Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 56, Issue 2, Pages 139-145Publisher
ELSEVIER
DOI: 10.1016/S1387-1811(02)00465-1
Keywords
carbon molecular sieves; charcoal; CO2/CH4 separation; selectivity
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Carbon pellets have been prepared from powdered Eucaliptus globulus charcoal, by mixing with an organic binder followed by a thermal treatment in carbon dioxide. The obtained materials have been characterised by N-2 and CO2 adsorption and temperature-programmed decomposition of surface complexes. Their properties as carbon molecular sieves (CMS) have been evaluated by measuring the adsorption kinetics of CO2 and CH4 at room temperature. It has been found that, under the experimental conditions used, the adsorption selectivity is controlled by the methane adsorption rate, and this selectivity is higher for the CMS obtained at high temperature (870 degreesC), with a high heating rate and short activation time. (C) 2002 Elsevier Science Inc. All rights reserved.
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