Name : The 37th Conference of Coal Science
Number : 37
Location : [in Japanese]
Date : September 28, 2000 - September 29, 2000
Pages 401-404
Shape of coal particle/aggregate of Upper-Freeport pyridine soluble (UFPS), Illinois pyridine soluble (ILPS) and asphaltene from coal liquefaction residue (Asp) in dilute solution has been analyzed through viscosity measurements. The measurements were performed in capillary viscometer with the concentration ranged up to 60g/L at 25℃. The critical concentrations(C^*) were observed for UFPS/Pyridine, ILPS/Pyridine and Asp/Toluene, whereas it was not found in Asp/NMP. Applications of Pal & Rhodes equation suggested that coal particles in dilute solution at concentrations below C^* are approximately spherical in shape with some degree of solvation.
