中文摘要：

基于水热处理煤的镜质组反射率测定和热重分析,研究了水热处理对神华煤结构及液化性能的影响,并通过TG/DTA和IR对比考察了原煤和水处理煤液化产物前沥青烯结构变化.结果表明,水热处理提高了煤的镜质组反射率,水处理温度越高处理煤的镜质组反射率越大;250 ℃水热处理煤的最大反射率为0.774,其失重率显著高于其他水处理煤.水热处理对煤液化性能的影响与处理煤的镜质组反射率及热重性能变化一致.一定温度下水处理能够促进煤分子中脂肪侧链的裂解和环化,提高了处理煤镜质组反射率和煤基体的供氢能力,改善煤的液化性能.此外,水热处理也明显提高了液化产物前沥青烯的热稳定性.

英文摘要：

The effects of hydrothermal treatment on the structure and hydroliquefaction property of Shenhua coal were studied by determination of maximum reflectivity of vitrinite and TG analysis of treated coal. In addition, TG/DTA and IR characterizations were also used to compare the structure of preasphaltenes obtained from liquefaction products of raw coal and hydrothermally treated coal. The results indicate that maximum reflectivity of vitrinite from treated coal is higher than that of raw coal and increases with the hydrothermal treatment temperature. For 250°C hydrothermal treatment coal, the vitrinite maximum reflectivity is 0.774% and the weight loss is higher than that of other treated coal. The effects of hydrothermal treatment on hydroliquefaction properties of treated coal are in accord with the influences on vitrinite maximum reflectivity and thermogravimetric property. Hydrothermal treatment of coal under optimal temperature can improve the pyrolysis and cyclization of aliphatic side chain in coal macromolecular, the ability of donation hydrogen, and increase the vitrinite maximum reflectivity so that the liquefaction reactivity of the treated coal is improved. In addition, the thermal stability of preasphaltene from liquefaction products of treated coal is also distinctly enhanced compared to that of raw coal.