Mechanism of catalytic destruction of 1,2-dichloroethane and trichloroethylene over γ-Al2O3 and γ-Al2O3 supported chromium and palladium catalysts

摘要: Abstract The destruction mechanisms of C2-chlorinated hydrocarbons have been investigated. adsorption 1,2-dichloroethane (DCE) and trichloroethylene (TCE) on alumina supported catalysts was studied by FTIR-spectroscopy. Interpretation the spectra suggests that DCE occurs via HCl elimination to vinyl chloride, followed an attack a hydrogen surface oxygen double bond resulting in acetyl chloride. Subsequent chloride ion gives acetaldehyde can be further oxidized into acetate. With regard TCE, indicate TCE is attacked basic according Markovnikov’s rule. This results formation acyl which converted acetate like species. In addition, oxidation examined over catalysts. While itself not very active, palladium chromium containing are. absence water, tetrachloroethylene (PCE) observed. Addition water feed resulted decrease amount PCE produced. Although did affect conversion it inhibited reaction oxide. activity chromia catalyst compared might due supply bond. inhibitive effect probably blocking active sites.