Pyrolysis And Copyrolysis Of Coal And Oil Shale

A fixed-bed pyrolysis and copyrolysis of Huolinhe lignite and Longkou oil shale was investigated, The results indicated that synergetic effect existed with the oil yield increased ,water yield decreased, and the synergetic effect varied with the mass percentage of coal differed.The copyrolysis oil yield of Yilan oil shale and Ruqigou anthracite is a little higher than the linear sum of their oil yield in the pyrolysis process. But for the copyrolysis of Taiji gas coal and Yilan oil shale, no significant change of the oil yield was found.Huolinhe lignite and Longkou oil shale were choosen as the material for the solid heat carrier experiment. Synergetic effect analyses of both the fixed-bed pyrolysis and the new retorting process with solid hot carrier (DG Process) were given. Huolinhe lignite is an ideal material for oil recovery by pyrolysis, with high volatile and low ash, its oil content is 8.55%. It is feasible to get oil with DG Process, as its oil yield reaches to 7.49%(ad), the oil recovery rate is 87.60%, 520℃ is the optimum temperature. The caloric content of coal gas can meet the need of city coal gas. It can be used as industry fuel such as generationg electricity. The ash of char is low, and the caloric content of coal gas is high. So it can be used as fuel in cement plant and power plant, or made into briquette as the gas-making material or fuel without smoke.Longkou oil shale is an ideal material for oil recovery by pyrolysis, with a high oil content of 14.38%. Its oil yield of DG Process reaches to 13.00%(ad), the oil recovery rate is 90.40%, 510℃ is the optimum temperature. The coal gas has a higher caloric content. It can be used as industry fuel such as generationg electricity. So it can be used as fuel in power plant.The optimum copyrolysis temperature for Huolinhe lignite and Longkou oil shale is about 510℃. Synergetic effect was found with the oil increased 9% and water decreased 36%.