Soot formation in shock-wave-induced pyrolysis of acetylene and benzene with H2, O2, and CH4 addition

Drakon, A. V.; Еремин, А. В.; Mikheyeva, E. Yu.; Shu, Bo; Fikri, Mustapha; Schulz, Christof

doi:10.1016/j.combustflame.2018.09.014

Cited by 26 publications

(6 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transmitted radiation was detected by a 50 mm diameter integrating sphere (Thorlabs, model IS236A-4) equipped with a 630 ± 10 nm interference filter attached to a silicon photodiode (Thorlabs SM05PD1B). Measured absorbances were converted to normalized optical densities D 633 nm as described by Drakon et al The normalized optical soot density is given as D 633 nm = ln true( I 0 I true) false[ normalC false] l in units of m 2 /mol. I 0 and I are the incident and transmitted radiation, l is the absorption path length in m, and [C] is the total carbon concentration in hydrocarbons in the respective mixture in mol/m 3 .…”

Section: Experimental Methodsmentioning

confidence: 99%

Impact of Methanol and Butanol on Soot Formation in Gasoline Surrogate Pyrolysis: A Shock-Tube Study

et al. 2023

Self Cite

View full text Add to dashboard Cite

The influence of methanol and butanol on soot formation during the pyrolysis of a toluene primary reference fuel mixture with a research octane number (RON) of 91 (TPRF91) was investigated by conducting shock-tube experiments. The TPRF91 mixture contained 17 mol % n-heptane, 29 mol % iso-octane, and 54 mol % toluene. To assess the contribution of individual fuel compounds on soot formation during TPRF91 pyrolysis, the pyrolysis of argon diluted (1) toluene, (2) iso-octane, and (3) n-heptane mixtures were also studied. To enable the interpretation of the TPRF91 + methanol and TPRF91 + butanol experiments, the influence of both alcohols on soot formation during the thermal decomposition of toluene and iso-octane was also investigated in a separate series of measurements. Pyrolysis was monitored behind reflected shock waves at pressures between 2.1 and 4.2 bar and in the temperature range of 2060−2815 K. Laser extinction at 633 nm was used to determine the soot yield as a function of reaction time. For selected experiments, the temporal variation in temperature was also measured via time-resolved two-color CO absorption using two quantum-cascade lasers at 4.73 and 4.56 μm. It was found that soot formed during TPRF91 pyrolysis is primarily caused by the thermal decomposition of toluene. Adding methanol to TPRF91 results in a slight reduction of soot formation, whereas admixing butanol results in shifting soot formation to higher temperatures, but in that case, no overall soot reduction was observed during TPRF91 pyrolysis. Measured soot yields were compared to simulations based on a previous and an updated version of a detailed reaction mechanism from the CRECK modeling group [

show abstract

Section: Experimental Methodsmentioning

confidence: 99%

Impact of Methanol and Butanol on Soot Formation in Gasoline Surrogate Pyrolysis: A Shock-Tube Study

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Additionally, the emissions at ϕ = 0.7 and 1.2 are almost 6 orders of magnitude higher than those at ϕ = 0.25 for NO, NO2, an CO. Further gas-phase kinetics modeling was performed to compare the formation of soo of targeted fuels at different ϕ for the engine-related conditions. In this respect, the kineti modeling of the formation of acetylene (C2H2) and diacetylene (C4H2) was taken into ac count as the soot precursors [56,57]. Figure 15 compares the maximum mole fraction o soot precursors, including C2H2 and C4H2 at different equivalence ratios and the engine related conditions for all fuels calculated by the chemical kinetic model during the ignitio process, illustrating the highest emissions at the fuel-rich condition and the lowest emis sion at ultra-lean condition.…”

