Heterogeneous catalysts and process for reductive dechlorination of polychlorinated hydrocarbons*
Ekaterina S. Lokteva1, Elena V. Golubina1, Stanislav A. Kachevsky1, Anara O. Turakulova1, Valery V. Lunin1, and Pietro Tundo2
1Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1 Building 3, Moscow 119992, Russia; 2INCA Consortium, Via delle Industrie, 21/8-30175 Marghera (VE), Italy
Abstract: The utilization and decomposition of chlorinated wastes without formation of dioxins are challenges of great environmental importance. In this work, the catalytic reductive methods of chlorinated organics processing are described, focusing on catalyst development. Pd-containing catalysts are improved by modification of supports [use of ultra dispersed diamond (UDD) or double oxides] or by dilution of Pd by not-noble metals (Fe, Ni, Cu). Both ways are effective for the processing of 1,3,5-trichlorobenzene (TCB) as a model of polychlorinated organics. The reasons for improvement of catalysts are discussed. The best catalysts were effectively used for hydrodechlorination (HDC) of hexachlorobenzene (HCB).
Keywords: hydrodechlorination; reductive dechlorination; chlorinated organics; Pd catalysts; bimetallic catalysts; double oxides; ultra dispersed diamond.
*Pure Appl. Chem. 79, 1831-2100. An issue of reviews and research papers based on lectures presented at the 1st International IUPAC Conference on Green-Sustainable Chemistry, held in Dresden, Germany, 10-15 September 2006.