Modeling and experimental studies on devolatilization yields from a bituminous coal
Journal Article
·
· Ind. Eng. Chem. Res.; (United States)
A laboratory-scale fixed bed reactor was set up to simulate conditions existing in the devolatilization zone of an air-blow, Lurgi-type, fixed bed coal gasifier. The effects of temperature (350-550/sup 0/C) and particle size (1-9 mm) on the devolatilization behavior of a bituminous coal in such a reactor were studied. The feed gas composition was chosen to approximate that entering the devolatilization zone from the gasification zone below in a commercial-scale fixed bed reactor. Similar studies were also carried out on a thermogravimetric analysis (TGA) reactor, for purposes of comparison. A semitheoretical model, describing the transport of the tar and gas species to the surface of the particle, and the subsequent evolution of these, is developed. The model takes into account the softening characteristics of bituminous coals upon heating. The volatiles yield predicted by the model is next compared with the experimental results, and the agreement appears quite good.
- Research Organization:
- Dept. of Chemical Engineering, Washington State Univ., Pullman, WA (US)
- OSTI ID:
- 7042844
- Journal Information:
- Ind. Eng. Chem. Res.; (United States), Journal Name: Ind. Eng. Chem. Res.; (United States) Vol. 26:11; ISSN IECRE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COMBUSTION KINETICS
DEVOLATILIZATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
GRAVIMETRIC ANALYSIS
KINETICS
LURGI PROCESS
MATERIALS
MATHEMATICAL MODELS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SIMULATION
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
THERMODYNAMICS
YIELDS
010404* -- Coal
Lignite
& Peat-- Gasification
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COMBUSTION KINETICS
DEVOLATILIZATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
GRAVIMETRIC ANALYSIS
KINETICS
LURGI PROCESS
MATERIALS
MATHEMATICAL MODELS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SIMULATION
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
THERMODYNAMICS
YIELDS