Catalytic hydrodehalogenation of halon 1211 (CBrCIF₂) over carbon-supported palladium catalysts

The hydrodehalogenation of halon 1211 over Pd/C catalysts was studied over a relatively narrow temperature range, from 453 to 573 K. The main products of the reaction are CH₂F₂ and CHBrF₂ with CHClF₂ formed as a minor product. Pd/C catalysts show high initial activities but undergo gradual deactivation before reaching a steady-state activity level. Experimental results suggest that CHBrF₂ and CHClF₂ are formed via the secondary reaction of CF₂ with HBr and HCl