THE INFLUENCE OF COAL RANK ON FORMATION OF GASEOUS HYDROCARBONS IN HYDROGASIFICATION OF COAL

The kinetics of the formation of C-1-C-3 hydrocarbons in hydrogasifica tion of six coals covering a range of metamorphism were investigated. All experiments were carried out under non-isothermal heating conditio ns at the rate of 3 K min(-1) from ambient to 1200 K and under 2.5 MPa of hydrogen. Conversion ratios of carbon to the hydrocarbons as well as yields of the hydrocarbons in hydrogasification of the coals were c alculated. Highest conversions to total gaseous products were observed for the medium-rank coals. Highest yields of methane were obtained wi th the older coals, whilst maximum yields of ethane and propane were o btained with the medium-rank coals. Copyright (C) 1996 Elsevier Scienc e Ltd.