Water Vapour and Co-Pollutants in Feed Streams

Influence of Water Vapour and Co-Pollutants in Feed Streams 

In practical applications the flue gas stream carries chloro-organics with a relatively low concentration in a mixture with water vapour (moisture) whose concentration 

Dichloroethane distillation residne Vinyliden chloride distillation residue  

Actual chloro-organic wastes from plants producing vinyl chloride are an industrial example of complex mixtures of Cl-VOCs. These wastes (heavy residues from dichloroethane and vinylidene chloride distillation) are characterized by a complex composition, particularly complicated by the presence of a significant amount of heavily oxidized polychloroolefins with an insufficient amount of hydrogen for the stoichiometric formation of HCl. Typical compositions of these wastes are given in Table 4.3. 

It should also be considered that industrial exhaust gases contain NOx, CO and H2O together with Cl-VOCs. The usual concentration of NOx and CO in, for example, cogeneration and combustion exhaust gases are, respectively, in the range 100-1,000 and 1,000-50,000 ppm. From a practical point of view, it is thus crucial to assess whether designed catalysts still succeed in oxidizing Cl-VOCs efficiently in the presence of co-pollutants or if the latter induce any kind of deactivation. 

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