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Comparative adsorption isotherm for Beryllium oxide/Iron (III) Oxide toward CO2 adsorption and desorption studies


Lahuri, Azizul Hakim and Yarmo, Mohd Ambar and Abu Tahari, Maratun Najiha and Tengku Azmi, Tengku Sharifah Marliza and Tengku Saharuddin, Tengku Shafazila and Lee, Mark Wun Fui and Dzakaria, Norliza (2020) Comparative adsorption isotherm for Beryllium oxide/Iron (III) Oxide toward CO2 adsorption and desorption studies. Materials Science Forum, 1010. 361 - 366. ISSN 1662-9752


Surface modification of Fe2O3 by adding BeO was synthesized and calcined at different temperatures of 200-600 °C. The adsorbents were characterized by using XRD, N2 adsorption-desorption isotherm prior to performing CO2 adsorption and desorption studies. The CO2 adsorption data were analyzed using adsorption isotherm models such as Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich. BeO/Fe2O3-300 that calcined at 300 °C showed the most efficient adsorbent with physisorption and chemisorption were measured at 5.85 and 45.88 mg/g respectively. The CO2 adsorption notably best fitted with Freundlich isotherm with R2 = 0.9897 and calculated adsorption capacity closest to experimental data. This implies the CO2 adsorption process was governed by multilayer adsorption on the heterogeneous surface of the adsorbent. The mean free energy of adsorption (E=3.536 kJ/mol) from Dubinin-Radushkevich and heat of adsorption (bT=3.219 kJ/mol) from the Temkin model support that the adsorption process is physical phenomena.

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Official URL or Download Paper: https://www.scientific.net/MSF.1010.361

Additional Metadata

Item Type: Article
Divisions: Faculty of Human Ecology
DOI Number: https://doi.org/10.4028/www.scientific.net/MSF.1010.361
Publisher: Trans Tech Publications
Keywords: Adsorption isotherm; Beryllium oxide; CO2 capture; Iron (III) oxide
Depositing User: Ms. Nuraida Ibrahim
Date Deposited: 10 Mar 2022 08:08
Last Modified: 10 Mar 2022 08:08
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.4028/www.scientific.net/MSF.1010.361
URI: http://psasir.upm.edu.my/id/eprint/88198
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