Isothermal pyrolysis and combustion of oil shale in steam

Conference · Sun Jan 01 04:00:00 EST 1989 · Oil Shale Symposium Proceedings; (USA)

OSTI ID:6504080

Coburn, T T; Taylor, R W; Morris, C J ^[1]

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1. Lawrence Livermore National Lab., CA (USA)

In a solid-recycle retort, the burnt shale that serves as a heat carrier promotes coke formation. Steam inhibits coking reactions and has long been used for this purpose in hydrocarbon crackers. As part of a search for practical methods to minimize oil loss due to coking, the authors have studied steam-moderated flash pyrolysis of Green River and Devonian oil shales. Volatile hydrocarbon production from a laboratory fluidized bed was monitored by using a high-temperature method that largely eliminated extraneous effects due to adsorption/desorption of oil vapors. Kinetics of oil shale flash pyrolysis in steam and in argon were comparable. The oil-plus-gas yield improved by 10 {plus minus} 5% with wet (50% steam) rather than dry fluidizing gas; both raw and carbonate-free (acid-leached) shales have been investigated. The fraction of carbon released by steam gasification of char is shown to be insignificant.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6504080
• Report Number(s): CONF-8904193--
• Conference Information: Journal Name: Oil Shale Symposium Proceedings; (USA) Journal Volume: 22
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
040403 -- Oil Shales & Tar Sands-- Refining
BITUMINOUS MATERIALS
CARBON
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COKING
DATA
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
ENHANCED RECOVERY
EXPERIMENTAL DATA
FLUID INJECTION
FLUIDIZED BEDS
FLUIDS
FOSSIL FUELS
FUELS
GASES
HIGH TEMPERATURE
HYDROCARBONS
IN-SITU PROCESSING
IN-SITU RETORTING
INFORMATION
ISOTHERMAL PROCESSES
KINETICS
MATERIALS
NONMETALS
NUMERICAL DATA
OIL SHALES
ORGANIC COMPOUNDS
PROCESSING
PRODUCTION
PYROLYSIS
REACTION KINETICS
RECOVERY
RETORTING
STEAM INJECTION
THERMOCHEMICAL PROCESSES
VAPORS
WATER VAPOR