ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Comparative study of adsorption isotherms on activated carbons synthesized from rice husk towards carbon dioxide adsorption

Kishor Palle, Shanthi Vunguturi, K. Subba Rao, Sambhani Naga Gayatri, P. Ramesh Babu, Md. Mustaq Ali, and Ramesh Kola

Department of Chemistry, Muffakham Jah College of Engineering and Technology, Hyderabad, India

E-mail: drkishorepalle@gmail.com

Received: 16 June 2022  Accepted: 11 July 2022

Abstract:

Rice husk was chemically activated with saturated KOH solution and the activation temperature was varied from 400 to 700 °C to generate activated carbons with different textural characteristics. Activated carbons were investigated for their ability to adsorb CO₂. We selected Langmuir, Freundlich, Sips and Radke-Prausnitz equations to fit the experimental CO₂ adsorption data. In order to determine the effect of using different error standards when calculating isotherm model parameters, an error analysis was conducted. The Radke-Prausnitz model shows the best fit to CO₂ adsorption and calculated adsorption capacity correlates closely with experimental data.

Keywords: Rice husk; Activated carbon; Adsorption models; Error analysis; CO2 adsorption

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02371-1

Chemical Papers 76 (12) 7525–7534 (2022)