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Enriching off gas from oil shale retort

Patent ·
OSTI ID:6555344
;

A method whereby liquid and gaseous products are recovered from oil shale in an in situ oil shale retort is discussed. A combustion zone is advanced by establishing a combustion zone in the oil shale and introducing a gaseous feed mixture into the zone in the direction the zone is to be advanced through the oil shale retort. The gaseous feed mixture consists of an oxygen supplying gas and water vapor and is introduced into the combustion zone at a rate sufficient to maintain the temperature in the combustion zone within a predetermined range of temperatures above the retorting temperature of the oil shale in the in situ oil shale retort. The introduction of the gaseous feed mixture into the combustion zone generates combustion product gases which together with the portion of the gaseous feed mixture which does not take part in the combustion process, is called flue gas. The flue gas passes through the oil shale on the advancing side of the combustion zone, thereby retorting the oil shale to produce liquid and gaseous products. The liquid product and the retort off gas, which consists of gaseous product and flue gas, are withdrawn from the in situ oil shale retort at a point on the advancing side of the retorting zone. (47 claims) (Continuation-in-part of U.S. Appl. 492,289, f. 7/26/74)

Assignee:
Occidental Oil Shale Inc.
Patent Number(s):
US 4036299
OSTI ID:
6555344
Country of Publication:
United States
Language:
English

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Related Subjects

04 OIL SHALES AND TAR SANDS
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FLUE GAS
FLUIDS
FOSSIL FUELS
FUELS
GASEOUS WASTES
GASES
IN-SITU PROCESSING
IN-SITU RETORTING
LIQUIDS
MATERIALS
MINERAL OILS
NONMETALS
OFF-GAS SYSTEMS
OIL SHALES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
OXYGEN
PROCESSING
RECOVERY
RETORTING
SHALE GAS
SHALE OIL
THERMOCHEMICAL PROCESSES
VAPORS
WASTES
WATER VAPOR