Репозиторий КазНИТУ

Investigation of mass transport characteristics of CO2 adsorption onto activated carbon: An experimental and numerical study

Авторы:

Assilbekov, B. (Соавтор)

Pal, A (Соавтор)

Islam, M.A (Соавтор)

Saha, B.B. (Соавтор)

Издательство:

Elsevier Ltd

Дата издания

27.09.2024

Область исследования

Инжиниринг и технологии

Тип исследования

Фундаментальное

Аннотация (краткое описание)

This study experimentally and numerically investigated CO2 adsorption characteristics onto a highly porous activated carbon. Adsorption kinetics and isotherms experiments were conducted using a high-precision thermogravimetric analyzer. The effects of key parameters, specifically adsorbent bed thickness, temperatures, and pressure, were considered. The two isotherm models were employed to correlate the measured data, and they showed a decent fit. Numerical simulations were carried out using COMSOL Multiphysics software under a coupled heat and mass transfer model. The simulated results showed a reasonable agreement with the experimental uptakes for all studied parameters. The results also showed that the diffusion time constant Ds0/Rp2 is pressure-dependent and varies with the adsorbent bed thickness. The Ds0/Rp2 at each adsorption temperature is calculated and fitted with the Arrhenius equation. Estimated averaged values of limiting Ds0/Rp2 for adsorbent bed thicknesses of 0.9, 5, and 25 mm, respectively, equal to 2.18 × 10−1, 8.64 × 10−2, and 2.05 × 10−2 1/s. Linearly increasing adsorbent bed thickness causes a rapid nonlinear drop in Ds0/Rp2. The findings from this research provide valuable information on the mass transfer characteristics of CO2 onto activated carbon. So, engineers can design optimized heating/cooling systems that operate more effectively, resulting in higher efficiency, reduced system costs, and lower carbon emissions. © 2024 The Authors

Соответствие целям устойчивого развития (ЦУР)

13.

Борьба с изменением климата

URI

https://www.scopus.com/record/display.url?eid=2-s2.0-85198290603&origin=resultslist

DOI

10.1016/j.icheatmasstransfer.2024.107779

Тип публикаций

Статья

Сведения о финансировании

The first author expresses gratitude to the Center for International Programs of the Republic of Kazakhstan for the opportunity to conduct this research under the scientific program \u201CBolashaq.\u201D The authors acknowledge the International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Japan, for providing an excellent working and research environment.

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