Abstract: The swelling behaviors of Shengli coal in different solvents, such as THN, DMF, STA and REC, are investigated to observe the effects of solvent swelling on apparent viscosity of the coal slurries. Changes in the coal surface characteristics have been studied by using SEM, BET and FTIR. The results showed that the coal in different solvent has a different swelling ratio, and the effect of DMF on swelling is more obvious than that of THN, STA and REC. The swelling ratio increases with temperature, and the swelled coal presents an incompact sandwich structure having a lower specific surface area and a larger pore diameter.

摘要： 为了考察溶胀作用对液化油煤浆黏度变化的影响作用，参照煤直接液化工艺条件，在四氢萘（THN）、N,N-二甲基甲酰胺（DMF）、液化起始溶剂（STA）和液化循环溶剂（REC）等不同有机溶剂中对胜利煤进行了溶胀行为研究。采用扫描电镜、孔隙比表面积分析仪、红外光谱仪等手段，研究了不同条件下胜利溶胀煤的表面性质变化。结果表明，胜利煤在极性溶剂N,N-二甲基甲酰胺中的溶胀度要大于在非极性溶剂四氢萘、起始溶剂和循环溶剂中的溶胀度；随着温度的升高，胜利煤的溶胀速率增大。溶胀后的胜利煤呈松散的云状结构，煤的形貌发生了一定程度变化；溶胀煤的孔径增大，比表面积减小。