Effect of reduced pressure on oil shale retorting

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Diss. Abstr. Int. B; (United States)

OSTI ID:6317562

Yang, H

The effect of reduced pressures ranging from 0.05 to 0.86 atm on the rate of oil generation, oil yield, and the chemical and physical properties of produced oil were determined as functions of heating rate, the flow rate and type of sweep gas, and the grade of oil shale. First-order kinetics adequately approximated the overall retorting rate regardless of the type and pressure of the sweep gas. The activation energy remained relatively constant with pressure for each sweep gas, while the pre-exponential factor increased as pressure decreased. The rate expressions for retorting with nitrogen and CO/sub 2/ were substantially the same, while retorting with water vapor produced a higher rate constant. A mathematic analysis was conducted to predict the oil yield, the amounts of coke and gas, and the rate of oil generation under reduced pressure.

• OSTI ID: 6317562
• Journal Information: Diss. Abstr. Int. B; (United States), Journal Name: Diss. Abstr. Int. B; (United States) Vol. 44:7; ISSN DABBB
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040402* -- Oil Shales & Tar Sands-- Surface Methods
ACTIVATION ENERGY
BITUMENS
BITUMINOUS MATERIALS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL PROPERTIES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
ENERGY
ENERGY SOURCES
FLOW RATE
FOSSIL FUELS
FUELS
HEATING RATE
KINETICS
LOW PRESSURE
MATERIALS
MATHEMATICAL MODELS
NITROGEN
NONMETALS
OIL SHALES
OIL YIELDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
REACTION KINETICS
RETORTING
STEAM
TAR
YIELDS