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Received January 18, 2006
Accepted March 2, 2006
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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.
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References
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