Phosgene Synthesis Catalysis: The Influence of Small Quantities of Bromine in the Chlorine Feedstream

The effect of relatively low concentrations Br2(g) in the Cl2(g) feedstock for phosgene synthesis catalysis via reaction CO(g) and over activated carbon (Donau Supersorbon K40) is explored. Under stated conditions absence a catalyst, BrCl(g) forms from Br2(g). Phosgene catalyst at 323 K investigated Br2(g):Cl2(g) molar flow ratios range 0–1.52% (0–15,190 ppm) shows enhanced rates production. Maximum production observed ratio 1.52% (15,190 ppm), which corresponds to an enhancement rate ?227% with respect incident bromine co-feed. A model proposed account experimental observables, where highlighted as significant intermediate. Specifically, are associated dissociative adsorption that indirectly increases pool Cl(ad) available reaction.