Preparation of coal slurry with 2-propanol.
This study explored the feasibility of using waste organic solvents as substitutes for water to prepare coal slurries. The rheological properties of coal-2-propanol slurries were examined and compared with that of coal-water slurry (CWS). The good compatibility between coal particles and 2-propanol resulted in stable particle suspension in slurry which usually exhibit Newtonian behaviour. However, coal-2-propanol slurries usually shown higher viscosities comparing to CWSs at a fixed solid loading due to swelling of coal by 2-propanol. In addition, coal-2-propanol slurries demonstrated lower settling rates (higher stability) compared to CWSs presumably due to good compatibility between coal particles and 2-propanol. Finally, coal-2-propanol slurries formed bulky sediment with loose structure even coal particles suspended in 2-propanol were more stable than coal particles in CWSs.
Shin
Yu-Jen
YJ
Department of Resources Engineering, National Cheng Kung University, Tainan, Taiwan, ROC.
Shen
Yun-Hwei
YH
D019840:2-Propanol / Q000032:analysis*; D003031:Coal; D015386:Hazardous Substances; D007220:Industrial Waste; D009930:Organic Chemicals; D010316:Particle Size; D012212:Rheology; D012997:Solvents; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000032:analysis; D018508:Water Purification
D003031:Coal; D015386:Hazardous Substances; D007220:Industrial Waste; D009930:Organic Chemicals; D012997:Solvents; D014867:Water; D019840:2-Propanol