Integrated coking-gasification process with mitigation of bogging and slagging

Patent · Tue Mar 10 04:00:00 EST 1992

OSTI ID:5290610

Bearden, R Jr; Chen, T J; Olmstead, W N

This patent describes improvement in a fluid coking-gasification process for converting heavy hydrocarbonaceous materials to lower boiling products. It comprises introducing a heavy hydrocarbonaceous chargestock into a coking zone comprised of a bed of fluidized solids maintained at fluid coking conditions, including a temperature from about 850{degrees} to 1200{degrees} F. and a total pressure of up to about 150 psig, to produce a vapor phase product including normally liquid hydrocarbons, and coke, the coke depositing on the fluidized solids; introducing a portion of the solids with coke deposited thereon into a heating zone comprised of a fluidized bed of solid particles and operated at a temperature greater than the coking zone; and recycling a portion of the heated solids from the heating zone to the coking zone; introducing a second portion of the heated solids from the heating zone to a gasification zone comprised of a fluidized bed of solid particles and maintained at a temperature greater than the heating zone; and reacting the second portion of heated solids in the gasification zone with steam and an oxygen-containing gas; the improvement comprises using an effective amount of calcium silicate to prevent bogging and/or slagging, wherein the calcium silicate is introduced into the process by one or more procedures selected from: mixing it with the heavy hydrocarbonaceous chargestock prior to introduction into the coking zone; adding it directly into the gasification zone; and mixing it with the portion of heated solids passing from the heating zone to the gasification zone.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ (United States)
• Patent Number(s): A; US 5094737
• Application Number: PPN: US 7-591335
• OSTI ID: 5290610
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
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Lignite
& Peat-- Gasification
010408 -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
010409* -- Coal
Lignite
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CARBONACEOUS MATERIALS
COAL
COAL GASIFICATION
COKING PLANTS
CONVERSION
ENERGY CONVERSION
ENERGY SOURCES
EVALUATION
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
GASIFICATION
HYDROCARBONS
INDUSTRIAL PLANTS
LIQUID FUELS
LURGI PROCESS
MATERIALS
ORGANIC COMPOUNDS
THERMOCHEMICAL PROCESSES
VISCOSITY