Rheological behavior of Shengli coal-solvent slurry at low-temperatures and atmospheric pressure  

作　　者：WANG Yong-gang YAN Yan GUO Xiang-kun Xu De-ping 

机构地区：[1]School of Chemical and Environmental Engineering, China University of Mining ＆ Technology, Beijing 100083, China

出　　处：《Mining Science and Technology》2009年第6期779-783,共5页矿业科学技术（英文版）

基　　金：Project 2004CB217601 supported by the National Basic Research Program of China

摘　　要：We report the results from systematic studies of Shengli lignite coal-solvent slurries. Solvent type, temperature, coal to solvent ratio, particle granularity, shear rate and shear time were investigated. The viscosity of the solvents is time independent. However, the slurries are thixotropic. A change from pseudo-plastic to Newtonian behavior occurs as the temperature, or as the solvent to coal ratio, increases. The solvent used in the slurry affects the point at which the rheology changes from pseudo-plastic to Newtonian. The REC slurry changes at 1:1.2 coal to solvent ratio and at 40 °C. The HAR slurry changes at a 1:1.5 ratio and at 60 °C. The rheology of the slurries is pseudo-plastic at low shear rates but Newtonian at high shear rates.We report the results from systematic studies of Shengli lignite coal-solvent slurries. Solvent type, temperature, coal to solvent ratio, particle granularity, shear rate and shear time were investigated. The viscosity of the solvents is time independent. However, the slurries are thixotropic. A change from pseudo-plastic to Newtonian behavior occurs as the temperature, or as the solvent to coal ratio, increases. The solvent used in the slurry affects the point at which the rheology changes from pseudo-plastic to Newtonian. The REC slurry changes at 1：1.2 coal to solvent ratio and at 40 °C. The HAR slurry changes at a 1：1.5 ratio and at 60 °C. The rheology of the slurries is pseudo-plastic at low shear rates but Newtonian at high shear rates.

关 键 词：direct liquefaction coal-solvent slurry rheological behaviors Shengli lignite 

分 类 号：O631.21[理学—高分子化学] TQ633[理学—化学]