Modeling CO2 Adsorption in a thin discrete packing

Wray, MIchael and Amrouche, Farida and Aiouache, Farid (2024) Modeling CO2 Adsorption in a thin discrete packing. Industrial and Engineering Chemistry Research, 63 (16). pp. 7321-7334. ISSN 1520-5045

Text (Manuscript_v_1_clean)
Manuscript_v_1_clean.pdf - Accepted Version
Available under License Creative Commons Attribution.
Download (1MB)

Abstract

Local dynamics of CO2 adsorption in a discrete packing contained in a thin tube was assessed by 3D modeling. Thin tube packed bed adsorbers are currently used over tube structures in thermochemical energy storage systems and atmospheric revitalization of confined spaces. Driven by the interplay between key factors such as the exothermicity and the fluid flow, the advective transport was found less effective than the diffusive one on the breakthrough trends of CO2 which displayed significant concentration gradients at both inter- and intraparticle scales. The lack of angular symmetry inside the particles by the reduction in resistance to mass transfer in the area of solid particles exposed to high velocities led to greater convective transports from the bulk of the gaseous phase to the pores. The result of the modeling agreed with the experimental data obtained at the exit of the adsorber, helping reduction in reliance on the empirical dispersion models used in the one-dimensional modeling.