Physical and chemical behavior of liquefied coal in solids separation. Quarterly report, July-September 1979

Technical Report · Mon Oct 01 04:00:00 EDT 1979

OSTI ID:5320624

Briggs, D E; Cameron, J; Ho, B; Romine, J C; Smith, P A.S.; Ebnesajjad, S; Islip, P N; Rothschild, W

The aliphatic components of oils and resins, low M.W. asphaltenes, high M.W. asphaltenes and preasphaltenes from the liquefaction of an Illinois No. 6 Coal in the H-Coal process were analyzed by the Deno oxidative degradation procedure. Infrared (ir) spectroscopy was used to determine the presence of hydrogen bonded and free hydroxyl groups in the oils and resins, low M.W. asphaltenes and high M.W. asphaltenes over a range of temperatures. The interaction of coal-derived liquids with precoat materials was studied using the product oil filtrate from the liquefaction of an Illinois No. 6 Coal in the H-Coal process. A study was initiated to determine the effect of precipitation inducing solvents on the filtration of a product oil slurry produced from a Kentucky No. 9 Coal in the SRC I process. Data were taken to determine the particle size distribution of coal-derived asphaltenes at various conditions by small angle x-ray scattering. Normal force measurements have been made using a quartz load washer mounted in the upper-platen shaft of the rheometer. Testing with H-Coal vacuum still bottoms material indicates the existence of relatively weak normal stresses increasing with decreasing temperature. Viscosity isotherms of oils and resins, asphaltenes, and whole H-Coal material over a wide range of shear rate have been made. Oils and resins behave essentially as a Newtonian Fluid. For asphaltenes, viscosity shows a pronounced dependence on shear-rate history at lower shear rates and is thixotropic. The viscosity of H-Coal is weakly dependent on shear rate history and shows a definite amount of thixotropy. The main distinction of H-Coal is its shear-thinning viscosity which resembles some polymer materials. A master curve of viscosity versus shear rate at 90/sup 0/C was constructed using time-temperature superposition of H-Coal viscosity data.

• Research Organization: Michigan Univ., Ann Arbor (USA). Dept. of Chemical Engineering
• DOE Contract Number: AS01-76ET10550
• OSTI ID: 5320624
• Report Number(s): DOE/ET/10550-T4; FE-2550-12; ON: DE82004542
• 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
ASPHALTENES
ASPHALTS
BITUMENS
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL BONDS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
DATA
DISPERSIONS
ENERGY SOURCES
EXPERIMENTAL DATA
FILTRATION
FLUIDS
FOSSIL FUELS
FUEL SLURRIES
FUELS
H-COAL PROCESS
INFORMATION
INFRARED SPECTRA
LIQUEFACTION
LIQUIDS
MATERIALS
MIXTURES
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
OXIDATION
PARTICLE SIZE
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
PRECIPITATION
RADIATION SCATTERING ANALYSIS
RESEARCH PROGRAMS
RESINS
RHEOLOGY
SEPARATION PROCESSES
SHEAR
SIZE
SLURRIES
SOLVENTS
SPECTRA
SRC PROCESS
STRUCTURAL CHEMICAL ANALYSIS
SUSPENSIONS
TAR
THERMOCHEMICAL PROCESSES
VISCOSITY