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• W4312082480 endingPage "46914" @default.
• W4312082480 startingPage "46900" @default.
• W4312082480 abstract "1,2-Propylene oxide (PO, C3H6O) is considered as a promising agent for improving fuel. In this work, the effect of PO additives on the species pool in a premixed burner-stabilized fuel-rich (ϕ = 1.6) flame fueled by n-heptane/toluene mixture (7/3 by volume of liquids) at atmospheric pressure is studied by the flame-sampling molecular beam mass spectrometry and numerical modeling in order to get insight into the chemical aspects of the influence of oxygenates with an epoxy group on the formation of abundant intermediates (including PAH precursors) during combustion of fossil fuels. The flames with various loadings of PO in the fuel blend (from 0 to 16.3% in mole basis) are examined, and detailed kinetic mechanisms available in the literature are validated against the measurements of mole fraction profiles of reactants, major products, and many intermediate species. A higher reactivity of the fresh mixture and a reduction in the peak mole fractions of intermediates playing an important role in PAH formation (benzene, styrene, ethylbenzene, phenol, acetylene, diacetylene, etc.) are observed when PO is added. This was found to be due to simultaneously two factors: the partial replacement of sooting fuel (toluene, which is the main precursor of these species) with oxygenated additive, and the changes in the flame radical pool caused by PO addition. Propylene oxide additive was found to change the ratio between H, OH, O, and CH3 toward an increase in the proportion of O and CH3. The detailed kinetic mechanisms considered in the work are found to overpredict the peak mole fraction of acetylene, a key species playing a crucial role in PAH growth. Its chemistry is revisited in order to provide a better prediction of C2H2 and, as a result, PAHs." @default.
• W4312082480 created "2023-01-04" @default.
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• W4312082480 date "2022-12-09" @default.
• W4312082480 modified "2023-10-17" @default.
• W4312082480 title "Propylene Oxide Addition Effect on the Chemical Speciation of a Fuel-Rich Premixed <i>n</i>-Heptane/Toluene Flame" @default.
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• W4312082480 doi "https://doi.org/10.1021/acsomega.2c05999" @default.
• W4312082480 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36570235" @default.
• W4312082480 hasPublicationYear "2022" @default.
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