Results 201 to 210 of about 12,370 (256)
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Ice nucleation on soot particles
Journal of Aerosol Science, 1998Abstract The ice-forming activity of soot particles of various sizes has been studied in a cloud chamber under temperatures ranging from −5 to −20°C. It was found that the fraction of aerosol particles forming ice crystals was influenced by the temperature, the mean radius of aerosol particles and the degree of oxidising of the soot particle surface.
B. Gorbunov +4 more
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Effect of Oxidation Catalysts on Diesel Soot Particles
Environmental Science & Technology, 2006The effect of a conventional oxidation catalyst and a novel particle oxidation catalyst (POC) on diesel particles is studied using identical methodology. Regulated particulate matter emission measurement is followed by analyzing soluble organic fraction.
Vaaraslahti, Kati +6 more
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On the mechanism of soot particle formation
Kinetics and Catalysis, 2000The results of experiments on the isothermic pyrolysis of acetylene, benzene, and diacetylene in a flow reactor near a low-temperature threshold of soot formation are presented. Diacetylene showed a much higher ability to form soot, coke, and tar than the other hydrocarbons. The threshold temperature of soot formation from diacetylene (800 K) was found
A. V. Krestinin +4 more
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1983
Soot in flames is often a necessary component as it makes possible an efficient heat transfer by radiation. Naturally, it must be subsequently destroyed to avoid pollution. The present paper is focussed on soot oxidation by gaseous reagents.
Jean-Baptiste Donnet, Jacques Lahaye
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Soot in flames is often a necessary component as it makes possible an efficient heat transfer by radiation. Naturally, it must be subsequently destroyed to avoid pollution. The present paper is focussed on soot oxidation by gaseous reagents.
Jean-Baptiste Donnet, Jacques Lahaye
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Faraday Symposia of the Chemical Society, 1973
Probable mechanisms are discussed of the formation processes of pyrolytic carbon films and soot particles, based on experimental investigations of their formation rates. Both are two-stage processes including nucleation and growth of nuclei. The formation of pyrolytic carbon from methane at temperatures below 1300 K is a molecular process.
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Probable mechanisms are discussed of the formation processes of pyrolytic carbon films and soot particles, based on experimental investigations of their formation rates. Both are two-stage processes including nucleation and growth of nuclei. The formation of pyrolytic carbon from methane at temperatures below 1300 K is a molecular process.
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A picture of soot particle inception
Symposium (International) on Combustion, 1989We have shown in earlier work that the ultimate soot loading in a sooting premixed flame is determined largely by processes that occur before the growth region, even though 90% of the soot mass is contributed by C2H2 surface growth. In this work we make the first measurements of how early soot formation kinetics vary with equivalence ratio.
Stephen J. Harris, Anita M. Weiner
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Laser microprobe analysis of soot precursor particles and carbonaceous soot
Combustion and Flame, 1995Samples of soot precursor particles and carbonaceous soot from a nonsmoking ethene diffusion flame have been analyzed by means of laser microprobe mass spectrometry (LMMS). The mass spectra of soot precursor particles from the lower flame display many peaks in the 200–300-amu range that are characteristic of polycyclic aromatic hydrocarbons (PAHs). The
R.A. Dobbins, R.A. Fletcher, W. Lu
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Soot Precursor Particles in Flames
1994Thermophoretic sampling was conducted in buoyancy dominated diffusion flames fueled by ethene, methane and acetylene and in the laminar ethene flame. Small polydisperse singlet particles which are more transparent to the electron beam are found at intermediate temperatures on the fuel side of the flame front in these flames.
Richard A. Dobbins +1 more
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Soot particle size and soot yield in shock tube studies
Combustion and Flame, 1983Abstract The size of soot particles formed during the shock tube pyrolysis of toluene was measured by laser Doppler velocimetry. The particle size appeared to be of the order of a micron, i.e. about an order of magnitude higher than previously reported in the literature.
M. Frenklach +3 more
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Measurement of Naphthalene Uptake by Combustion Soot Particles
Environmental Science & Technology, 2013In this study, we designed and constructed an experimental laboratory apparatus to measure the uptake of volatile organic compounds (VOCs) by soot particles. Results for the uptake of naphthalene (C10H8) by soot particles typical of those found in the exhaust of an aircraft engine are reported in this paper.
David S, Liscinsky +8 more
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