Study On Liquefaction Of Yima Coal

Yima raw coal was selected to research its liquefaction performances. Effects of different reaction time, temperature, and initial hydrogen pressure on the liquefaction performances, the physical-chemical characteristics of liquefied oils and residues were probed into. Then the results are summarized as follows:The temperature, initial hydrogen pressure and reaction time are three important factors in yima raw coal liquefaction performance. The conversion and oil yield of liquefaction decreased with the temperature, but the oil yield of liquefaction increased firstly and then decreased with the temperature, initial hydrogen pressure, and reaction time. At 9MPa, 120min, different temperature, each products,sent rate are smaller. At 380℃, 120min, different initial hydrogen pressure, each products,sent rate are smaller. Whten the reaction time is achieved maximum, the conversion and oil yield of liquefaction are achieved maximum.Basing on the contemporary instrument analytical methods, the investigation is to research properties of liquid oils and residues. According to the group composition, the oil can be divided into saturated alkanes, aromatics and polar compounds, and alkanes and aromatics are the main fractions, including a little of alkylanthralene, ancenaphthene, pyrene, chrysene and phenylbenzene. Effects of reaction conditions on the physical and chemical characteristics of the oils are remarkable. The densities are different with the different reaction conditions. But the compositions and properties of the liquefied oils, and residues have a close relationship with the different reaction conditions.