Mixing and gasification of coal in entrained flow systems. Quarterly technical progress report No. 2, July 1--September 30, 1977
This report summarizes work accomplished during the second quarter of a study to investigate mixing and gasification of coal in entrained flow systems. Eight additional cold-flow tests were conducted using an intermediate-size test chamber. The results verify that mixing chamber size is a secondary factor in controlling gas-particle mixing rates. Modification of this facility to permit nonparallel injection with recirculation was initiated. The basic gasifier facility was completed and gas flames were ignited and stabilized on several occasions. Difficulties in obtaining uniform coal feed rates were encountered and alteration of the coal feeder was initiated to resolve these difficulties. Design and fabrication of a prototype of the sample train for removing gas-coal samples from the gasifier was also completed and is being tested. It was shown that water does not alter coal or char samples but does dissolve some of the soluble ingredients in ash. Application of the one-dimensional computer code to entrained gasifiers was initiated. Two computations for the laboratory gasifier illustrated the importance of the mixing process and showed that char-CO/sub 2/ reactions are slow compared to devolatilization and oxidation of the volatiles. Integration of general gasifier components into the computer model was continued. The technical basis of the model was improved by accounting for micromixing processes. Sample calculations were completed for the laboratory gasifier. It is anticipated that test work for coal-steam-oxygen flames will be initiated during the next report period.
- Research Organization:
- Brigham Young Univ., Provo, Utah (USA). Dept. of Chemical Engineering
- OSTI ID:
- 6890380
- Report Number(s):
- FE-2666-2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mixing and gasification of coal in entrained flow systems. Quarterly technical progress report No. 3, October 1--December 31, 1977
Mixing and gasification of coal entrained flow systems. Quarterly technical progress report, 1 January 1976--31 March 1976
Related Subjects
010404* -- Coal
Lignite
& Peat-- Gasification
BENCH-SCALE EXPERIMENTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL GASIFICATION
DEVOLATILIZATION
ENTRAINMENT
GASIFICATION
MATHEMATICAL MODELS
MIXING
ONE-DIMENSIONAL CALCULATIONS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
TEST FACILITIES
VOLATILE MATTER