Adsorption kinetics of various gases in carbon molecular sieves (CMS) produced from palm shell |
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Authors: | M.A. Ahmad W.M.A. Wan Daud M.K. Aroua |
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Affiliation: | 1. School of Chemical Engineering, University Science of Malaysia, Seri Ampangan, Nibong Tebal, 14300 Penang, Malaysia;2. Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia |
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Abstract: | Carbon molecular sieves (CMS) have been prepared from locally available palm shell of Tenera type by a thermal treatment technique involving carbonization followed by steam activation and benzene deposition technique. Carbonization of the dried palm shells was done at 900 °C for duration of 1 h followed by steam activation at 830 °C for 30–420 min to achieve activated carbons with different degree of burn-offs. The highest micropore volume of activated carbon obtained at 53.2% burn-off was found suitable to be used as a precursor for CMS production. Subsequent benzene deposition onto activated samples at temperature range from 600 to 900 °C for various benzene concentrations have resulted in a series of CMS with different kinetic selectivities. The molecular sieving behaviour of the CMS products was assessed by kinetic adsorption isotherms of O2, N2, CO2 and CH4 at room temperature. |
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