8.低石炭化度炭の低温液相分解反応

抄録

Liquid-phase cracking of low rank coal (Buckskin, Taiheiyo and Yallourn coals) at 350〜440℃ under 2MPa of initial nitrogen atmosphere has been studied to produce upgraded coal with high heating value, reducing the tendency to spontaneous ignition. Liquid-phase cracking of Buckskin (USA subbituminous) coal using iron oxide catalyst in the presence of t-decalin at 440℃ gave 11.6wt% of gas, 8.9wt% of oil and 74.0wt% of upgraded coal with small amount of water. Gaseous product consisted of mainly carbon dioxide (62wt%) and methane. Heating value of the upgraded coal increased to 7,440kcal/kg, as compared with 4,610kcal/kg of untreated coal and the behavior of spontaneous ignition was greatly improved by the liquid-phase cracking.