Effect of mixing methane, ethane, propane and ethylene on the soot particle size distribution in a premixed propene flame

Lin, Baiyang; Gu, Hao; Nie, Hong; Guan, Bin; Li, Zhongzhao; Han, Dong; Gu, Chen; Shao, Can; Huang, Zhen; Lin, He

doi:10.1016/j.combustflame.2018.03.002

Cited by 21 publications

(7 citation statements)

References 24 publications

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“…This difference is consistent with the findings of the nanoparticle volume fraction in Figures 4A,B at a height of HAB 15 mm, in which the leaner flame configuration shows a monotonic decrease of nanoparticle volume fraction with increasing OME 3 blending, whereas the richer configuration exhibits a non-monotonic behaviour with an intermediate increase in nanoparticle volume fraction. Similar non-monotonic behavior was found previously for premixed propene flames blended with ethylene (Lin et al, 2018), in which small amounts of ethylene addition led to an intermediate increase in soot formation while larger amounts decreased the amount of soot. It was found that this effect is due to a synergistic effect of the two fuels by the acetylene addition and propargyl recombination/addition pathways (Lin et al, 2018).…”

Section: Soot Formationsupporting

confidence: 86%

“…Similar non-monotonic behavior was found previously for premixed propene flames blended with ethylene (Lin et al, 2018), in which small amounts of ethylene addition led to an intermediate increase in soot formation while larger amounts decreased the amount of soot. It was found that this effect is due to a synergistic effect of the two fuels by the acetylene addition and propargyl recombination/addition pathways (Lin et al, 2018).…”

Section: Soot Formationsupporting

confidence: 86%

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Numerical Investigation on the Effect of the Oxymethylene Ether-3 (OME3) Blending Ratio in Premixed Sooting Ethylene Flames

et al. 2021

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Synthetic fuels, especially oxygenated fuels, which can be used as blending components, make it possible to modify the emission properties of conventional fossil fuels. Among oxygenated fuels, one promising candidate is oxymethylene ether-3 (OME3). In this work, the sooting propensity of ethylene (C2H4) blended with OME3 is numerically investigated on a series of laminar burner-stabilized premixed flames with increasing amounts of OME3, from pure ethylene to pure OME3. The numerical analysis is performed using the Conditional Quadrature Method of Moments combined with a detailed physico-chemical soot model. Two different equivalence ratios corresponding to a lightly and a highly sooting flame condition have been investigated. The study examines how different blending ratios of the two fuels affect soot particle formation and a correlation between OME3 blending ratio and corresponding soot reduction is established. The soot precursor species in the gas-phase are analyzed along with the soot volume fraction of small nanoparticles and large aggregates. Furthermore, the influence of the OME3 blending on the particle size distribution is studied applying the entropy maximization concept. The effect of increasing amounts of OME3 is found to be different for soot nanoparticles and larger aggregates. While OME3 blending significantly reduces the amount of larger aggregates, only large amounts of OME3, close to pure OME3, lead to a considerable suppression of nanoparticles formed throughout the flame. A linear correlation is identified between the OME3 content in the fuel and the reduction in the soot volume fraction of larger aggregates, while smaller blending ratios may lead to an increased number of nanoparticles for some positions in the flame for the richer flame condition.

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Section: Soot Formationsupporting

confidence: 86%

Section: Soot Formationsupporting

confidence: 86%

Numerical Investigation on the Effect of the Oxymethylene Ether-3 (OME3) Blending Ratio in Premixed Sooting Ethylene Flames

et al. 2021

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“…Differential mobility analyzer (DMA) is becoming an increasingly popular tool for the determination of size distributions of flame-generated soot particles [18,49,52,54,125,355,[513][514][515]. DMA, as a size-selecting device, is usually adopted in combination with a particle counter, constituting a scanning mobility particle sizer (SMPS) system.…”

Section: Differential Mobility Analysismentioning

confidence: 99%

Soot formation in laminar counterflow flames

Wang

Chung

2019

Progress in Energy and Combustion Science

360

116

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Many practical soot-emitting combustion systems such as diesel and jet engines rely on diffusion flames for efficient and reliable operation. Efforts to mitigate soot emissions from these systems are dependent on fundamental understanding of the physicochemical pathways leading from fuel to soot in laminar diffusion flames. Existing diffusion flame−based soot studies focused primarily on overventilated coflow flame where the fuel gas (or vapor) issues from a cylindrical tube into a co-flowing oxidizer, and counterflow flame, where a reacting zone is established between two opposing streams of fuel and oxidizer. As a canonical diffusion flame configuration, laminar counterflow diffusion flames have been widely used as a highly controllable environment for soot research, enabling significant progress in the understanding of soot formation for several decades. In view of the possibility of fuel/oxidizer premixing in practical systems, counterflow partially premixed flames have also been studied. In the present work we intend to provide a comprehensive review of the researches on various aspects of soot formation utilizing counterflow flames. Major processes of soot formation (formation of gas phase soot precursors, soot inception and surface reactions, as well as particle-particle interactions) are examined first, with focus on the most recent (post-2010) research progress. Experimental techniques and associated challenges for the measurement of soot-related properties (some knowledge of which is helpful for full appreciation of the experimental data to be reviewed) are then introduced. This is followed by a detailed description of soot evolution in counterflow flames, which is complemented by a discussion on the similarity and differences of the sooting structures between counterflow and coflow diffusion flames. Parametric studies of the effects of fuel molecular structure, fuel additive, partial-premixing, pressure, temperature, stoichiometric mixture fraction, and residence time on soot formation in counterflow flames will then be addressed in detail. This review concludes with a summary of the knowledge and challenges gathered and demonstrated through decades of research, and an outlook on opportunities for future counterflow flame−based soot research towards a more complete understanding of soot formation and the development of novel techniques for soot mitigation in practical combustion devices.

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“…The diameters of the thermocouple and coated bead were 0.13 mm and 0.38 mm, respectively. The measurement method has been introduced in detail in our previous papers [14,15,41,42]. The upper boundary temperature was approximately represented by the temperature of the stagnation plate undersurface that was measured by a inserted K-type thermocouple.…”

Section: Burner and Flamesmentioning

confidence: 99%

LIF diagnostics for selective and quantitative measurement of PAHs in laminar premixed flames

Zhang

Xiao

et al. 2020

Combustion and Flame

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Effect of mixing methane, ethane, propane and ethylene on the soot particle size distribution in a premixed propene flame

Cited by 21 publications

References 24 publications

Numerical Investigation on the Effect of the Oxymethylene Ether-3 (OME3) Blending Ratio in Premixed Sooting Ethylene Flames

Numerical Investigation on the Effect of the Oxymethylene Ether-3 (OME3) Blending Ratio in Premixed Sooting Ethylene Flames

Soot formation in laminar counterflow flames

LIF diagnostics for selective and quantitative measurement of PAHs in laminar premixed flames

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