Have a personal or library account? Click to login
Evaluation of CO2 adsorption capacity with a nano-CaO synthesized by chemical combustion/ball milling Cover

Evaluation of CO2 adsorption capacity with a nano-CaO synthesized by chemical combustion/ball milling

Open Access
|Oct 2022

Abstract

The adsorption of CO2 on a nano-calcium oxide (nano-CaO) adsorbent was investigated under different conditions of temperature and supply pressure, considering kinetic, isotherm, and thermodynamic parameters. CaO is a crystalline material with a high surface area and nanosized particles with high porosity, which showed rapid initial CO2 adsorption rates in the moderate temperature range studied. The adsorption was well described by the pseudo-second-order and the intraparticle diffusion kinetic models. The Langmuir isotherm model fitted the experimental data well, indicating a monolayer-type process. The thermodynamic parameters revealed that the CO2/nano-CaO adsorption was endothermic, not spontaneous, and proceeded via physical and chemical processes. The activation energy value confirmed that the mechanism involved is a chemical process. In addition, the nano-CaO adsorbent could be regenerated five times without any significant loss of performance or properties. All the obtained results reveal that this porous nanoadsorbent has huge potential to be applied for CO2-capture technologies on a large scale.

DOI: https://doi.org/10.2478/msp-2022-0024 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
Language: English
Page range: 257 - 269
Submitted on: Jul 1, 2022
|
Accepted on: Sep 3, 2022
|
Published on: Oct 23, 2022
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2022 Francisco Granados-Correa, Melania Jiménez-Reyes, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.