Effects of preheater residence time on the rheology of SRC-I slurries under preheater conditions. Final report. [Time dependence at high temperature in ORNL test facilities]

Technical Report · Thu Sep 01 04:00:00 EDT 1983

OSTI ID:5806882

Lee, D D; Sams, T L

Studies were made on SRC-I feed slurries under preheater conditions to determine the effects of residence times at or above 500 K on the rheological properties of the slurry. Measurements were taken at 17.3 MPa pressure, at reaction times from 15 to 120 s, and at temperatures from 450 to 644 K. Results show that an increase in residence time from 15 to 45 s results in a decrease in apparent viscosity by about 50% at 589 K. The experiments also revealed that after relatively short reaction times (2 min) without hydrogen pressure, the products exhibit fairly low viscosity. At reaction times less than 2 min, the viscosity changes rapidly with reaction time at the temperatures examined. The results demonstrate that rheological data under preheater conditions must be taken carefully at a constant residence time in order to avoid reaction-time effects as the shear rate is changed.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5806882
• Report Number(s): ORNL/TM-8708; ON: DE84000651
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
COAL LIQUEFACTION
DATA
DISPERSIONS
EXPERIMENTAL DATA
HEATERS
INFORMATION
LIQUEFACTION
MIXTURES
NUMERICAL DATA
RHEOLOGY
SLURRIES
SRC PROCESS
SUSPENSIONS
TEMPERATURE DEPENDENCE
TEST FACILITIES
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE