Pyrolysis and gasification of coal at high temperatures. Quarterly progress report No. 9, September 15, 1989--December 15, 1989

Technical Report · Sun Dec 31 04:00:00 EST 1989

DOI:https://doi.org/10.2172/10123296· OSTI ID:10123296

Zygourakis, K

Coals of different ranks will be pyrolyzed in a microscope hot-stage reactor using inert and reacting atmospheres. The macropore structure oft he 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. 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}/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.

• Research Organization: Rice Univ., Houston, TX (United States). Dept. of Chemical Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-87PC79930
• OSTI ID: 10123296
• Report Number(s): DOE/PC/79930--T7; ON: DE92007930
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404
010409
CHARS
COAL
COAL GASIFICATION
COAL RANK
DEVOLATILIZATION
FRAGMENTATION
GASIFICATION
HEATING RATE
IMAGES
MATHEMATICAL MODELS
MICROSTRUCTURE
NITROGEN
OXYGEN
PARTICLE SIZE
POROSITY
PROGRESS REPORT
PYROLYSIS
PYROLYSIS AND CARBONIZATION
WATER