Soot particle sizing by LII during shock tubepyrolysis of C6H6

Starke, R.; Roth, P.

doi:10.1016/s0010-2180(01)00329-7

Cited by 38 publications

(35 citation statements)

References 21 publications

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“…In this case, variation of the hydrocarbon concentration has almost no influence on the concentration of the particles formed. This phenomenon has been observed earlier in experiments with the decomposition of toluene in complete combustion gases [16], and later in experiments with the decomposition of benzene in a cocurrent nitrogen flow [17] and in shock tube studies [1]. This is due to a competition of the processes of radical formation and growth of carbon nanoparticle nuclei, which differ sharply in activation energy.…”

Section: Discussion Of Resultssupporting

confidence: 53%

“…The high rate of hydrocarbon conversion with the formation of dispersed carbon particles during pyrolysis and incomplete combustion was noted in many papers [1][2][3][4][5][6]. Measuring reaction times is a major difficulty in experiments of this kind because of the high rates of the reactions studied.…”

Section: Introductionmentioning

confidence: 99%

“…1 Institute of Problems of Hydrocarbon Processing, Siberian Division, Russian Academy of Sciences, Omsk 644040; uglerod@ihcp2.oscsbras.ru.…”

Section: Introductionmentioning

confidence: 99%

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Formation and growth of dispersed carbon particles during pyrolysis of ethylene, benzene, and naphthalene in a reflected shock wave

Surovikin

Shaitanov

2007

Combust Explos Shock Waves

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The formation and growth rates of dispersed carbon particles were determined experimentally for pyrolysis of ethylene, benzene, and naphthalene in a reflected shock wave at temperatures of 1920-2560 K and hydrocarbon concentrations in argon of 1.8-20%. The diameter of the particles formed was estimated (30-600Å). The maximum rate of particle formation at various temperatures [(0.7-96) · 10 16 cm −3 · sec −1 ] and the particle growth rate (0.002-0.036 cm · sec −1 ) were determined from results of measurements of reaction (residence) times. For pyrolysis of benzene, the activation energy of the overall process of particle formation is 410 kJ/mole, and for all hydrocarbons studied, the activation energy of the overall process of particle growth is 5-50 kJ/mole. The surface average particle diameter increases with increasing concentration of the initial hydrocarbon at a constant temperature.

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Section: Discussion Of Resultssupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

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Formation and growth of dispersed carbon particles during pyrolysis of ethylene, benzene, and naphthalene in a reflected shock wave

Surovikin

Shaitanov

2007

Combust Explos Shock Waves

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“…Reasonable initial venues include flame burners enclosed in high-pressure combustion chambers, where soot volume and temperature are measured by use of the spectral soot emission diagnostic and line-of-sight attenuation technique [150,151]. Additionally, soot formation has been analyzed with laser-induced incandescence and continuous-wave laser extinction techniques from experiments of benzene oxidation conducted in shock tubes [152] and from actual diesel injector sprays at representative engine temperatures and pressures [153].…”

Section: Chemical Kinetic Development Targetsmentioning

confidence: 99%

Development of an Experimental Database and Kinetic Models for Surrogate Diesel Fuels

Farrell¹,

Cernansky²,

Dryer³

et al. 2007

SAE Technical Paper Series

328

241

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“…The experiments at λ = 800 nm were performed at T 5 = 2120, 2450 and 2630 K to determine the effect of the wavelength on the duration of the initial stage in the case where they are determined using the same method. The same figure gives the results of experiments [10] at λ = 632.8 nm, in which induction periods were measured for 2% mixtures of benzene. Note.…”

Section: Resultsmentioning

confidence: 79%

Induction period for the formation of nanodispersed carbon particles during hydrocarbon pyrolysis behind a reflected shock front

Shaitanov

Surovikin

2009

Combust Explos Shock Waves

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Experiments were performed to estimate the time of isothermal transformation of model hydrocarbons (ethylene, benzene, and naphthalene) to solid carbon nanoparticles. An optical procedure combined with a shock tube was used to experimentally study the duration of the initial reaction stages before the occurrence of emission with a continuous visible spectrum. This emission is caused by the new (condensed and not gaseous) phase of carbon atoms formed in hydrocarbon pyrolysis behind a reflected shock front. The measurements are based on recording the time of occurrence of emission at a wavelength λ = 750 nm. The durations of the induction periods are in the range 12-160 μsec and decrease with increasing temperature in the range 1920-2560 K for each hydrocarbon, and also with increasing number of carbon atoms in the hydrocarbon molecule. The apparent activation energies for the formation of nanodispersed carbon particles were estimated from the measured durations of the initial reaction stages: 204 kJ/mole for ethylene, 65 kJ/mole for benzene, and 44 kJ/mole for naphthalene.Key words: reflected shock wave, pyrolysis of individual hydrocarbons, induction period, formation of precursors of dispersed carbon particles.

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Soot particle sizing by LII during shock tubepyrolysis of C6H6

Cited by 38 publications

References 21 publications

Formation and growth of dispersed carbon particles during pyrolysis of ethylene, benzene, and naphthalene in a reflected shock wave

Formation and growth of dispersed carbon particles during pyrolysis of ethylene, benzene, and naphthalene in a reflected shock wave

Development of an Experimental Database and Kinetic Models for Surrogate Diesel Fuels

Induction period for the formation of nanodispersed carbon particles during hydrocarbon pyrolysis behind a reflected shock front

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