Preignition volatile yields as related to coal characteristics. Final technical report, 15 September 1980-15 November 1981

Technical Report · Thu Oct 01 04:00:00 EDT 1981

OSTI ID:5567488

Neoh, K G; Annamalai, K; Gannon, R E

The objective of this program is to relate preignition volatile yields from pulverized coal under combustion heating conditions to readily measured coal characteristics such as proximate and ultimate analyses, reflectance, internal surface area and petrographic composition. Thirteen coals ranging in rank from lignite to anthracite were tested at two temperatures between 1500/sup 0/K and 2500/sup 0/K. Results from these coals showed that the volatile yields obtained under high-heating rate and temperatures are generally higher than the proximate yield. A positive correlation between the high-temperature yield and the carbon content in the coal was obtained, and the effect of the maceral content was found to be secondary to the chemical composition. With the exception of the lignite and sub-bituminous coals, the heating value of the volatiles is equal to or higher than that of the original coal. Investigation of particle size effects were carried out on three of the thirteen coals and the results showed particle size effects to be insignificant in the size range tested. Modeling results from the AERL coal combustion code indicate that volatile yield strongly affects burner design. Predictions obtained from the model are consistent with current burner technology and can serve as a basis for design improvements.

• Research Organization: Avco-Everett Research Lab., Inc., Everett, MA (USA)
• DOE Contract Number: AC22-80PC30290
• OSTI ID: 5567488
• Report Number(s): DOE/PC/30290-T4; ON: DE82005706
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010406* -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
BURNERS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COMBUSTION
COMPARATIVE EVALUATIONS
DATA
DESIGN
DEVOLATILIZATION
ENERGY SOURCES
EXPERIMENTAL DATA
FLAMES
FOSSIL FUELS
FUELS
HEATING RATE
INFORMATION
MACERALS
MATERIALS
MATHEMATICAL MODELS
MATTER
NUMERICAL DATA
OXIDATION
PARTICLE SIZE
PETROGRAPHY
SIZE
STABILITY
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
VOLATILE MATTER
YIELDS