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J Hazard Mater

Title:		Tailoring activated carbons for the development of specific adsorbents of gasoline vapors
Author(s):		Vivo-Vilches JF; Bailon-Garcia E; Perez-Cadenas AF; Carrasco-Marin F; Maldonado-Hodar FJ;
Address:		"Departamento de Quimica Inorganica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain"
Journal Title:		J Hazard Mater
Year:		2013
Volume:		20131030
Issue:
Page Number:		533 - 540
DOI:		10.1016/j.jhazmat.2013.10.012
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"The specific adsorption of oxygenated and aliphatic gasoline components onto activated carbons (ACs) was studied under static and dynamic conditions. Ethanol and n-octane were selected as target molecules. A highly porous activated carbon (CA) was prepared by means of two processes: carbonization and chemical activation of olive stone residues. Different types of oxygenated groups, identified and quantified by TPD and XPS, were generated on the CA surface using an oxidation treatment with ammonium peroxydisulfate and then selectively removed by thermal treatments, as confirmed by TPD results. Chemical and porous transformations were carefully analyzed throughout these processes and related to their VOC removal performance. The analysis of the adsorption process under static conditions and the thermal desorption of VOCs enabled us to determine the total adsorption capacity and regeneration possibilities. Breakthrough curves obtained for the adsorption process carried out under dynamic conditions provided information about the mass transfer zone in each adsorption bed. While n-octane adsorption is mainly determined by the porosity of activated carbons, ethanol adsorption is related to their surface chemistry, and in particular is enhanced by the presence of carboxylic acid groups"
Keywords:		Adsorption Air Filters Air Pollutants/*chemistry Carbon/*chemistry Carboxylic Acids/chemistry Diffusion Environmental Restoration and Remediation Equipment Design Ethanol/chemistry Gases Gasoline/*analysis Hot Temperature Hydroxides/chemistry Octanes/chem;
Notes:		"MedlineVivo-Vilches, J F Bailon-Garcia, E Perez-Cadenas, A F Carrasco-Marin, F Maldonado-Hodar, F J eng Research Support, Non-U.S. Gov't Netherlands 2013/11/19 J Hazard Mater. 2013 Dec 15; 263 Pt 2:533-40. doi: 10.1016/j.jhazmat.2013.10.012. Epub 2013 Oct 30"