CO2 Adsorption on Activated Carbon Honeycomb-Monoliths: A Comparison of Langmuir and Tóth Models

International Journal of Molecular Sciences

Diana P. Vargas¹  Liliana Giraldo¹ 

[1]Department of Chemistry, Faculty of Sciences, National University of Colombia, Avenida Carrera 30 No. 45-03, Bogotá, Colombia

[2] E-Mails:

关键词: activated carbon;    carbon monolith;    chemical activation;    CO₂ adsorption;    Langmuir;    Tóth;   

DOI  :  10.3390/ijms13078388

来源: mdpi

【 摘 要 】

Activated carbon honeycomb-monoliths with different textural properties were prepared by chemical activation of African palm shells with H₃PO₄, ZnCl₂ and CaCl₂ aqueous solutions of various concentrations. The adsorbents obtained were characterized by N₂ adsorption at 77 K, and their carbon dioxide adsorption capacities were measured at 273 K and 1 Bar in volumetric adsorption equipment. The experimental adsorption isotherms were fitted to Langmuir and Tóth models, and a better fit was observed to Tóth equation with a correlation coefficient of 0.999. The maximum experimental values for adsorption capacity at the highest pressure (2.627–5.756 mmol·g⁻¹) are between the calculated data in the two models.

【 授权许可】

CC BY   
© 2012 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.