We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
CO<sub>2</sub> adsorption behavior of a highly-microporous KOH-activated carbon obtained from rice husk waste: kinetic and equilibrium studies.
- Authors
Granados-Correa, Francisco; Gutiérrez-Bonılla, Elvira; Jiménez-Reyes, Melania; Roa-Morales, Gabriela; Balderas-Hernández, Patricia
- Abstract
In this study, rice husk was the precursor for a KOH-activated carbon with high surface area and high micro-porosity. CO2 adsorption capacity of this material was measured by thermogravimetric analysis. The CO2 adsorption kinetic showed that equilibrium was reached 30 min after the solid-gas phases came into contact and is well-described by the pseudo-first order model (R2 > 0.99 and 95 % confidence level). Intraparticle diffusion model revealed multilinearity over the CO2 adsorption range. Isotherm data at 25, 35, and 45 °C were well-fitted by the Freundlich model, revealing the adsorbent's surface heterogeneity and the exothermic behavior of the process. The material reached a maximum CO2 adsorption capacity of 2.54 mmol/g. A comparison with literature data showed a good agreement.
- Subjects
RICE hulls; ADSORPTION (Chemistry); ADSORPTION capacity; EQUILIBRIUM; ADSORPTION kinetics
- Publication
International Journal of Chemical Reactor Engineering, 2024, Vol 22, Issue 2, p181
- ISSN
1542-6580
- Publication type
Article
- DOI
10.1515/ijcre-2023-0052