Effects of carbonization temperature on the products from integrated mild-liquefaction and carbonization process of Hongliulin coal

The integrated mild-liquefaction and carbonization experiments of Hongliulin coal were conducted at 430-600 ℃, and distributions and physico-chemical properties of the obtained products were investigated. The results show that the yields of semi-cokes, organic liquid products and n-hexane soluble organic products were up to 40.64%-53.02%, 30.89%-36.98% and 29.74%-33.28%, respectively. The increasing carbonization temperature in the relatively low temperature range was favorable for the elevated yield of n-hexane soluble organic products, while at relatively high temperature presenting an opposite one. The semi-cokes obtained at 430 ℃ presented a strong caking property, while those at 550 ℃ showed no caking property, and the content of their volatile matters decreased to about 10%. It is suggested that the produced semi-coke could be directionally utilized as blending coal in coking or smokeless fuel by adjusting carbonization temperature.