The effect of methyl pentanoate addition on the structure of premixed fuel-rich n-heptane/toluene flame at atmospheric pressure

Impacts of oxygenated compounds concentration on sooting propensities and soot oxidative reactivity: Application to Diesel and Biodiesel surrogates

“…The As expected, the highest YSI value is obtained for the Aref surrogate, while the lowest value is obtained after adding 30 % of the oxygenated compound methyldecanoate MD30. This is in agreement with the literature review [16][17][18][19][20]41]. This highest soot reduction observed when MD is used as an additive in the Diesel reference fuel surrogate Aref can mainly be linked to the dilution effect, which replaces highly sooting components (α-MN) (which are well known for the promotion of soot formation) by less sootier components like paraffinic chains, whatever the oxygen concentration in the MD [16,17].…”

“…The previous results concerning the impact of oxygenated additives on sooting tendencies of surrogate fuels proved that these sooting tendencies monotonically decrease with increasing oxygenate concentration in the fuel mixture. Three main factors have been identified which explain this relationship: the dilution effect of the base fuel when adding oxygenated additives [16,17], the reduction of the mole fractions of key intermediate products which play an important role in the formation of soot precursors [18] and the formation of oxidant radicals which enhance more soot oxidation than soot formation [19]. Furthermore, McEnally and Pefferle [20] measured the sooting tendencies of 186 oxygenated hydrocarbons in terms of the Yield Sooting Index (YSI).…”

Experiments and modeling of the autoignition of methyl pentanoate at low to intermediate temperatures and elevated pressures in a rapid compression machine

“…To the best of our knowledge, there are three mechanisms for MV combustion available in the literature. The first two, by Korobeinichev et al [5] and Dmitriev et al [6], were developed to simulate flames, and do not include the low-temperature chemistry necessary to simulate the conditions in these experiments. The third model was developed by Diévart et al [8] and includes low-temperature chemistry of MV, although it was only validated by comparison with flame extinction limits.…”

“…Korobeinichev et al [5] studied MV in premixed laminar flames and extended a detailed high temperature chemical kinetic model to include MV and methyl hexanoate. Dmitriev et al [6] added MV to n-heptane/toluene fuel blends to determine the resulting intermediate species in premixed flames using a flat burner at 1 atm and an equivalence ratio of 1.75. The addition of MV helped reduce soot forming intermediates including benzene, cyclopentadienyl, acetylene, propargyl, and vinylacetylene [6].…”

“…Dmitriev et al [6] added MV to n-heptane/toluene fuel blends to determine the resulting intermediate species in premixed flames using a flat burner at 1 atm and an equivalence ratio of 1.75. The addition of MV helped reduce soot forming intermediates including benzene, cyclopentadienyl, acetylene, propargyl, and vinylacetylene [6]. Hayes and Burgess [7] computationally examined the peroxy radical isomerization reactions for MV to better understand the low temperature reaction pathways.…”