Abstract

The present work deals with the catalytic behaviour of a series of ceria and manganese-based catalysts for the deep single combustion chlorinated compounds in air. Our attention is focused on both activity and product selectivity of Ce/Zr and Mn/Zr in the oxidation of 1,2-dichloroethane (1,000 ppm) and trichloroethylene (1,000 ppm). This study also makes an attempt to establish a correlation between physico-chemical properties and catalytic performance.

Both series of mixed oxides exhibited a noticeable activity in the combustion of both compounds, Ce_0.5Zr_0.85O₂, Ce_0.5Zr_0.5O₂ and Mn_0.4Zr_0.6O₂ being the samples with the most promising catalysts. A remarkable acidity and readily accessible active oxygen species played a key role in determining the catalytic behaviour. As for the product selectivity, CO₂, CO, HCl and Cl₂ were the main products. The yield of CO₂ and Cl₂ was favoured as cerium or manganese content was increased. However, selectivity to chlorine was noticeably limited by the addition of stream in favour of HCl.

Recommended Citation

de Rivas, Beatriz; López-Fonseca, Rubén; Gutierrez-Ortiz, Miguel A.; and Gutiérrez-Ortiz, Jose I. (2008) "Analysis of the Behaviour of Different Mixed Oxides in the Treatment of Cl-VOC Containing Gas Streams," International Journal of Chemical Reactor Engineering: Vol. 6: A47.
Available at: http://www.bepress.com/ijcre/vol6/A47