85.石炭の液化反応に及ぼす超音波事前処理の影響

抄録

The influence of an ultrasonic pretreatment of coal-solvent slurry on the oil yield in cola liquefaction reaction. Oil yields greatly changed depending on the coal degree, period and vibration number of irradiation and atmospheric conditions. Five minutes ultrasonic irradiation (20kHz) to the coal (carbon content; 77.1 mass%-daf) under hydrogen condition gave about 6 mass% oil more compared with no treatment. It is suggested that ether bonds in coal structure are broken by cavitation energy (10 to 50kcal/mol) and stabilized by hydrogen atom. This causes less production of water molecules during the coal liquefaction reaction.