title: Kinetic study of the gas-phase hydrogenation of aromatic and aliphatic organochlorinated compounds using a Pd/Al2O3 catalyst.
abstract: The hydrodechlorination of dichloromethane (DCM), tetrachloroethylene (TTCE), chlorobenzene (CBZ) and 1,2-dichlorobenzene (DCBZ), all of them alone and in mixtures, over a commercial Pd/Al(2)O(3) catalyst in a continuous packed-bed reactor was studied in the present work. Results indicate that the reaction kinetics for the single compounds are pseudo-first order kinetics. The reactivity of the compounds studied is very different. So, whereas aromatic compounds and tetrachloroethylene can be fully converted at the operation conditions reported in this work, dichloromethane conversions are lower than 30% in all the cases. The hydrodechlorination of mixtures of organochlorinated compounds shows important inhibition effects, these effects increase as the number of chlorine atoms in the molecule increase. Reaction kinetics for the hydrogenation of mixtures can be represented by a Langmuir-Hinshelwood model.
authors.affiliation: Department of Chemical and Environmental Engineering, University of Oviedo, Julián Claveri;a s/n, 33071, Oviedo, Spain.
authors.forename: Elena
authors.initials: E
authors.lastname: López
authors.forename: Salvador
authors.initials: S
authors.lastname: Ordóñez
authors.forename: Herminio
authors.initials: H
authors.lastname: Sastre
authors.forename: Fernando V
authors.initials: FV
authors.lastname: Díez
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D002384:Catalysis; D017606:Chlorine Compounds / Q000737:chemistry*; D004785:Environmental Pollutants; D005740:Gases; D007700:Kinetics; D007854:Lead / Q000737:chemistry; D008962:Models, Theoretical
chemical_list: D017606:Chlorine Compounds; D004785:Environmental Pollutants; D005740:Gases; D007854:Lead; D000537:Aluminum Oxide