Catalytic converters operate at high temperatures, (600 C,) which is much higher than the exhaust temperature of most factory exhausts; thus they would not be compatible. In addition, most emissions from factories are not un-combusted fuels (which CCs process), for a couple of reasons including the simple fact that most industrial processes which emit exhausts are run at steady state, and have been optimized to the point where nearly all the fuel is utilized. Particulate emissions are a real issue, as are dangerous vapors, but these are eliminated by various other remedies (such as filters and other sequestrations).