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AD–OX: A sequential oxidative process for water treatment— Adsorption and batch CWAO regeneration of activated carbon

Delmas, Henri and Creanga-Manole, Carmen and Julcour-Lebigue, Carine and Wilhelm, Anne-Marie AD–OX: A sequential oxidative process for water treatment— Adsorption and batch CWAO regeneration of activated carbon. (2009) Chemical Engineering Journal, vol. 152 (n° 1). pp. 189-194. ISSN 1385-8947

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Official URL: http://dx.doi.org/10.1016/j.cej.2009.04.040

Abstract

A sequential process for water treatment involving usual adsorption on activated carbon (AC) followed by wet air catalytic oxidation of the adsorbed pollutants has been carried out in a fixed bed reactor with a mixture of two model pollutants. The first step achieves water purification while the second one reduces the organic pollution but also, more importantly, performs some AC in situ regeneration. The experimental work has been done with AC yet extensively used and stabilized by long range continuous oxidation. The two steps have been analyzed successively showing very important drop of adsorption capacity with respect to fresh AC but efficient oxidative partial regeneration. As expected with used AC no more evolution occurs in between two consecutive runs. The first step of competitive adsorption has been simulated by a model leading to higher diffusivities than estimations based on correlations. The main features of the complex second step, involving simultaneous non-isothermal desorption and three phase catalytic reaction, are qualitatively explained.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://dx.doi.org/10.1016/j.cej.2009.04.040
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Réaction, mélange & séparation (RMS)
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Deposited By: Carine JULCOUR
Deposited On:27 Sep 2012 11:12

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