Flash hydrogenation of coal 2. Yield structure for Illinois No. 6 coal at 100 atm

Abstract

Hydrocarbon yields are mapped for a mine-mouth sample of Illinois No. 6 coal in 100 atm of flowing hydrogen, brought to reaction temperature at 650 °C/s. The influence of reac tion temperature was explored from 620 to 980 °C with a vapour-product residence time of 0.6 s. The effect of increasing residence time was explored at 700 °C. The only light products observed in more than trace amounts (above 1%) were methane, ethane, propane, and BTX (benzene, toluene, and xylene). Carbon balances show little if any heavier material in the product at temperatures beyond 850 °C at 0.6 s vapour-residence time or beyond a residence time of 3 s at 700 °C.