Section: Emission Prediction Of the Modelmentioning

confidence: 99%

Kinetic Modeling Study on the Combustion Characterization of Synthetic C3 and C4 Alcohols for Lean Premixed Prevaporized Combustion

et al. 2021

Self Cite

View full text Add to dashboard Cite

To reach sustainable aviation, one approach is to use electro-fuels (e-fuels) within the gas turbine engines. E-fuels are CO2-neutral synthetic fuels which are produced employing electrical energy generated from renewable resources, where the carbon is taken out of the atmosphere or from biomass. Our approach is, to find e-fuels, which can be utilized in the lean premixed prevaporized (LPP) combustion, where most of the non-CO2 emissions are prevented. One of the suitable e-fuel classes is alcohols with a low number of carbons. In this work, the autoignition properties of propanol isomers and butanol isomers as e-fuels were investigated in a high-pressure shock tube (HPST) at temperatures from 1200 to 1500 K, the pressure of 10 bar, and lean fuel-air conditions. Additional investigations on the low-temperature oxidation and flame speed of C3 and C4 alcohols from the literature were employed to develop a comprehensive mechanism for the prediction of ignition delay time (IDT) and laminar burning velocity (LBV) of the above-mentioned fuels. A numerical model based on newly developed chemical kinetics was applied to further study the IDT and LBV of fuels in comparison to the Jet-A surrogate at the engine-related conditions along with the emissions prediction of the model at lean fuel-air conditions.

show abstract

“…More specifically, in this work, we use a 633 nm laser source to avoid interfering absorption from the primary combustion products. The wavelength 633 nm has been previously used for soot formation studies in shock tube and flames. − …”

Section: Spectroscopic Fundamentalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…When the optical path length, laser wavelength, and soot refractive index are known, SVF is only related to laser intensity attenuation. This simpler method has been successfully implemented for SVF measurements in laminar flames, 21 shock tubes, 22,23 and practical combustion systems, 24−26 as well as for LII calibration. 26 In addition to experimental studies, many numerical studies have also been performed to study soot formation using kinetic modeling and computational fluid dynamics (CFD).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of Temperature and Soot Volume Fraction in Laminar Premixed Flames: Laser Absorption/Extinction Measurement and Two-Dimensional Computational Fluid Dynamics Modeling

Ma¹,

Ning

Wu³

et al. 2018

Energy Fuels

View full text Add to dashboard Cite

We performed a comprehensive laser absorption/extinction study of temperature and soot volume fraction (SVF) in C2H4/air premixed sooting flames. Laser-absorption two-line thermometry at 2.5 μm provided a temperature uncertainty of 50 K compared with that of 90 K using conventional thermocouples. Laser extinction of soot at 633 nm was first validated against the previous measurements using laser-induced incandescence. All of the measurements were conducted at four representative C2H4 flame conditions (equivalence ratio Φ = 1.78, 1.95, 2.14, and 2.38). In addition, a CFD (computational fluid dynamics) framework coupling a skeletal mechanism (56 species and 428 reactions) with the Moss–Brookes model was developed for interpreting the experimental data. The current CFD simulations well predicted the temperature and SVF distribution along the centerline of flame. It is of interest to observe that the SVF depends on the Reynolds number of reactants by investigating the SVFs at different heights above the burner for the varied flow rates and equivalence ratios.

show abstract

Soot formation in shock-wave-induced pyrolysis of acetylene and benzene with H2, O2, and CH4 addition

Cited by 26 publications

References 63 publications

Impact of Methanol and Butanol on Soot Formation in Gasoline Surrogate Pyrolysis: A Shock-Tube Study

Impact of Methanol and Butanol on Soot Formation in Gasoline Surrogate Pyrolysis: A Shock-Tube Study

Kinetic Modeling Study on the Combustion Characterization of Synthetic C3 and C4 Alcohols for Lean Premixed Prevaporized Combustion

Characterization of Temperature and Soot Volume Fraction in Laminar Premixed Flames: Laser Absorption/Extinction Measurement and Two-Dimensional Computational Fluid Dynamics Modeling

Contact Info

Product

Resources

About