Pyrolysis and gasification of coal at high temperatures: Quarterly progress report, 3/15/88-6/15/88

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7135032

Zygourakis, K

The effects of pyrolysis heating rate on the micropore structure of chars produced from a non-plastic lignite coal were investigated. Coal particles in the 50--60 mesh size fraction were pyrolyzed in our captive-sample reactor at 0.1, 10 and 1000/degree/C/s/. As before, we characterized the micropore structure of the three chars by analyzing digitized particle cross-sections. This analysis revealed that the large macropores of the lignite chars are mostly elongated ''cracks'' or fissures. Thus, the micropore structure of lignite chars is different than that of chars produced from the plastic Illinois No. 6 coal. The stereological measurements revealed small effects of the pyrolysis heating rate both on the porosity and on the specific micropore surface areas. Several simulations were carried out to investigate the gasification behavior of the three lignite chars. The predicted gasification rate vs. conversion patterns did not exhibit a maximum, as was the case with the Illinois No. 6 chars. 9 figs.

• Research Organization: Rice Univ., Houston, TX (USA). Dept. of Chemical Engineering
• DOE Contract Number: FG22-87PC79930
• OSTI ID: 7135032
• Report Number(s): DOE/PC/79930-T4; ON: DE88015035
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
010409* -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
ATMOSPHERES
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
CONTROLLED ATMOSPHERES
DECOMPOSITION
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
HEATING RATE
KINETICS
MATERIALS
MATHEMATICAL MODELS
MICROSCOPY
POROSITY
PROGRESS REPORT
PYROLYSIS
PYROLYSIS PRODUCTS
REACTION KINETICS
THERMOCHEMICAL PROCESSES