Low temperature pyrolysis of coal or oil shale in the presence of calcium compounds
A gasification method for the production of liquid and gaseous products from carbonaceous materials, is described consisting of the steps of heating at a rate in the range of about 5/sup 0/ to 50/sup 0/C per minute a particulate mixture consisting essentially of carbonaceous material selected from coal or oil shale in an average particle size range of about 8 to 100 mesh and about 5 to 25 wt.% of a calcium compound of an average particle size of less than about 325 mesh to a pyrolysis temperature in the range of about 450/sup 0/ to 700/sup 0/C, maintaining the mixture at a temperature within the range for a duration of about 10 to 60 minutes, and removing liquid and gaseous products generated during the pyrolysis of the carbonaceous material.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4747938
- OSTI ID:
- 6851255
- Resource Relation:
- Patent File Date: Filed date 17 Apr 1986
- Country of Publication:
- United States
- Language:
- English
Similar Records
Low temperature pyrolysis of coal or oil shale in the presence of calcium compounds
Process for the preparation of a carbonaceous-derived solid fuel product. [Pyrolysis tar in a water in tar emulsion coated on char particles at temperature of 50-600/sup 0/C]
Related Subjects
04 OIL SHALES AND TAR SANDS
COAL
PYROLYSIS
OIL SHALES
CALCIUM COMPOUNDS
COAL GASIFICATION
COAL LIQUIDS
HEATING
HIGH TEMPERATURE
PARTICULATES
ALKALINE EARTH METAL COMPOUNDS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASIFICATION
LIQUIDS
MATERIALS
PARTICLES
THERMOCHEMICAL PROCESSES
010409* - Coal
Lignite
& Peat- Pyrolysis & Carbonization- (1987-)
040402 - Oil Shales & Tar Sands- Surface Methods