The process development unit (PDU) for upgrading coal liquefied oil started in April 2000. Continuous operation without any serious problem proves the stability of the PDU. The 1^<st> stage hydrotreatment, atmospheric distillation and gas-oil 2^<nd> stage hydrotreatment operation were completed. The following results were obtained. 1. 4140 hours of continuos operation in 1^<st> stage hydrotreatment (objective>1000 hours) 2. The cetane number for the gas-oil in 2^<nd> stage hydrotreatment to 43 (objective>35) 3. The production of gas-oil that satisfy JIS by blending coal liquefied oil with petroleum. 4. Obtain the engineering data for designing demonstration plant.
