热溶预处理油煤浆的粘度变化

Effect of Thermal Dissolution Treatment on Viscosity of Coal-Oil Slurry

将神华煤与循环油混合油煤浆经不同热溶温度预处理后,研究了油煤浆粘度的变化情况及原因。研究发现:与未经热溶处理的油煤浆相比,经热溶处理的其粘度有所增大。在同一热溶温度处理后的油煤浆在测粘过程中,粘度随测量温度的升高而减小,并没有出现粘度峰,粘度(η)与测量温度(tM)的关系为。而在同一测粘温度下,经不同热溶温度处理的油煤浆粘度变化情况却截然不同:在神华煤发生热分解反应之前(<320℃),η基本上随热溶温度(tT)的升高呈直线增加,η=B+ktT;在开始发生热解反应以后(>320℃),粘度在370℃时出现了峰值,

A study was performed to determine the effect of thermal dissolution treatment on viscosity of the coal-oil slurry （a mixture of Shenhua coal and recycle oil of coal liquefaction）. For thermal dissolution treated coal-oil slurry samples, the viscosity （η） and measuring temperature （tM） data were well correlated by：η=Aexp[Eη/8.3145×（273＋tM）].When thermal dissolution was performed at 〈320℃, the viscosity increased with the thermal dissolution temperature （tτ） in a linear manner：η=B-ktτ. When the thermal dissolution temperature was 〉320℃, Shenhua coal began to decompose resulting in a peak viscosity at 370 ℃, and the correlation became more complex：η=η0＋2α/π w/4（tτ-tηmax）^2＋w^2