✍ Scribed by Colette Braekman-Danheux; André Fontana; Ali Labani; Philippe Laurent
No coin nor oath required. For personal study only.
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 cokeoven 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 tied 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.
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One of the main uncertainties in analysing the coking process is the path followed by thevolatile gases as they leave the oven. The objective of this study was to make a first attempt at developing a model for determining the gas flow distribution within an oven during carbonization. The model repor