Study On The Liquefaction Property10~#Chenghe High Sulfur Coal And Preparation Of Modified Asphalt From Chenghe Coal Liquefaction Residue

The high sulphur coal takes up a large proportion in the amount of Chinese coal resource, so it is a important coal resource with potential economic value. Choosing a proper clean coal technologys is important not only for rational use of high sulphur coal but also avoiding the environmental pollution. The direct coal liquefaction technology is one of clean coal technology and liquefaction residue contains a lot of aromatic hydrocarbons, carbon, sulphur and ash. In this paper, the liquefaction behavior of Chenghe high sulphured coal was investigated by34orthogonal experiments and liquefaction residue was used to modify asphalt in order to improve the added value of residue and offer reference for comprehensive utilization of Chenghe high sulphured coalThe effect of temperature, initial pressure of H2, the ratio of solvent to coal and catalyst dosage on liquefaction conversion was conducted through orthogonal experiments. The results showed that the primary sequence affecting the yield of fine coal is:catalyst dosage>initial pressure of H2>the ratio of solvent to coal> temperature and the optimum operation conditions were set for temperature420℃, initial pressure of H21.5MPa, the ratio of solvent to coal4and catalyst dosage3%, respectively. The conversation ratio of coal was29.3%heavy oil had the least oxygen functional groups and the most saturated structural matters under the optimum operation conditions. The FTIR spectrometer was employed to analyze the components of the liquefied products and the result indicated that the liquefaction liquids product had the same component including saturated hydrocarbon and aromatic hydrocarbon under different conditions. The extracted liquefaction residue contained saturated hydrocarbons and unextracted liquefaction residue was made up of unsaturated hydrocarbons. Compared the ultimate analysis of coal and residue, it was can fond that the H/C of residue was lower than that of coal. The SEM showed that residues have abundant pore structure.The asphalt was modified by liquefaction residues with7%of the additives. As a result, it was clarified that the softening point of asphalt raised4℃and the penetration of asphalt raised2.93mm at most. The modification mechanism of adding residues into asphalt was physical modification.