Internally circulating fast fluidized bed flash pyrolysis reactor

Patent · Tue Dec 20 04:00:00 EST 1977

OSTI ID:6612815

Choi, C K

A process and equipment are described for the pyrolysis of solid carbonaceous materials such as oil shale and coal. A carrier gas is introduced to the base of an upward flowing fast fluidized bed. Simultaneously, there is introduced to the base of the bed a particulate source of heat which contacts and pyrolyzes the carbonaceous material. The particulate source of heat is sufficient to raise the carbonaceous material to a pyrolysis temperature of at least 600/sup 0/F. The pyrolysis of the carbonaceous material yields a particulate carbon containing solid residue and a pyrolytic vapor containing hydrocarbons. The fluidized bed is contained in a vertically diposed open duct. The gaseous mixture is separated from the entrained solids mixture, and the hydrocarbons are recovered from the gaseous mixture. The separated entrained solids mixture is cycled back to the pyrolysis reactor. Pyrolysis occurs at temperatures of 600/sup 0/ to 2,000/sup 0/F. Short reaction times and low temperatures in the fast fluidized bed enhance formation of middle distillate hydrocarbons. (34 claims)

• Assignee: Accidental Petroleum Corp
• Patent Number(s): US 4064018
• OSTI ID: 6612815
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010406* -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COMBUSTORS
DECOMPOSITION
DESIGN
ENERGY SOURCES
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUELS
MATERIALS
OIL SHALES
PYROLYSIS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES