Oxidation/gasification of carbon residue on retorted oil shale. Final report

Technical Report · Mon Jan 16 00:00:00 EST 1984

DOI:https://doi.org/10.2172/5156728· OSTI ID:5156728

Thomson, W. J.

Studies of the oxidation and gasification of oil shale char were extended to an investigation of the effects of mineral catalysis. Six shales with differing mineral compositions were studied, including samples from the saline zone in the Western Colorado and from the Antrim shales of Michigan. Oxidation kinetics data, corrected for mass transfer effects, were compared for all six samples. A high assay shale from Utah and a sample from the saline zone were found to have the highest oxidation rates. By examining the data for shales which were water leached and thermally pretreated, it was concluded that both NaO and CaO act as oxidation catalysts. However, as a result of mineral decomposition experiments conducted with a sample from the C-a lease tract, it appears as though the ankeritic dolomite fraction will not decompose as long as there is a minimal CO/sub 2/ over pressure. Rather, low temperature silication reactions appear to take place once the temperature exceeds 925/sup 0/K. An extensive evaluation was also completed for the gasification of an Antrim shale from Michigan. Both the rates of CO/sub 2/ and steam gasification of the char were found to be markedly lower than that observed for a shale sample from the Parachute Creek member in Colorado. However, unlike the Colorado shale, the make gas resulting from the steam gasification of the Antrim shale produced nearly equal quantities of CO and CO/sub 2/. Thus, despite the high concentration of iron in the Antrim shale, the water gas shift reaction is not catalyzed nearly to the same extent as in western shales.

• Research Organization: Washington State Univ., Pullman (USA). Dept. of Chemical Engineering
• DOE Contract Number: AT20-81LC10650
• OSTI ID: 5156728
• Report Number(s): DOE/LC/10650-T1; ON: DE84006251
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
CHARS
GASIFICATION
OXIDATION
SPENT SHALES
ANKERITE
BLACK SHALES
CALCIUM
CARBON DIOXIDE
CATALYSIS
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
HIGH TEMPERATURE
MINERALS
OIL SHALES
SHIFT PROCESSES
SODIUM OXIDES
STEAM
VERY HIGH TEMPERATURE
WATER GAS PROCESSES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
BITUMINOUS MATERIALS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHATTANOOGA FORMATION
CHEMICAL REACTIONS
DATA
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC FORMATIONS
INFORMATION
IRON CARBONATES
IRON COMPOUNDS
KINETICS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MANGANESE CARBONATES
MANGANESE COMPOUNDS
MATERIALS
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
REACTION KINETICS
SODIUM COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
040500* - Oil Shales & Tar Sands- Properties & Composition
040402 - Oil Shales & Tar Sands- Surface Methods