Gas-Phase Catalytic Decomposition of Mixtures of Low-Molecular-Weight Chlorinated VOCs

摘要

The oxidative decomposition of binary mixtures of chlorinated VOCs (1,2-dichloroethane, dichloromethane and trichloroethylene) over H-ZSM-5 and chemically dealuminated H-Y zeolite catalysts has been investigated. The ease of destruction decreased in the order: DCE>DCM>TCE. The main oxidation products were CO, CO_2, HCl and Cl_2. Some other chlorinated by-products were detected as well (vinyl chloride, methyl chloride and tetrachloroethylene). The destruction of binary mixtures induced an inhibition of the oxidation of each chlorinated compound. Likewise, an important decrease in the formation of intermediates was noticed, and HC1 selectivity was largely improved.