Rheological characterization of coal-solvent slurry at high temperature and pressure

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5002651

Oswald, G E; Youngblood, E L; Thurgood, J R

During the preheating operation in coal-solvent slurry dissolution liquefaction processes, the slurry exhibits pseudoplastic non-Newtonian flow behavior as well as a viscosity maximum when the heated coal becomes plastic. Rheological characterizations were made on 35 weight percent coal-solvent slurry at up to 700K (800/sup 0/F) at 13.9 MPa (200 psig) in a continuous flow bench-scale system. The system consists of high pressure slurry and hydrogen delivery systems, preheater, reactor/dissolver, vapor-liquid separator, and pressure control and slurry pressure letdown systems. For rheological characterization, preheated slurry was passed, at temperature and pressure, through a capillary or pipeline viscometer located at the preheater discharge. Preheater residence time and discharge temperature can be varied. Rheograms (shear stress vs shear rate plots) are presented for slurry at temperatures and pressures representative of the preheating operation, and the method of analysis is discussed.

• Research Organization: Utah Power and Light Co., Salt Lake City (USA); Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5002651
• Report Number(s): CONF-800610-10(Draft)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
COAL LIQUEFACTION
COAL LIQUIDS
DISPERSIONS
FLUIDS
FUEL SLURRIES
FUELS
LIQUEFACTION
LIQUIDS
MEASURING INSTRUMENTS
MIXTURES
PRESSURE DEPENDENCE
RHEOLOGY
SLURRIES
SUSPENSIONS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
VISCOSIMETERS