The autoignition of C8H10 aromatics at moderate temperatures and elevated pressures

Shen, Hsi-Ping S.; Oehlschlaeger, Matthew A.

doi:10.1016/j.combustflame.2008.11.015

Cited by 115 publications

(93 citation statements)

References 25 publications

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“…Moreover, the findings indicate a universal reactivity behavior between dimethyl and ethyl isomers of cyclic compounds, based on the results of another study by Eldeeb and Akih-Kumgeh [197] that compared the ignition delay times of 2,5-DMF and 2-EF, along with another reactivity trend comparison between 1,3-dimethylcyclohexane and ethylcyclohexane, which revealed a similar trend. The same behavior was previously observed for 1,3-dimethylbenzene (m-xylene) and ethylbenzene by Shen and Oehlschlaeger [201]. Further comparative ignition trends of 2,5-DMF, 2-MF and furan were also studied by Xu et al [198].…”

Section: Comparative Ignition Studies Of Furanssupporting

confidence: 60%

Recent Trends in the Production, Combustion and Modeling of Furan-Based Fuels

Eldeeb

Akih-Kumgeh

2018

Energies

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Abstract:There is growing interest in the use of furans, a class of alternative fuels derived from biomass, as transportation fuels. This paper reviews recent progress in the characterization of its combustion properties. It reviews their production processes, theoretical kinetic explorations and fundamental combustion properties. The theoretical efforts are focused on the mechanistic pathways for furan decomposition and oxidation, as well as the development of detailed chemical kinetic models. The experiments reviewed are mostly concerned with the temporal evolutions of homogeneous reactors and the propagation of laminar flames. The main thrust in homogeneous reactors is to determine global chemical time scales such as ignition delay times. Some studies have adopted a comparative approach to bring out reactivity differences. Chemical kinetic models with varying degrees of predictive success have been established. Experiments have revealed the relative behavior of their combustion. The growing body of literature in this area of combustion chemistry of alternative fuels shows a great potential for these fuels in terms of sustainable production and engine performance. However, these studies raise further questions regarding the chemical interactions of furans with other hydrocarbons. There are also open questions about the toxicity of the byproducts of combustion.

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Section: Comparative Ignition Studies Of Furanssupporting

confidence: 60%

Recent Trends in the Production, Combustion and Modeling of Furan-Based Fuels

Eldeeb

Akih-Kumgeh

2018

Energies

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“…In the present study the shock tube was not heated and ignition delay time measurements were made in stationary reflected shock-heated gases using the side wall pressure, measured 2 cm from the driven section endwall, and electronically-excited hydroxyl radical chemiluminescence (OH  ) measured at the endwall [14]. An example ignition delay time measurement is shown in Fig.…”

Section: Rensselaer Polytechnic Institute Shock Tubementioning

confidence: 99%

“…Ignition delay time measurements were carried out in the high-pressure shock tube at Rensselaer (5.7 cm inner diameter) previously described by Shen and Oehlschlaeger [14]. In the present study the shock tube was not heated and ignition delay time measurements were made in stationary reflected shock-heated gases using the side wall pressure, measured 2 cm from the driven section endwall, and electronically-excited hydroxyl radical chemiluminescence (OH  ) measured at the endwall [14].…”

Section: Rensselaer Polytechnic Institute Shock Tubementioning

confidence: 99%

An experimental and modeling study of propene oxidation. Part 2: Ignition delay time and flame speed measurements

