Retorting hydrocarbonaceous solids

Patent · Tue Aug 19 04:00:00 EDT 1980

OSTI ID:6935900

Styring, R E

Mined, crushed hydrocarbonaceous solids are pyrolyzed in a retort with a gas containing hydrocarbons. The gas is heated to a suitable temperature of at least 600/sup 0/F. Thereafter, a relatively small amount of oxygen is added to the heated gas outside the retort. The resulting mixture is then flowed into the retort. The amount of oxygen is theoretically sufficient to raise the temperature of the heated gas at least 100/sup 0/F., but is less than the amount theoretically sufficient to react with all of the hydrocarbons in the heated gas. The process is applicable to any type of retort wherein a retort recycle gas containing hydrocarbons is heated outside the retort and is then injected into the retort to provide a source of heat for pyrolyzing hydrocarbonaceous solids in the retort. The advantages of this modified indirect heated retorting method depends on the type of retort. This method provides added control over carbonate decomposition, coking or carbonization of the gas during heating, total gas flow, process variations, and the heat requirements and thermal efficiency of the process.

• Assignee: Atlantic Richfield Co
• Patent Number(s): US 4218304
• OSTI ID: 6935900
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010406* -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
04 OIL SHALES AND TAR SANDS
040402 -- Oil Shales & Tar Sands-- Surface Methods
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HEATING
HIGH TEMPERATURE
MATERIALS
NONMETALS
OIL SANDS
OIL SHALES
OXYGEN
PYROLYSIS
RETORTING
THERMOCHEMICAL PROCESSES