Total Oxidation of Halogenated Hydrocarbons

Direct thermal combustion represents the conventional technology for the destruction of chlorinated organic compounds. However, besides the very high temperatures ( 1000 °C), this route has the typical disadvantage of generating more toxic by-products, such as the polychlorinated carcinogenic and environmentally persistent dibenzodioxins and polychlorinated dibenzofiirans [57]. 

Catalytic combustion of chlorinated organic compounds overcomes these drawbacks. First, it permeates much lower temperatures and total oxidation of the toxic by-products. Second, it can treat efficiently very dilute pollutants ( 1%) that cannot be thermally combusted [57], The oxidation of chlorobenzene over manganese mixed oxides is one example. When manganese was coupled with titania, total conversions were reported at temperatures as low as 400 °C. Differently to platinum [58] where polychlorinated benzenes are still produced. 

In addition to the combustion of the hydrocarbon part, the catalytic oxidation of chlorinated aromatics also leads to HQ and CI2 that may generate the catalysts deactivation. Working with these mixed oxide catalysts eliminates this disadvantage due to at least partial chlorination of the surface component cations. 

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