Burke

Donagh

et al. 2015

Combustion and Flame

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288

208

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Experimental data obtained in this study (Part II) complement the speciation data presented in Part I, but also offer a basis for extensive facility cross-comparisons for both experimental ignition delay time (IDT) and laminar flame speed (LFS) observables.To improve understanding of the ignition characteristics of propene, a series IDT experiments were performed in six different shock tubes and two rapid compression machines (RCMs) under conditions not previously studied. This study is the first of its kind to directly compare ignition in several different shock tubes over a wide range of conditions. For common nominal reaction conditions among these facilities, cross-comparison of shock tube IDTs suggests 20-30% reproducibility (2σ) for the IDT observable. The combination of shock tube and RCM data greatly expands the data available for validation of propene oxidation models to higher pressures (2-40 atm) and lower temperatures (750-1750 K).Propene flames were studied at pressures from 1-20 atm and unburned gas temperatures of 295-398 K for a range of equivalence ratios and dilutions in different facilities. The present propene-air LFS results at 1 atm were also compared to LFS measurements from the literature. With respect to initial reaction conditions, the present experimental LFS cross-comparison is not as comprehensive as the IDT comparison; however, it still suggests reproducibility limits for the LFS observable. For the LFS results, there was agreement between certain data sets and for certain equivalence ratios (mostly in the lean region), but the remaining discrepancies highlight the need to reduce uncertainties in laminar flame speed experiments amongst different groups and different methods. Moreover, this is the first study to investigate the burning rate characteristics of propene at elevated pressures (> 5 atm).IDT and LFS measurements are compared to predictions of the chemical kinetic mechanism presented in Part I and good agreement is observed.

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“…Shen et al [75] studied the autoignition of the C8 aromatics (ortho-xylene, meta-xylene, paraxylene and ethylbenzene) in a shock tube over a wide range of conditions relevant to diesel engines (941-1408 K, 9-45 atm, and equivalence ratios of 5.0 and 1.0). Ethyl benzene was found to be the most reactive followed by the less reactive xylenes, ortho, meta and para.…”

Section: Monoaromaticsmentioning

confidence: 99%

Recent progress in the development of diesel surrogate fuels

Pitz

Mueller

2011

Progress in Energy and Combustion Science

645

371

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There has been much recent progress in the area of surrogate fuels for diesel. In the last few years, experiments and modeling have been performed on higher molecular weight components of relevance to diesel fuel such as n-hexadecane (n-cetane) and 2,2,4,4,6,8,8-heptamethylnonane (iso-cetane). Chemical kinetic models have been developed for all the n-alkanes up to 16 carbon atoms. Also, there has been much experimental and modeling work on lower molecular weight surrogate components such as n-decane and n-dodecane that are most relevant to jet fuel surrogates, but are also relevant to diesel surrogates where simulation of the full boiling point range is desired. For two-ring compounds, experimental work on decalin and tetralin recently has been published. For multi-component surrogate fuel mixtures, recent work on modeling of these mixtures and comparisons to real diesel fuel is reviewed. Detailed chemical kinetic models for surrogate fuels are very large in size. Significant progress also has been made in improving the mechanism reduction tools that are needed to make these large models practicable in multidimensional reacting flow simulations of diesel combustion. Nevertheless, major research gaps remain. In the case of iso-alkanes, there are experiments and modeling work on only one of relevance to diesel: iso-cetane. Also, the iso-alkanes in diesel are lightly branched and no detailed chemical kinetic models or experimental investigations are available for such compounds. More components are needed to fill out the iso-alkane boiling point range. For the aromatic class of compounds, there has been no new work for compounds in the boiling point range of diesel. Most of the new work has been on alkyl aromatics that are of the range C7 to C8, below the C10 to C20 range that is needed. For the chemical class of cycloalkanes, experiments and modeling on higher molecular weight components are warranted. Finally for multi-component surrogates needed to treat real diesel, the inclusion of higher molecular weight components is needed in models and experimental investigations.

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The autoignition of C8H10 aromatics at moderate temperatures and elevated pressures

Cited by 115 publications

References 25 publications

Recent Trends in the Production, Combustion and Modeling of Furan-Based Fuels

Recent Trends in the Production, Combustion and Modeling of Furan-Based Fuels

An experimental and modeling study of propene oxidation. Part 2: Ignition delay time and flame speed measurements

Recent progress in the development of diesel surrogate fuels

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