Study on the relation of water content of the flame coal and its direct liquefaction reactivity

In this paper, the effect of different water content of the flame coal on its direct liquefaction reactivity was studied. The results show that: water content in the flame coal can be used as hydrogen supplier and promote direct liquefaction reaction inducing higher total conversion rate, higher oil yield and lower pre-asphaltene/asphaltene yield when the water content of the flame coal is of 20 ~ 30%. And the maximum of total conversion rate and oil yield is achieved 95.6% and 68.6%, respectively, when the water content of the flame coal is 25.5%. While the gas product yield and the pre-asphaltene/asphaltene yield is relatively lower, which is of 16.8% and 3.4%, respectively. This can be of practical significance to optimize the coal pre-treatment technology of direct liquefaction industry.