Soot and NO formation in methane–oxygen enriched diffusion flames

A, Beltrame; Porshnev, P. I.; Merchan-Merchan, Wilson; Saveliev, Alexei V.; Fridman, Alexander; Kennedy, Lawrence A.; Петрова, О. В.; Жданок, С. А.; Amouri, F; Charon, O.

doi:10.1016/s0010-2180(00)00185-1

Cited by 153 publications

(76 citation statements)

References 34 publications

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“…Lee et al [12] also studied the effects of O 2 addition to the coflow in laminar methane diffusion flames and found a larger soot reduction for 100% oxygen. On the contrary, in a methane counterflow configuration, increasing the oxygen content of the oxidizer stream can enhance soot formation [13].…”

Section: The Flue Gas Recirculation (Fgr) and Exhaust Gas Recirculatimentioning

confidence: 99%

Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames

Wang

Legros

Bonnety

et al. 2017

Combustion and Flame

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, et al.. Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames. Combustion and Flame, Elsevier, 2017, 183, pp.242-252. <10.1016/j.combustflame.2017 over a wide range of CO 2 replacement of N 2 in the coflowing oxidizer stream, it can be considered a distinct characteristic for the assessment of numerical simulations incorporating soot formation and oxidation models. As an original database, the concomitantly measured soot temperature and volume fraction distributions are attached to the present paper as supplemental materials, thus documenting the aforementioned transitions for the whole range of CO 2 content of the coflow investigated.

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Section: The Flue Gas Recirculation (Fgr) and Exhaust Gas Recirculatimentioning

confidence: 99%

Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames

Wang

Legros

Bonnety

et al. 2017

Combustion and Flame

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“…The effect of the local flame strain rate on soot formation has been investigated in various studies, but mostly in laminar flames because such flames allow stable and well-defined conditions that are not achievable in turbulent conditions. These studies found out that both soot concentration and soot zone thickness decrease with increasing flame strain rate [4][5][6]. However, in turbulent sooty flames the measurements of strain rate are predominantly limited to characteristic, or global, rather than local values due to the difficulties of performing such measurements in unsteady flames containing soot.…”

Section: Introductionmentioning

confidence: 99%

The effect of exit strain rate on soot volume fraction in turbulent non-premixed jet flames

Mahmoud

Nathan

Alwahabi

et al. 2017

Proceedings of the Combustion Institute

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“…Park et al mentioned in [20], that in oxyfuel combustion, in comparison to air-combustion, the C 2 -pathway is much more dominant and the reactions for the fuel conversion from C 1 -and C 2 -branch are activated. Beltrame et al confirmed in [21] a significantly enhanced fuel pyrolysis in oxy-fuel conditions. …”

Section: Introductionmentioning

confidence: 89%

Analysis of Structure, Extinction and Broadening in Oxygen-Enhanced Non-Premixed Flames

Stelzner

Hunger

Voss

et al. 2015

Zeitschrift Für Physikalische Chemie

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Abstract:In the present numerical study laminar oxygen-enhanced and oxyfuel CH 4 /N 2 -O 2 /N 2 non-premixed flames were systematically investigated in counter-flow configuration. The compositions of the fuel and the oxidizer stream were chosen in a way, which allows a study of the flame structure at different flame temperatures in a range of approximately 1800-3000 K at constant stoichiometric mixture fraction of st = 0.2. The calculations were performed with the GRI 3.0 as a base kinetic mechanism, while selected cases were also investigated with the Appel et al. mechanism and the GDFkin ® 3.0. The flame structure, extinction and flame broadening effects were investigated for various strain rates by analysing the heat release rate and temperature profiles. Four different heat release rate zones were identified, namely the radical chain branching, the main water and carbon dioxide formation, the fuel oxidation and the fuel pyrolysis zone. While those zones overlap in case of air-combustion, a separation accompanied by a flame broadening is found in oxygen-enhanced flames as a result of the higher flame temperatures. The four heat release zones get affected dissimilarly by increased oxygen content and flame temperature, while the flame broadening is dominated by the shift of the radical branching zone towards the oxidizer side. A comparison between air combustion and pure oxygen combustion shows that the flame is broadened by a factor of approximately 10 as long as the flame conditions are not close to the extinction limits. With increasing strain rate flame extinction starts from the oxidizer side. An increased radical pool and temperature level in the chain branching zone extents the extinction limits towards higher strain rates in oxygen-enhanced flames. On the fuel side, the increased oxygen-content with the associated higher temperature level leads to a strong endothermic zone and an intense activation of the C 2 -pathway.

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Soot and NO formation in methane–oxygen enriched diffusion flames

Cited by 153 publications

References 34 publications

Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames

Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames

The effect of exit strain rate on soot volume fraction in turbulent non-premixed jet flames

Analysis of Structure, Extinction and Broadening in Oxygen-Enhanced Non-Premixed Flames

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