be addressed.
Separations 2024, 11(6), 160; https://doi.org/10.3390/separations11060160
Submission received: 29 April 2024 / Revised: 17 May 2024 / Accepted: 20 May 2024 / Published: 22 May 2024
(This article belongs to the Topic Carbon Capture Science & Technology (CCST))
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Abstract

This study aimed to develop a laboratory-scale direct air capture unit for evaluating and comparing amine-based adsorbents under temperature vacuum swing adsorption conditions. The experimental campaign conducted with the direct air capture unit allowed for the determination of equilibrium loading, CO2 uptake capacity, and other main performance parameters of the investigated adsorbent Lewatit VP OC 1065®. The investigations also helped to understand the co-adsorption of CO2 and H2O on the tested material, which is crucial for improving temperature vacuum swing adsorption processes. This was achieved by obtaining pure component isotherms for CO2 and H2O and using three different co-adsorption isotherm models from the literature. It was found that the weighted average dual-site Toth model emerged as the most accurate and reliable model for simulating this co-adsorption behaviour. Its predictions closely align with the experimental data, particularly in capturing the adsorption equilibrium at various temperatures. It was also observed that this lab-scale unit offers advantages over thermogravimetric analysis when conducting adsorption experiments on the chosen amine. The final aim of this study is to provide a pathway to develop devices for testing and developing efficient and cost-effective adsorbents for direct air capture.
Keywords: direct air capture; CO2 adsorption; co-adsorption; isotherm modelling; negative emissions technology direct air capture; CO2 adsorption; co-adsorption; isotherm modelling; negative emissions technology

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MDPI and ACS Style

Chimani, F.M.; Bhandari, A.A.; Wallmüller, A.; Schöny, G.; Müller, S.; Fuchs, J. Evaluation of CO2/H2O Co-Adsorption Models for the Anion Exchange Resin Lewatit VPOC 1065 under Direct Air Capture Conditions Using a Novel Lab Setup. Separations 2024, 11, 160. https://doi.org/10.3390/separations11060160

AMA Style

Chimani FM, Bhandari AA, Wallmüller A, Schöny G, Müller S, Fuchs J. Evaluation of CO2/H2O Co-Adsorption Models for the Anion Exchange Resin Lewatit VPOC 1065 under Direct Air Capture Conditions Using a Novel Lab Setup. Separations. 2024; 11(6):160. https://doi.org/10.3390/separations11060160

Chicago/Turabian Style

Chimani, Florian M., Aditya Anil Bhandari, Andreas Wallmüller, Gerhard Schöny, Stefan Müller, and Josef Fuchs. 2024. "Evaluation of CO2/H2O Co-Adsorption Models for the Anion Exchange Resin Lewatit VPOC 1065 under Direct Air Capture Conditions Using a Novel Lab Setup" Separations 11, no. 6: 160. https://doi.org/10.3390/separations11060160

APA Style

Chimani, F. M., Bhandari, A. A., Wallmüller, A., Schöny, G., Müller, S., & Fuchs, J. (2024). Evaluation of CO2/H2O Co-Adsorption Models for the Anion Exchange Resin Lewatit VPOC 1065 under Direct Air Capture Conditions Using a Novel Lab Setup. Separations, 11(6), 160. https://doi.org/10.3390/separations11060160

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