Recovery of fuel from oil shale
Patent
·
OSTI ID:5357688
Raw shale is supplied to a pyrolyzer where it is pyrolyzed by fuel gas and hot spent shale derived from a gasifier. Typically, the raw shale is Eastern U.S. shale and the pyrolyzer includes a fluidized bed. The pyrolyzed shale having given up its oil and volatile hydrocarbons, rises to the top of the fluidized bed of raw shale where it is transferred to the gasifier. Oxygen and steam are supplied to the gasifier. This composite gas reacts with the carbon of the pyrolyzed shale in a fluidized bed to produce synthesis or fuel gas. The oxygen is supplied in such quantities as not to react completely with the carbon in the pyrolyzed shale. The steam reacts with the excess of carbon. Predominantly hydrogen and carbon monoxide are produced; in addition there is a smaller quantity of carbon dioxide and methane. This hot fuel gas is transferred to the pyrolyzer. In addition, hot spent shale is transferred to the pyrolyzer. The hot fuel gas fluidizes the raw shale in the pyrolyzer. The hot gas and the hot spent shale heat the raw shale separating the shale oil and produce gas including volatile hydrocarbons. The oil is condensed and collected, the fuel gas is collected for utilization in the above process and also for other purposes.
- Assignee:
- Westinghouse Electric Corp.
- Patent Number(s):
- US 4412910
- OSTI ID:
- 5357688
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
04 OIL SHALES AND TAR SANDS
040402* -- Oil Shales & Tar Sands-- Surface Methods
ALKANES
BITUMINOUS MATERIALS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FLUIDIZED BED
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROCARBONS
HYDROGEN
MATERIALS
METHANE
MINERAL OILS
NONMETALS
OIL SHALES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PYROLYSIS
RECOVERY
SHALE OIL
SPENT SHALES
STEAM
THERMOCHEMICAL PROCESSES
040402* -- Oil Shales & Tar Sands-- Surface Methods
ALKANES
BITUMINOUS MATERIALS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FLUIDIZED BED
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROCARBONS
HYDROGEN
MATERIALS
METHANE
MINERAL OILS
NONMETALS
OIL SHALES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PYROLYSIS
RECOVERY
SHALE OIL
SPENT SHALES
STEAM
THERMOCHEMICAL PROCESSES