title: Application of high silica zeolite ZSM-5 in a hybrid treatment process based on sequential adsorption and ozonation for VOCs elimination.
abstract: In this study, a hydrophobic synthetic zeolite, namely ZSM-5 is chosen as an adsorbent/catalyst for toluene removal. Experimental results showed that toluene adsorption onto ZSM-5 was favourable, following a Langmuir adsorption isotherm model. ZSM-5 zeolite was regenerated using gaseous ozone at low temperature. Adsorbed toluene was oxidised, releasing mainly CO2 and H2O. Traces of oxidation by-products such as acetic acid and acetaldehyde were formed and remained adsorbed after the oxidativate regeneration with ozone. After four successive cycles of adsorption/ozonation, the adsorption efficiency was not affected (92%-99%). These results showed that volatile organic compound (VOC) removal by adsorption onto ZSM-5 zeolite followed by ozone regeneration could be used as a promising hybrid process for the control of VOC emissions in terms of efficiency.
authors.affiliation: Laboratoire de Chimie de la Matière Condensée (LCMC), Faculté des Sciences et Techniques, Université Sidi Mohamed Ben Abdellah, B.P. 2202, Fès , Maroc. Electronic address: hicham.zaitan@usmba.ac.ma.
authors.forename: Hicham
authors.initials: H
authors.lastname: Zaitan
authors.affiliation: Université de Toulouse, INPT, UPS, Laboratoire de Génie Chimique, 4, Allée Emile Monso, F-31030 Toulouse, France; CNRS, Laboratoire de Génie Chimique, F-31030 Toulouse, France.
authors.forename: Marie Hélène
authors.initials: MH
authors.lastname: Manero
authors.affiliation: Laboratorio de Tecnologías Limpias (F. Ingeniería), Universidad Católica de la Santísima Concepción, Alonso de Ribera 2850, Concepción, Chile.
authors.forename: Héctor
authors.initials: H
authors.lastname: Valdés
mesh_terms: D000327:Adsorption; D000397:Air Pollution / Q000517:prevention & control*; D002384:Catalysis; D004785:Environmental Pollutants / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D014050:Toluene / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D055549:Volatile Organic Compounds; C570564:ZSM-5 zeolite; D017641:Zeolites; D014050:Toluene; D010126:Ozone
keywords: Adsorption; Ozone; Toluene; VOCs; Zeolite