Issue |
E3S Web Conf.
Volume 580, 2024
2024 2nd International Conference on Clean Energy and Low Carbon Technologies (CELCT 2024)
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Article Number | 02005 | |
Number of page(s) | 6 | |
Section | Low Carbon and Energy Saving Technologies and Environmental Sustainability | |
DOI | https://doi.org/10.1051/e3sconf/202458002005 | |
Published online | 23 October 2024 |
Utilizing ZrO2 as an Alkali Metal-Based Adsorbent Support to Lower Energy Consumption in Direct Air Capture
1 School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China
2 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China
* Corresponding author: xpchen@seu.edu.cn
Alkali metal-based adsorbents are used in the direct air capture of CO2, but the process is hindered by high energy demands, mainly due to the slow adsorption and desorption kinetics of CO2, This necessitates the use of a catalytic support like ZrO2 to reduce the energy barrier associated with the reaction. This study uses both density functional theory and experimental approaches to explore how ZrO2 support interacts with H2O during the carbonation reaction. The findings suggest that the presence of [ZrO(OH)]+ and OH- on the monoclinic ZrO2 (001) surface greatly speeds up the dissociation of H2O, reducing energy use in CO2 capture and increasing thermal efficiency. The catalytic role of ZrO2 is further confirmed through analyses using thermogravimetric-mass spectrometry (TG-MS) and X-ray photoelectron spectroscopy (XPS).
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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