High-temperature pyrolysis mechanisms of coal model compounds

Technical Report · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.2172/7069732· OSTI ID:7069732

Penn, J H; Owens, W H

The degradation of the carboxylic acid group has been examined with respect to potential pretreatment strategies for fossil fuel conversion processes. In one potential pretreatment strategy involving cation exchange of the carboxylic acid group, a series of benzoic acid and stearic acid salts have been chosen to model the tight'' carboxylic acids of immature fossil fuel feedstocks and have been pyrolyzed with an entrained flow reactor. Our preliminary results indicate that Group I and II salts yield primarily the parent acid. Benzoate salts also yield small amounts of benzene while the stearic acid salts give no other detectable products. In two alternative treatment strategies, esterification and anhydride preparation have also been accomplished with these compounds being subjected to the entrained flow reactor conditions. The benzoate esters give a number of products, such as benzaldehyde, benzene, and low MW gases. The formation of these compounds is extremely dependent on pyrolysis conditions and alkoxy chain length. A xenon flashlamp and an entrained flow reactor have been used to heat organic substrates to varying temperatures using different heating rates. Ultrarapid flashlamp pyrolysis (heating rate>10{sup 50}C/s) has been performed. Since the ultrarapid pyrolysis products differ from those observed with traditional heating techniques and differ from the products formed photochemically, the flashlamp pyrolysis products are attributed to high temperature thermal activation.

• Research Organization: West Virginia Univ., Morgantown, WV (United States). Dept. of Chemistry
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FC21-87MC24207
• OSTI ID: 7069732
• Report Number(s): DOE/MC/24207-2994; ON: DE91002075
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CARBOXYLIC ACIDS
PYROLYSIS
COAL
STRUCTURAL MODELS
PYROLYSIS PRODUCTS
BENZOIC ACID
EXPERIMENTAL DATA
HEATING RATE
PROGRESS REPORT
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
INFORMATION
MATERIALS
MONOCARBOXYLIC ACIDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
THERMOCHEMICAL PROCESSES
010409* - Coal
Lignite
& Peat- Pyrolysis & Carbonization- (1987-)