Different chemical effect of hydrogen addition on soot formation in laminar coflow methane and ethylene diffusion flames

Wang, Yang; Gu, Mingyan; Chao, Ling; Wu, Jiajia; Lin, Yu-Yu; Huang, Xiangyong

doi:10.1016/j.ijhydene.2021.02.014

Cited by 35 publications

(4 citation statements)

References 36 publications

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“…On the other hand, in the hydrogen addition test shown in Fig. 14, the observed soot region becomes longer as the flame length increased, well accordance with previous measurements (Wang et al, 2021). That is, hydrogen enhances the soot formation.…”

Section: Image and Soot Concentration Fieldsupporting

confidence: 91%

“…It is noted that hydrogen has a lower calorific value per unit mole than methane or propane. The addition of hydrogen changes the flame temperature (Wang et al, 2021), corresponding to the thermal effect. At the same time, the chemical reaction paths as well as reaction rates are supposed to be changed by hydrogen, corresponding to the kinetic effect.…”

Section: Experimental Conditionsmentioning

confidence: 99%

“…Then, the LII signal was converted to the soot volume fraction based on the linearity between them. As for the hydrogen-blended hydrocarbon diffusion flames, more research using methane (Ezenwajiaku et al, 2019;Do et al, 2021;He et al, 2021;Wang et al, 2021;Nam et al, 2023;Gee et al, 2024) and propane (Gülder et al, 1996;He et al, 2021;Nam et al, 2023;Wang et al, 2023) has been conducted. In experiments, the two-dimensional distribution of the soot concentration was obtained, and the maximum soot volume fraction and the total soot volume were evaluated from the LII signal.…”

Section: Introductionmentioning

confidence: 99%

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Effects of hydrogen addition on soot emission of methane and propane coaxial jet diffusion flames

YAMAMOTO,

KIMURA

2024

JTST

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In recent years, environmental problems such as global warming and air pollution have been recognized more seriously. Soot in the combustion products is one of the causes of air pollution. Hydrogen is now attracting attention as an alternative fuel to fossil fuels because it can be carbon-neutral fuel synthesized from renewable energy sources. If hydrogen is mixed with hydrocarbon fuels, it is possible to reduce CO 2 emission. In this study, we investigated the effect of hydrogen addition on a coaxial jet diffusion flame. We used methane and propane as main fuels, and soot region was visualized using a laser induced incandescence (LII) method. In experiments, two-dimensional distribution of the soot concentration was obtained, and the maximum soot volume fraction and the total soot volume were evaluated from the LII signal. In order to clarify the effect of hydrogen addition, nitrogen was also added to the main fuel, and both results were compared.

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Section: Image and Soot Concentration Fieldsupporting

confidence: 91%

Section: Experimental Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of hydrogen addition on soot emission of methane and propane coaxial jet diffusion flames

YAMAMOTO,

KIMURA

2024

JTST

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“…To improve the efficiency of the flame and the reduction of pollutants, it is widely used as a doping substance [6]. In previous studies, Wang et al [7] have studied the chemical impact of hydrogen on soot formation and analyse the main training paths of benzene and Pyrene (C16H10) to see how hydrogen affects its composition in the flames of methane and ethylene.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Strain Rate and the Chemical Effects of H2 and CO on the Soot Formation of Ethylene-Syngas in Opposed Jet Laminar Diffusion Flame

Seghaier,

Amar,

Abdelbaki

et al. 2023

IJHT

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In this work, the effects of the composition of the syngas, the deformation rate and the chemical effect of H2 and CO on the internal structure of the flame as well as the soot formation, in a laminar diffusion flame of a syngas mixture / ethylene. The configuration has two opposite jets and is used at an interval of the ignition deformation rate at extinction under atmospheric pressure. Chemistry in the gas phase is coupled according to the soot model based on polycyclic aromatic hydrocarbons (PAH), by the moment's method. The insertion of the inactive species FH2 and FCO will also be included to determine the chemical effect of H2 and CO. The results have shown that the increase in hydrogen in the syngas leads to a decrease in the growth rates of the soot in dilution effect as well as by chemical effects due to the abolition of the abstraction reaction of H in the hydrogenaddition hydrogen abstraction sequence of C2H2.

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Oxygen effects on soot formation in H2/n-heptane counterflow flames

Nobili

Zheng

Pelucchi

et al. 2023

Combustion and Flame

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Different chemical effect of hydrogen addition on soot formation in laminar coflow methane and ethylene diffusion flames

Cited by 35 publications

References 36 publications

Effects of hydrogen addition on soot emission of methane and propane coaxial jet diffusion flames

Effects of hydrogen addition on soot emission of methane and propane coaxial jet diffusion flames

The Effect of Strain Rate and the Chemical Effects of H2 and CO on the Soot Formation of Ethylene-Syngas in Opposed Jet Laminar Diffusion Flame

Oxygen effects on soot formation in H2/n-heptane counterflow flames

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