Pyrolysis and gasification of coal at high temperatures
Research continued on pyrolysis and gasification of coal. Tasks include: Effects of pyrolysis conditions on macropore structure. Coals of different ranks will be pyrolyzed in a microscope hot-stage reactor using inert and reacting atmospheres. The macropore structure of the produced chars will be characterized using video microscopy and digital image processing techniques to obtain pore size distributions. Comparative studies will quantify the effect of pyrolysis conditions (heating rates, final heat treatment temperatures, particle size and inert or reacting atmosphere) on the pore structure of the devolatilized chars; 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. Constant temperature and programmed-temperature experiments in a TGA will be used for these studies. 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 mathematical modeling and model validation. 6 figs.
- Research Organization:
- Rice Univ., Houston, TX (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-87PC79930
- OSTI ID:
- 5262939
- Report Number(s):
- DOE/PC/79930-T6; ON: DE91018325
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pyrolysis and gasification of coal at high temperatures. Quarterly progress report No. 5, September 15, 1988--December 15, 1988
Pyrolysis and gasification of coal at high temperatures. Quarterly progress report No. 8, June 15, 1989--September 15, 1989
Related Subjects
CHARS
POROSITY
MATHEMATICAL MODELS
PYROLYSIS
CHEMICAL REACTION KINETICS
COAL GASIFICATION
MICROSCOPY
PROGRESS REPORT
CHEMICAL REACTIONS
DECOMPOSITION
DOCUMENT TYPES
GASIFICATION
KINETICS
PYROLYSIS PRODUCTS
REACTION KINETICS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
010409 - Coal
Lignite
& Peat- Pyrolysis & Carbonization- (1987-)