CO<sub>2</sub> adsorption behavior of a highly-microporous KOH-activated carbon obtained from rice husk waste: kinetic and equilibrium studies-Reference-Cited by-同舟云学术

CO₂ adsorption behavior of a highly-microporous KOH-activated carbon obtained from rice husk waste: kinetic and equilibrium studies

Published:2023-12-04 Issue:0 Volume:0 Page:
ISSN:1542-6580
Container-title:International Journal of Chemical Reactor Engineering
language:en
Short-container-title:

Author:

Granados-Correa Francisco¹^ORCID,Gutiérrez-Bonılla Elvira¹²,Jiménez-Reyes Melania¹,Roa-Morales Gabriela²,Balderas-Hernández Patricia²

Affiliation:

1. Departmento de Química , Instituto Nacional de Investigaciones Nucleares , Carretera México-Toluca S/N, La Marquesa , C. P. 52750 Ocoyoacac , Estado de México , Mexico

2. Facultad de Química , Universidad Autónoma del Estado de México , Toluca , Estado de México , Mexico

Abstract

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 (R 2 > 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.

Publisher

Walter de Gruyter GmbH

Subject

General Chemical Engineering

Link

https://www.degruyter.com/document/doi/10.1515/ijcre-2023-0052/pdf

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