Coal hydromethanolysis with coke-oven gas 3. Influence of the coke-oven gas components on the char characteristics

To improve the economy of the hydropyrolysis process by reducing the hydrogen cost, it has been suggested to use coke-oven gas instead of pure hydrogen. The results presented here describe some characteristics of the chars obtained by pyrolysis carried out at 765°C under 3 MPa of various gas mixtures simulating coke-oven gas composition. The char obtained after pyrolysis under coke-oven gas pressure is not fundamentally different from those obtained under inert or hydrogen pressure, at least in porosity, optical texture and oxyreactivity in fixed and fluidized beds. The results show clearly the possibility of using coke-oven gas for coal pyrolysis and lead to the conclusion that synergy between metallurgical cokemaking and ‘creaming-off’ coal by hydropyrolysis will be profitable to both processes.