石炭直接液化連続試験装置による液化反応特性と液化油の性状および化学構造

抄録

The liquefaction of four coals (Yallourn, Soya-koishi, Taiheiyo, and Shin-yubari coals) with different coal ranks has been made by using the 0.1 tjd direct liquefaction test plant.The low rank coals generally produced larger CO, CO₂ and H₂O, derived from oxygen present in coal.The hydrogen consumption decreased linearly with the increase in the coal rank and the yield of coal-derived oil (b.p.IBP-325°C) was largest for Soya-koishi coal.The produced coal crude oil was fractionated into naphtha (IBP-200°C), middle (200-325deg;C), and bottom (325°C-) fractions by high-vacuum distillation, and the properties and chemical structures of three fractions were analyzed.The specific gravity of coal-derived oil was greater and the atomic ratio H/C was smaller, compared with the corresponding fractions of petroleum, but these values of three fractions have no great differences among coals.In conclusion, coal liquefaction depended largely on feed coal, but the properties, structural parameters and molecular weight distributions of coalderived oils were almost independent of feed coal under the same reaction condition