Pyrolysis and gasification of coal at high temperatures: Quarterly progress report No. 1, September 15-December 15, 1987
Technical Report
·
OSTI ID:5574440
Research continued in three areas: (1) Effects of pyrolysis conditions on macropore structure - Coals of different ranks were pyrolyzed. The macropore structure of the produced chars were characterized using video microscopy and digital image processing techniques to obtain pore size distributions. The effect of pyrolysis conditions on the pore structure of the devolatilized chars will be evaluated; (2) Gasification under strong intraparticle diffusional limitations - The devolatilized chars will be gasified in the regime of strong intraparticle diffusional limitations using O/sub 2//N/sub 2/ and O/sub 2//H/sub 2/O/N/sub 2/ mixtures. Additional gasification experiments performed in the hot-stage reactor will be videotaped and selected images will be analyzed to obtain quantitative data on particle shrinkage and fragmentation; and (3) Mathematical modeling and model validation - Discrete mathematical models will be developed and validated using the experimental gasification data. Structural properties of the unreacted chars will be used to generate computational grids simulating the pore structure of the solid. Simulations will then provide the evolution of observed reaction rates with conversion. 14 figs., 1 tab.
- Research Organization:
- Rice Univ., Houston, TX (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- FG22-87PC79930
- OSTI ID:
- 5574440
- Report Number(s):
- DOE/PC/79930-T1; ON: DE88004011
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
010600* -- Coal
Lignite
& Peat-- Properties & Composition
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
COAL RANK
COMPUTERIZED SIMULATION
CRYSTAL STRUCTURE
DECOMPOSITION
DOCUMENT TYPES
ENERGY SOURCES
EROSION
FEDERAL REGION V
FOSSIL FUELS
FRAGMENTATION
FUELS
GASIFICATION
HEAT TREATMENTS
ILLINOIS
IMAGES
MATERIALS
MATHEMATICAL MODELS
MICROSTRUCTURE
MOLECULAR STRUCTURE
NORTH AMERICA
PARTICLES
POROSITY
PROGRESS REPORT
PYROLYSIS
PYROLYSIS PRODUCTS
SIMULATION
SURFACE AREA
SURFACE PROPERTIES
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
USA
010404 -- Coal
Lignite
& Peat-- Gasification
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
010600* -- Coal
Lignite
& Peat-- Properties & Composition
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
COAL RANK
COMPUTERIZED SIMULATION
CRYSTAL STRUCTURE
DECOMPOSITION
DOCUMENT TYPES
ENERGY SOURCES
EROSION
FEDERAL REGION V
FOSSIL FUELS
FRAGMENTATION
FUELS
GASIFICATION
HEAT TREATMENTS
ILLINOIS
IMAGES
MATERIALS
MATHEMATICAL MODELS
MICROSTRUCTURE
MOLECULAR STRUCTURE
NORTH AMERICA
PARTICLES
POROSITY
PROGRESS REPORT
PYROLYSIS
PYROLYSIS PRODUCTS
SIMULATION
SURFACE AREA
SURFACE PROPERTIES
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
USA