煤液化馏分油密度和黏度与温度的关联研究

常压下考察了煤液化油（CLO） 14个窄馏分的终馏点对密度和黏度的影响及其变化规律.选取CLO中几个典型煤液化油馏分分别在20℃和50℃下的密度值和黏度值,考察了煤液化油密度和黏度随温度的变化规律,结果表明：①小于200℃和大于280℃的馏分段,终馏点对密度影响较明显,200～ 280℃之间的馏分段影响不明显;CLO馏分密度随温度的升高而降低,并与温度呈很好的线性关系,其体积膨胀系数随温度的升高而降低.②CLO馏分液体动力黏度η与热力学温度T＆#39;之间的关系符合Andrade液体黏度关联式;黏度随温度的升高而降低,沸程低的馏分黏温性质较好,而沸程高的馏分黏温性质差,说明CLO馏分黏度受温度的影响较大.

Association study on temperature and the density and viscosity of distillates oil from coal liquefaction

The impacts of end boiling points （EBP） of 14 narrow fractions of coal liquefaction oil （CLO） on density and viscosity and variation laws were investigated at atmospheric pressure. The density/viscosity of several typical CLO fractions at 20 ℃ and 50 ℃ temperature are selected to investigate the variation law of density and viscosity of CLO with temperature. The results indicate that, for the 〈 200 ℃ fractions and 〉 280 ℃ fractions, the EBP has an obvious impact on density. For the 200 -280 ℃ fraction, the impact is not great. The density of CLO goes down with rising temperature and maintains a good linear relation with temper- ature. Whereas, the volume expansion coefficient becomes smaller with rising temperature. The relation be- tween kinetic viscosity 7/of CLO and thermodynamic temperature T＇ conforms to the correlation of Andrade liq- uid viscosity. The viscosity becomes lower with rising temperature, the fractions of lower boiling range offer a good viscosity, while the fractions of higher boiling range have a poor viscosity-temperature property, indica- ting that the temperature has a greater impact on the viscosity of CLO.