An experimental and kinetic modeling study of cyclopentane and dimethyl ether blends

Lokachari, Nitin; Wagnon, Scott W.; Kukkadapu, Goutham; Pitz, William J.; Curran, Henry J.

doi:10.1016/j.combustflame.2020.10.017

Cited by 19 publications

(17 citation statements)

References 84 publications

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“…While for propane/DME mixtures the model could not predict two-stage ignition behavior for all tested cases, 76 this phenomenon was generally experimentally observed for nbutane/DME mixtures under the conditions of high pressure (12−30 atm) in a temperature range between 622 and 929 K and for 20%, 40%, 60%, and 80% DME addition. 75 86 The measured IDTs showed strong non-Arrhenius or even NTC behavior which was more pronounced when adding DME. However, there was only limited low-temperature heat release (LTHR) detectable, which is associated with the first-stage ignition, indicating that the low-temperature oxidation of cyclopentane undergoes pathways less exothermic than for acyclic alkanes.…”

Section: Hydrocarbon Fuel Reactivitymentioning

confidence: 96%

“…The effects on the reactivity of DME addition to hydrocarbons in the low- and intermediate-temperature regime were studied for the binary systems methane/DME, ethane/DME, propane/DME, , n -butane/DME, and cyclopentane/DME with rapid compression machines. It should be noted that the mixtures containing propane and n -butane consist of two components with known low-temperature oxidation chemistry, whereas in the first two mixtures as well as in the cyclopentane/DME mixture, only DME is a low-temperature reactive fuel.…”

Section: Impact Of Biofuel Addition On Hydrocarbon Fuel Reactivitymentioning

confidence: 99%

“…Very recently, Lokachari et al investigated binary mixtures of cyclopentane/DME under elevated pressures (20 and 40 bar) . The measured IDTs showed strong non-Arrhenius or even NTC behavior which was more pronounced when adding DME.…”

Section: Impact Of Biofuel Addition On Hydrocarbon Fuel Reactivitymentioning

confidence: 99%

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Review of the Influence of Oxygenated Additives on the Combustion Chemistry of Hydrocarbons

et al. 2021

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This review summarizes the chemical impact of oxygenated additives on the combustion chemistry of hydrocarbons. Experimental studies in shock tubes, rapid compression machines, jet-stirred reactors, flow reactors, and premixed flames are summarized for additions of ethers, alcohols, esters, and other oxygenates to hydrocarbon fuels. Special emphasis is on the ignition behavior at low and high temperatures and on how molecule-specific intermediate chemistry impacts pollutant emissions by the addition of oxygenated components to hydrocarbon fuels. The literature work indicates that at high temperatures, i.e., in flames, the combustion chemistry of the oxygenate/hydrocarbon can be accurately modeled by merging the individual's submechanisms, excluding cross reactions. The observed trend in the intermediate species pool is largely due to a replacement effect, which describes a linear dependence of the intermediate concentration on the mixture composition. At low-temperatures, the chemistry is slightly more complex because of the fuel-specific reactivity in this temperature range. It was shown that unreactive fuels can undergo low-temperature oxidation processes when a highly reactive fuel component is present. As such, the sensitivities of specific reactions on ignition delay times varies.

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Section: Hydrocarbon Fuel Reactivitymentioning

confidence: 96%

Section: Impact Of Biofuel Addition On Hydrocarbon Fuel Reactivitymentioning

confidence: 99%

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Review of the Influence of Oxygenated Additives on the Combustion Chemistry of Hydrocarbons

et al. 2021

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“…Various injection strategies [3][4][5][6][7][8], engine operation conditions [9][10][11] and fuel blends [12][13][14][15][16][17][18] of DME-fueled engines have been investigated. Youn et al [8] showed that the use of DME was associated with a higher pressure and earlier increase in the Energies 2022, 15,1912 2 of 11 heat release rate (HRR) compared to diesel, because the ignition delay was shorter, the vaporization characteristics were more favorable, and the cetane number was higher. Jeon et al [7,11] studied DME combustion and fuel/air mixture formation process using experimental and numerical methods.…”

Section: Introductionmentioning

confidence: 99%

“…This enabled reductions in nitrogen oxide (NO x ) and soot emissions when the combustion temperature is decreased during the combustion process. As the physical properties of DME are similar to those of liquefied petroleum gas (LPG), DME has been blended successfully with diesel [12], LPG [13], biodiesel [16,17], gasoline [18] and other fuels [14,15].…”

Section: Introductionmentioning

confidence: 99%

Combustion Performance and Low NOx Emissions of a Dimethyl Ether Compression-Ignition Engine at High Injection Pressure and High Exhaust Gas Recirculation Rate

Youn

Jeon

2022

Energies

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Dimethyl ether (DME) is a promising alternative to diesel for compression-ignition (CI) engines used in various industrial applications. However, the high nitrogen oxide (NOx) emissions of DME combustion have restricted its use. The primary cause of high NOx emissions is a high combustion temperature. In this study, a high exhaust gas recirculation (EGR) rate was used when testing a common-rail direct injection CI engine suitable (with minor modifications) for a passenger car. A modified fuel supply system created high injection pressure during evaluation of combustion performance. The physical and chemical properties of DME were the principal determinants of the ignition delay, combustion speed, and heat release rate. Although a high injection pressure accelerated formation of the fuel-air mixture and the combustion speed, combustion performance deteriorated with increased NOx emissions. An increased EGR rate affected combustion and the NOx concentration. A high EGR rate effectively reduced NOx formation and emission under low-temperature combustion conditions. Also, the good DME combustion characteristics were maintained when the EGR rate was high, unlike for an ultra-low sulfur diesel engine.

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Comparative study of the high‐temperature auto‐ignition of cyclopentane and tetrahydrofuran

Do,

Lefort,

Serinyel

et al. 2023

Int J of Chemical Kinetics

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Cyclopentane (C5H10) and tetrahydrofuran (C4H8O) are both five‐membered ring compounds. The present study compares the auto‐ignition of cyclopentane and tetrahydrofuran in a high‐pressure shock‐tube (20 atm). Twelve different mixtures were investigated at two different fuel initial mole fractions (1% and 2%): at Xfuel = 1%, three equivalence ratios, kept constant between cyclopentane and tetrahydrofuran, were studied (0.5, 1, and 2), whereas three Xfuel/XO2 were investigated when Xfuel = 2%. A detailed kinetic mechanism was developed to reproduce cyclopentane and tetrahydrofuran auto‐ignition. The agreement between our experimental results and the modeling is very good. This mechanism was used to explain the similarities and differences observed between cyclopentane and tetrahydrofuran auto‐ignition.

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An experimental and kinetic modeling study of cyclopentane and dimethyl ether blends

Cited by 19 publications

References 84 publications

Review of the Influence of Oxygenated Additives on the Combustion Chemistry of Hydrocarbons

Review of the Influence of Oxygenated Additives on the Combustion Chemistry of Hydrocarbons

Combustion Performance and Low NOx Emissions of a Dimethyl Ether Compression-Ignition Engine at High Injection Pressure and High Exhaust Gas Recirculation Rate

Comparative study of the high‐temperature auto‐ignition of cyclopentane and tetrahydrofuran

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