Investigation of vaporization and devolatilization of coal/water mixtures. Third quarterly report, October 19, 1982-January 31, 1983
The objective of this program is to develop the capabilities to predict the vaporization and devolatilization behavior of coal/water mixtures under conditions appropriate for spray combustion. In investigating the behavior of coal/water slurries, particular attention will be paid to the conditions which affect the physical properties of the char such as reactivity, swelling, and ash distributions. These are the key properties for evaluating the combustion of slurries in burners designed for oil. The new reactor has been completed and operated successfully (without coal) up to 1200/sup 0/C to verify its thermal behavior. Pyrolysis data were obtained at 800/sup 0/C in the old entrained-flow reactor for a North Dakota lignite with natural moisture content of 30 wt %. These data are compared with similar data obtained previously on the same coal, dried. Data were also obtained on the Pittsburgh Seam coal at 1100/sup 0/C with CO coinjection to help understand the heating rate effects observed for this coal in the second quarter. Both the 800/sup 0/C lignite data and the 1100/sup 0/C Pittsburgh data are compared with the predictions of the AFR pyrolysis model. Preliminary simulations are presented on the heating rate of coal/water droplets because of the significance of heating rate on swelling and char reactivity.
- Research Organization:
- Advanced Fuel Research, Inc., East Hartford, CT (USA)
- DOE Contract Number:
- AC22-82PC50254
- OSTI ID:
- 6473116
- Report Number(s):
- DOE/PC/50254-T3; ON: DE83009302
- Resource Relation:
- Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation of vaporization and devolatilization of coal/water mixtures. Second quarterly report, July 20, 1982-October 19, 1982
Investigation of vaporization and devolatilization of coal/water mixtures. Sixth quarterly report, August 1-October 31, 1983
Related Subjects
CHARS
CHEMICAL REACTION KINETICS
COAL
DEVOLATILIZATION
PYROLYSIS
FUEL SLURRIES
SPRAYS
MATHEMATICAL MODELS
WATER
EVAPORATION
CHEMICAL REACTORS
ENTRAINMENT
EXPERIMENTAL DATA
HEATING RATE
MIXTURES
SWELLING
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
INFORMATION
KINETICS
MATERIALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PYROLYSIS PRODUCTS
REACTION KINETICS
SLURRIES
SUSPENSIONS
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion