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HERO ID
6936864
Reference Type
Journal Article
Title
Ethanol removal using activated carbon: Effect of porous structure and surface chemistry
Author(s)
Silvestre-Albero, A; Silvestre-Albero, J; Sepulveda-Escribano, A; Rodriguez-Reinoso, F; ,
Year
2009
Publisher
ELSEVIER SCIENCE BV
Location
AMSTERDAM
Page Numbers
62-68
DOI
10.1016/j.micromeso.2008.10.012
Web of Science Id
WOS:000264619200011
Abstract
Activated carbons with increasing porosity have been prepared by chemical activation of olive stones using ZnCl2 followed by physical activation with CO2. The development of porosity and surface area with burn-off favours the adsorption capacity for ethanol. However, the total amount adsorbed (g/100 g AC) achieves a maximum for the sample with 30% burn-off. this amount decreasing thereafter. Apparently, for a low boiling point alcohol such as ethanol there is a critical pore size which allows an optimum packing of the adsorbed ethanol molecules. A further broadening of the porosity becomes detrimental due to the decreased overlapping adsorption potential inside the micropores. Incorporation of surface functionalities (oxygen surface groups) on the activated carbon enhances the adsorption capacity through the development of specific interactions between the ethanol molecule and the oxygen surface groups. (C) 2008 Elsevier Inc. All rights reserved.
Conference Name
3rd International Workshop on New Challenges for Nanoporous Materials
Conference Location
Alicante, SPAIN
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