Control of Soot Formation

The personnel, publications and important research results of the three year grant on the control of soot formation are presented in this final report. Systematic probing of the ethene diffusion flame at various N2/fuel dilution ratios using thermophoretic sampling has revealed the variation of heig...

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Bibliographic Details
Main Author: Dobbins, Richard A
Format: Report
Language:English
Subjects:
AGGREGATES(MATERIALS)
Atomic and Molecular Physics and Spectroscopy
CARBON
CARBONACEOUS
CARBONIZATION
CHEMISTRY
Combustion and Ignition
COMPUTATIONS
CONTROL
CONVERSION
DILUTION
ETHENE
FLAMES
FORMATION
FUELS
HEIGHT
Inorganic Chemistry
LASERS
MASS SPECTROMETERS
MATERIALS
MICROPROBES
NITROGEN
PAH(POLYCYCLIC AROMATIC HYDROCARBONS)
PARTICLES
Physical Chemistry
PRECURSORS
RATIOS
SAMPLING
SOOT
STABILOMERS
THERMODYNAMICS
THERMOPHORETIC SAMPLING
VARIATIONS
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Summary:The personnel, publications and important research results of the three year grant on the control of soot formation are presented in this final report. Systematic probing of the ethene diffusion flame at various N2/fuel dilution ratios using thermophoretic sampling has revealed the variation of height within the flame at which soot precursor particles are converted to carbonaceous aggregates. The measurement of temperature on the axis of the flame at various dilution ratios has been accomplished. The use of the laser microprobe mass spectrometer at the NIST to analyze the samples of soot precursor material and carbonaceous soot has provided the chemical evolution of soot in flames. These results provide the rate of the carbonization of soot precursors. The species found correspond to the stabilomers predicted by earlier thermodynamic calculations. jg p.5