Evaluation of steam-to-oxygen ratios for forward combustion in Asphalt Ridge tar sand
Three one-dimensional and one three-dimensional physical simulations of forward combustion with steam-oxygen injection were conducted using Asphalt Ridge tar sand. One-dimensional simulations had steam-oxygen ratios of 3.1:1, 4.3:1, and 6.0:1 at oxygen fluxes of 10.8 to 8.0 scfh/ft/sup 2/. The three-dimensional simulation had a steam-to-oxygen ratio of 3.0:1. Results from the one-dimensional simulations show a reduction in the fuel deposition and oxygen demand as the steam-to-oxygen ratio increases. In conjunction with reduction in fuel deposition is the increase in combustion front velocity and oil yield with increasing steam-to-oxygen ratio. These trends are assumed to be the result of improved displacement efficiency of the steam zone that precedes the pyrolysis and combustion zones in the forward combustion process and suppression of coking by the steam. The effect of combustion front channeling was demonstrated by the three-dimensional simulation. Channeling caused a decrease in process sweep efficiency and oil yield with increased fuel consumption. Product oils from all simulations were significantly improved in quality compared with the original bitumen. The product oils had significantly lower molecular weights, viscosities, and percentage of components boiling above 1000/sup 0/F (538/sup 0/C). 12 refs., 10 figs., 6 tabs.
- Research Organization:
- Western Research Inst., Laramie, WY (USA)
- DOE Contract Number:
- FC21-86MC11076
- OSTI ID:
- 5818866
- Report Number(s):
- DOE/MC/11076-2441; ON: DE88002735
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASPHALT RIDGE DEPOSIT
CHEMICAL PROPERTIES
PHYSICAL PROPERTIES
SAMPLING
BITUMENS
IN-SITU COMBUSTION
BENCH-SCALE EXPERIMENTS
SIMULATION
OIL SANDS
CARBON
CHEMICAL ANALYSIS
CHEMICAL REACTORS
COKE
EXPERIMENTAL DATA
HYDROGEN
NITROGEN
OIL YIELDS
ONE-DIMENSIONAL CALCULATIONS
OXYGEN
PYROLYSIS
SAMPLE PREPARATION
STEAM
STEAM INJECTION
SULFUR
TEMPERATURE MEASUREMENT
THERMOCOUPLES
THREE-DIMENSIONAL CALCULATIONS
UTAH
VISCOSITY
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
DATA
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FEDERAL REGION VIII
FLUID INJECTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
IN-SITU PROCESSING
INFORMATION
MATERIALS
MEASURING INSTRUMENTS
NONMETALS
NORTH AMERICA
NUMERICAL DATA
OIL SAND DEPOSITS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
PROCESSING
TAR
THERMOCHEMICAL PROCESSES
USA
YIELDS
040401* - Oil Shales & Tar Sands- In Situ Methods
True & Modified
040500 - Oil Shales & Tar Sands- Properties & Composition