Char gasification and ash vaporization in single-stage and two-stage coal-fired MHD combustors
Conference
·
OSTI ID:5301046
A computer model is presented for the simulation of coal combustion under conditions pertinent to single-stage and two-stage open-cycle MHD systems. The vaporization of mineral constituents is described by an external-diffusion controlled model, using empirical data for the effective vapor pressures. Chemical kinetics are included for the reactions of char with O/sub 2/, CO/sub 2/, H/sub 2/O, O, and OH. A parametric study of the effects of pressure, fuel/air equivalence ratio, and oxidant preheat temperature is used to illustrate tradeoffs between coal combustion efficiency, ash vaporization, and combustor residence time.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge, MA (USA). Dept. of Chemical Engineering
- Sponsoring Organization:
- Not Available; USDOE
- DOE Contract Number:
- AC01-79ET15518
- OSTI ID:
- 5301046
- Report Number(s):
- CONF-800617-4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
30 DIRECT ENERGY CONVERSION
300103* -- MHD Generators-- Materials
Components
& Auxiliaries
ASHES
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
COAL
COAL-FIRED MHD GENERATORS
COMBUSTION
COMBUSTORS
DIRECT ENERGY CONVERTERS
ENERGY SOURCES
ENRICHMENT
EVAPORATION
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
GASIFICATION
MATHEMATICAL MODELS
MHD GENERATORS
OXIDATION
OXYGEN ENRICHMENT
PARAMETRIC ANALYSIS
PERFORMANCE
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
PYROLYSIS PRODUCTS
RESIDUES
SEED-SLAG INTERACTIONS
SIMULATION
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
014000 -- Coal
Lignite
& Peat-- Combustion
30 DIRECT ENERGY CONVERSION
300103* -- MHD Generators-- Materials
Components
& Auxiliaries
ASHES
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
COAL
COAL-FIRED MHD GENERATORS
COMBUSTION
COMBUSTORS
DIRECT ENERGY CONVERTERS
ENERGY SOURCES
ENRICHMENT
EVAPORATION
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
GASIFICATION
MATHEMATICAL MODELS
MHD GENERATORS
OXIDATION
OXYGEN ENRICHMENT
PARAMETRIC ANALYSIS
PERFORMANCE
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
PYROLYSIS PRODUCTS
RESIDUES
SEED-SLAG INTERACTIONS
SIMULATION
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES