Heterogeneous catalysts and process for reductive dechlorination of polychlorinated hydrocarbons

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 catalysis 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 catalysis are discussed. The best catalysts were effectively used for hydrodechlorination (HDC) of hexachlorobenzene (HCB). © 2007 IUPAC.