Investigation of vaporization and devolatilization of coal/water mixtures. Fifth quarterly report, May 1, 1983-July 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. The program is currently collecting data in an entrained flow coal reactor which has a fixed position, coal/water slurry spray injector and a movable product extractor. This reactor is being used to study the vaporization and pyrolysis of coal/water slurries. FT-IR is used for the analysis of the product gases, tars and chars to determine species evolution kinetics and kinetics of secondary reactions such as steam-char reactions, cracking, soot formation, char gasification, cenophere formation and particle swelling, and char reactivity. Temperature measurements were made along the center line of the test section of the reactor by removing the collection system and inserting a suction pyrometer through the bottom of the reactor. The temperature profile is quite constant in the top 40 cm of the reactor, but then drops off about 150/sup 0/ in the lower 20 cm. Data for the Pittsburgh Seam coal/water slurry were collected at furnace temperatures of 1100/sup 0/C and 1300/sup 0/C. The general behavior of the various species indicates more conversion of aliphatic to CO and CO/sub 2/, compared to dry coal pyrolysis. Chars from slurry pyrolyses at 1100/sup 0/C and 1300/sup 0/C show substantial agglomeration, with the 1300/sup 0/C char showing the largest effect. The char particles from the water coinjection case appear to be individual coal particles which have swelled into cenospheres, whereas with the slurry there are clearly many coal particles.
- Research Organization:
- Advanced Fuel Research, Inc., East Hartford, CT (USA)
- DOE Contract Number:
- AC22-82PC50254
- OSTI ID:
- 5542969
- Report Number(s):
- DOE/PC/50254-T5; ON: DE84001217
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation of vaporization and devolatilization of coal/water mixtures. Seventh quarterly report, November 1, 1983-January 31, 1984
Investigation of vaporization and devolatilization of coal/water mixtures. Third quarterly report, October 19, 1982-January 31, 1983
Related Subjects
014000* -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
DATA
DECOMPOSITION
DEVOLATILIZATION
DISPERSIONS
ENERGY SOURCES
EVAPORATION
EXPERIMENTAL DATA
FOSSIL FUELS
FOURIER TRANSFORMATION
FUEL SLURRIES
FUELS
HYDROGEN COMPOUNDS
INFORMATION
INFRARED SPECTRA
INTEGRAL TRANSFORMATIONS
MATERIALS
MIXTURES
NUMERICAL DATA
OXIDATION
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PYROLYSIS
SLURRIES
SPECTRA
SPRAYS
SUSPENSIONS
THERMOCHEMICAL PROCESSES
TRANSFORMATIONS
WATER