Kinetics of carboxylic acid formation in the combustion of alcohols. Interim report, 4 September 1986-1 September 1987
Technical Report
·
OSTI ID:6231953
Several studies have shown that low-temperature operation of spark-ignition engines on methanol fuel results in unusually high ring and cylinder bore wear. It has been found that the wear is caused by formic acid and peroxide formed in the low-temperature combustion of methanol. Bench studies have shown that combustion residues are formed when shallow pools of alcohols are burned. The residues were found to contain substantial concentrations of aldehydes, carboxylic acids, and peroxides. The objective of this study was to measure rates and to determine the kinetics of formation of carboxylic acids and peroxides observed in residues formed by burning shallow pools of liquid alcohols. An examination of the literature suggested strongly that carboxylic acid formation in alcohol combustion was probably caused by the reaction of hydrogen peroxide with aldehydes. The kinetics of the reactions of hydrogen peroxide with formaldehyde, deuterated formaldehyde acetaldehyde, and chloral were examined in aqueous solution. Rate constants and equilibrium constants are given in the report for the respective decompositions and formations of the methylenehydroxyperoxide-type intermediates proposed to exist in the reactions of hydrogen peroxide with aldehydes.
- Research Organization:
- Southwest Research Inst., San Antonio, TX (USA). Belvoir Fuels and Lubricants Research Facility
- OSTI ID:
- 6231953
- Report Number(s):
- AD-A-200961/1/XAB; BLRF-254
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330800* -- Emission Control-- Alternative Fuels
ALCOHOL FUELS
ALCOHOLS
ALDEHYDES
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
COMBUSTION
CORROSION
DECOMPOSITION
DOCUMENT TYPES
ENGINES
FLUIDS
FORMALDEHYDE
FORMIC ACID
FUELS
HEAT ENGINES
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXY COMPOUNDS
INTERNAL COMBUSTION ENGINES
KINETICS
LIQUIDS
LOW TEMPERATURE
MONOCARBOXYLIC ACIDS
OPERATION
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PEROXIDES
PROGRESS REPORT
REACTION KINETICS
RESIDUES
SPARK IGNITION ENGINES
SYNTHETIC FUELS
THERMOCHEMICAL PROCESSES
WATER
WEAR
330800* -- Emission Control-- Alternative Fuels
ALCOHOL FUELS
ALCOHOLS
ALDEHYDES
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
COMBUSTION
CORROSION
DECOMPOSITION
DOCUMENT TYPES
ENGINES
FLUIDS
FORMALDEHYDE
FORMIC ACID
FUELS
HEAT ENGINES
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXY COMPOUNDS
INTERNAL COMBUSTION ENGINES
KINETICS
LIQUIDS
LOW TEMPERATURE
MONOCARBOXYLIC ACIDS
OPERATION
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PEROXIDES
PROGRESS REPORT
REACTION KINETICS
RESIDUES
SPARK IGNITION ENGINES
SYNTHETIC FUELS
THERMOCHEMICAL PROCESSES
WATER
WEAR