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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received January 18, 2006
Accepted March 2, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Preparation of powdered activated carbon from rice husk and its methane adsorption properties

Marriyappan Sivagnanam Balathanigaimani Hyun-Chul Kang Wang-Geun Shim Chan Kim Jae-Wook Lee¹ Hee Moon^†

Faculty of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, Korea ¹Department of Environmental and Chemical Engineering, Seonam University, Namwon 590-170, Korea

hmoon@chonnam.ac.kr

Korean Journal of Chemical Engineering, July 2006, 23(4), 663-668(6), 10.1007/BF02706811

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Abstract

Success of adsorbed natural gas (ANG) storage process is mainly based on the characteristics of the adsorbent, so various synthesized adsorbents were analyzed for methane adsorption on a thermodynamic basis. Activated carbon from rice husk (AC-RH) was synthesized and its methane adsorption capacities were compared with phenol based activated carbons (AC-PH2O and AC-PKOH). The adsorption experiments were conducted by volumetric method under various constant temperatures (293.15, 303.15, 313.15 and 323.15 K) and pressure up to 3.5MPa. Maximum methane adsorption was observed in AC-RH as its surface area is higher than the other two adsorbents. The experimental data were correlated well with Langmuir-Fruendlich isotherms. In addition, isosteric heat of adsorption was calculated by using Clausius-Clapeyron equation.

Keywords

Adsorbed Natural Gas Activated Carbon High Pressure Adsorption Isosteric Heat of Adsorption

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