<abstract xmlns="http://www.w3.org/1999/xhtml">

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.
</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.

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

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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

The adsorption of CO2 on a nano-calcium oxide (nano-CaO) adsorbent was investigated under different conditions of temperature and supply pressure, considering...

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

Publié en ligne: 23 oct. 2022

Pages: 257 - 269

Reçu: 01 juil. 2022

Accepté: 03 sept. 2022

DOI: https://doi.org/10.2478/msp-2022-0024

Mots clés
nano-CaO adsorbent, CO adsorption, kinetics, isotherm, thermodynamics

© 2022 Francisco Granados-Correa et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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

Publié en ligne: 23 oct. 2022

Pages: 257 - 269

Reçu: 01 juil. 2022

Accepté: 03 sept. 2022

DOI: https://doi.org/10.2478/msp-2022-0024

Mots clésnano-CaO adsorbent, CO adsorption, kinetics, isotherm, thermodynamics

© 2022 Francisco Granados-Correa et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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

Mots clés
nano-CaO adsorbent, CO adsorption, kinetics, isotherm, thermodynamics