title: Intensification of volatile organic compounds mass transfer in a compact scrubber using the O3/H2O2 advanced oxidation process: kinetic study and hydroxyl radical tracking.
abstract: This study assesses the potential of ozonation and advanced oxidation process O(3)/H(2)O(2) to enhance the dimethyldisulfide (DMDS) mass transfer in a compact chemical scrubber developed for air treatment applications. Theoretical calculations, through Hatta number and enhancement factor evaluations for two parallel irreversible reactions, were compared to experimental data and enabled the description of the mass transfer mechanisms. These calculations required the determination of the kinetic constant of the DMDS oxidation by molecular ozone ( [Formula: see text] ) and the measurement of the hydroxyl radical concentration within the scrubber. The competitive kinetic method using the 1,2-dihydroxybenzene (resorcinol) enabled to determine a value of the kinetic constant  [Formula: see text]  of 1.1×10(6)M(-1)s(-1) at 293K. Then, experiments using para-chlorobenzoic acid in solution allowed measuring the average hydroxyl concentration in the scrubber between the inlet and the outlet depending on the chemical conditions (pH and inlet O(3) and H(2)O(2) concentrations). High hydroxyl radical concentrations (10(-8)M) and ratio of the HO°-to-O(3) exposure (R(ct)≈10(-4)) were put in evidence.
authors: École Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, Rennes Cedex 7, France. pierre-francois.biard@ensc-rennes.fr
authors: Pierre-François
authors: PF
authors: Biard
authors: Annabelle
authors: A
authors: Couvert
authors: Christophe
authors: C
authors: Renner
authors: Jean-Pierre
authors: JP
authors: Levasseur
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D002723:Chlorobenzoates / Q000737:chemistry; D004220:Disulfides / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical / Q000737:chemistry*; D007700:Kinetics; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D012118:Resorcinols / Q000737:chemistry; D055549:Volatile Organic Compounds / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D002723:Chlorobenzoates; D004220:Disulfides; D012118:Resorcinols; D055549:Volatile Organic Compounds; D017665:Hydroxyl Radical; C021181:dimethyl disulfide; D010126:Ozone; D006861:Hydrogen Peroxide; C040768:4-chlorobenzoic acid; C031389:resorcinol