Numerical study on a structured packed adsorption bed for indoor direct air capture

S. Chen, W.K. Shi, J.Y. Yong, Y. Zhuang, Q.Y. Lin, N. Gao, X.J. Zhang and L. Jiang

Energy, 2023, vol. 282, issue C

Abstract: Direct air capture (DAC) for indoor CO2 removal can not only effectively regulate air quality but also improve the capture efficiency to a certain extent, which is a highly feasible win-win solution to decarbonization and human health. This paper proposes a W-shaped packed adsorption bed for indoor direct capture which is optimized and compared with the conventional bed. Firstly, the pressure drop of different adsorption beds is simulated by Darcy-Fochheimer law. The results demonstrate that pressure drop of the W-shaped bed performs better than the conventional adsorption bed. Then temperature swing adsorption process is investigated using an amine functionalization material. It is indicated that energy consumption of the conventional packed bed and the W-shaped packed bed are 236.2 kJ mol−1 and 167.9 kJ mol−1 for CO2 capture process, respectively. Because of the lower pressure drop of the W-shaped bed, energy consumption of fan could be greatly reduced from 88.7 kJ mol−1 to 15.1 kJ mol−1. Finally, a simple indoor CO2 concentration condition model coupled with the reactor CFD model is established to verify the performance of CO2 purification of the reactor, and it shows an excellent regulatory effect on indoor CO2. The concept can provide some valuable insights for DAC in buildings and have the potential of coupling application with various carbon capture systems.

Keywords: Direct air capture; Adsorption; Energy consumption; Building (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:282:y:2023:i:c:s0360544223021953

DOI: 10.1016/j.energy.2023.128801

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