Mathematical model for a fluidized-bed coal gasifier. Final report August 1980-August 1983
Technical Report
·
OSTI ID:6524904
The report gives results of gasifying four fuels--a devolatilized Kentucky bituminous coal, a New Mexico subbituminous coal, a North Carolina peat, and a Texas lignite--with steam and oxygen in a pilot-scale fluidized-bed reactor. Experimental results were used to provide an evaluation of mathematical models developed for the gasifier. A simple three-stage gasifier model and a two-phase bubbling-bed model were developed. Model options include allowance for a jetting region at the gas inlet of the bed and elutriation of fines. Gasification reactions in both models are described by Johnson kinetics. The models were applied to the gasification of the devolatilized Kentucky bituminous coal and the New Mexico subbituminous coal. Parameter optimizations were performed with each model for each feedstock. The main difference in the optimal values was in char reactivity, for which that of the New Mexico coal was roughly an order of magnitude greater than that for the Kentucky char. Using the optimal values, the models were applied to all experimental runs with these two coals. The resulting model predictions and experimental results showed reasonably good agreement in all cases.
- Research Organization:
- North Carolina State Univ., Raleigh (USA). Dept. of Chemical Engineering
- OSTI ID:
- 6524904
- Report Number(s):
- PB-84-209469
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010400* -- Coal
Lignite
& Peat-- Processing
AIR POLLUTION CONTROL
ALKANES
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COMBUSTION PRODUCTS
CONTROL
DESIGN
ELEMENTS
ENERGY SOURCES
FLUIDIZED BED
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GASIFICATION
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INDUSTRIAL WASTES
LIGNITE
MATERIALS
MATHEMATICAL MODELS
METHANE
NONMETALS
ORGANIC COMPOUNDS
ORGANIC MATTER
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLES
PEAT
PERFORMANCE
PILOT PLANTS
POLLUTION CONTROL
STEAM
SUBBITUMINOUS COAL
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
WASTES
010400* -- Coal
Lignite
& Peat-- Processing
AIR POLLUTION CONTROL
ALKANES
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COMBUSTION PRODUCTS
CONTROL
DESIGN
ELEMENTS
ENERGY SOURCES
FLUIDIZED BED
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GASIFICATION
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INDUSTRIAL WASTES
LIGNITE
MATERIALS
MATHEMATICAL MODELS
METHANE
NONMETALS
ORGANIC COMPOUNDS
ORGANIC MATTER
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLES
PEAT
PERFORMANCE
PILOT PLANTS
POLLUTION CONTROL
STEAM
SUBBITUMINOUS COAL
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
WASTES