Ethyl Tertiary Butyl Ether Ignition and Combustion Using a Shock Tube and Spherical Bomb

Yahyaoui, Mohammed; Chaumeix, Nabiha; Dagaut, Philippe; Paillard, C.

doi:10.1021/ef8003448

Cited by 20 publications

(17 citation statements)

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“…Isoparaffins are included up to 30 % and olefins up to 18 % in a commercial gasoline. But apart from a preliminary study of the autoignition of a iso-octane/1-hexene mixture in a shock tube [9], the oxidation of mixtures containing these two types of compounds has not yet been much investigated.…”

Section: Introductionmentioning

confidence: 99%

Experimental and modeling study of the autoignition of 1-hexene/isooctane mixtures at low temperatures

Vanhove

Minetti

Touchard

et al. 2006

Combustion and Flame

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Autoignition delay times have been measured in a rapid compression machine at Lille at temperatures after compression from 630 to 840 K, pressures from 8 to 14 bar, Φ = 1 and for a iso-octane/1-hexene mixture containing 82 % iso-octane and 18 % 1-hexene. Results have shown that this mixture is strongly more reactive than pure iso-octane, but less reactive than pure 1-hexene. It exhibits a classical low temperature behaviour, with the appearance of cool flame and a negative temperature coefficient region. The composition of the reactive mixture obtained after the cool flame has also been determined. A detailed kinetic model has been obtained by using the system EXGAS, developed in Nancy for the automatic generation of kinetic mechanisms, and an acceptable agreement with the experimental results has been obtained both for autoignition delay times and for the distribution of products.A flow rate analysis reveals that the crossed reactions between species coming from both reactants (like H-abstractions or combinations) are negligible in the main flow consumption of the studied hydrocarbons. The ways of formation of the main primary products observed and the most sensitive rate constants have been identified.Keywords : mixtures, iso-octane, 1-hexene, rapid compression machine, autoignition, modeling. 2 INTRODUCTIONFuels usually contain six main classes of organic compounds : paraffins, isoparaffins, olefins, naphtenes, aromatics (including polyaromatic compounds) and oxygenates. Commercial gasoline contains approximately 150 different molecules belonging to these 6 classes of organic compounds. Since the end of the last decade, a great number of experimental and theoretical studies has made it possible to simulate the combustion of model molecules taken individually and to predict the formation of characteristic pollutants, as well as autoignition phenomena.Nevertheless, very few studies have been devoted up to now to the case of mixtures containing molecules of several classes of organic compounds. The major part of the studies published on mixture oxidation concerns mixtures of a paraffin and an isoparaffin, an ether or an aromatic compound. The n-heptane/iso-octane mixture is the one which has been the most extensively investigated. It has been experimentally studied in a jet-stirred reactor [1], in a shock tube [2] and in a rapid compression machine [3] and several models for its oxidation have been proposed [1,3,4]. In the case of paraffin/ether mixtures, the autoignition of a propane/MTBE mixture has been studied in a shock tube [5], while the oxidation of n-heptane/MTBE and n-heptane/ETBE mixtures has been investigated in a jet-stirred reactor [6]; in both cases, a model has been proposed [5,6]. The effect of the addition of toluene to the oxidation of alkanes has been investigated in the case of n-butane in a plug flow reactor [7] and in the case of n-heptane in a jet-stirred flow reactor [8]. The global conclusion of these studies is that crossed reactions are negligible and that the synergy effect occurring...

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Section: Introductionmentioning

confidence: 99%

Experimental and modeling study of the autoignition of 1-hexene/isooctane mixtures at low temperatures

Vanhove

Minetti

Touchard

et al. 2006

Combustion and Flame

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“…Flammability limits (%) 1.4-7.6 [54] 4-75 [54] 7.3-36 [54] 4.3-19 [54] 1.2-10.9 [62] 1.4-11.2 [62] 5-15 [54] 1.5-8.5 [63] 1.2-7.7 [64] 1.9-14 [65] NA Stoichiometric AFR 14.7 34.3 [54] 6.4 9 11.1 11.1 17.2 [55] 11.7 12.2 10.1 10.7 Laminar flame speed (m/s) 0.37-0.43 [66] 1.85 [66] 0.56 [67] 0.39 [66] 0.45 [68] 0.48 [68] 0.38 [66] 0.35 [69] 0.30 [70] 0.47 [71] 0.38 [72] Adiabatic flame temperature @ 1 bar, 20 °C, λ=1 2346 2377 [73] 2216 2310 2372 2388 2222 [73] 2623…”

Section: Renewable Fuels For Si Enginesmentioning

confidence: 99%

Dual injection: An effective and efficient technology to use renewable fuels in spark ignition engines

Huang

Surawski

Zhuang

et al. 2021

Renewable and Sustainable Energy Reviews

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Modern spark ignition engines mostly use one injection system to deliver gasoline into the combustion chamber, using either direct injection or port fuel injection. Both technologies have their respective advantages. To integrate their advantages and to promote the use of renewable fuels, dual injection engines are in development in recent years. Dual injection represents an advanced combustion system and is a novel technology to address the urgent issues of sustainability and environmental protection. This study reviews the state-of-the-art research on dual injection spark ignition engines with a focus on renewable fuels, their advantages and engine performance. The main advantages of dual injection include greater control flexibility, enhanced cooling effect, knock mitigation, engine downsizing, extended lean-burn limits, higher thermal efficiency and reductions of several emission species. The most promising renewable fuels for dual injection are ethanol, methanol and hydrogen. Each renewable fuel is aimed at different advantages of dual injection.Alcohol-gasoline dual injection provides great anti-knock ability by taking advantage of alcohols' large enthalpies of vaporisation and high octane numbers, while hydrogen-gasoline dual injection provides extended lean-burn limits by taking advantage of hydrogen's low ignition energy, wide flammability limit and high flame speed. Direct injection of renewable fuels is the optimal injection strategy because it effectively utilises the strong cooling effect of alcohols or avoids the volumetric efficiency reduction and preignition of hydrogen. Dual injection generally demonstrates higher thermal efficiency than single injection.In addition, dual injection effectively reduces particulate emissions while there are usually trade-offs among gaseous emissions.

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“…The only available determination of laminar burning velocity of pure ethyl tertbutyl ether (Yahyaoui et al 2008) reports a maximum value of 33 cm/s at equivalence ratio 1.1 at standard conditions. Measurements were performed using a spherical flame and shadowgraphy in the range of equivalence ratios of 0.5-1.5.…”

Section: Ethyl Tert-butyl Ethermentioning

confidence: 99%

Flame Studies of Oxygenates

Nilsson

Konnov

2013

Cleaner Combustion

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This chapter presents a comprehensive review of flame studies performed on oxygenated hydrocarbons or oxygenates of general formula C x H y O z . In particular those studies in which the authors have measured laminar flame speeds or have concentrated on speciation in flames. It is the first time that such tabulation is performed and summarizes the work carried out since the 1950s. In addition, the methods employed in determining flame speeds are outlined and their strengths and weaknesses highlighted. In a similar fashion the various diagnostic methods for measuring species concentrations in situ are reviewed. were focused on extension of the list of detectible species and on the achievements in quantitative measurements. In most cases, spectroscopic techniques were tested in flames of methane and other conventional fuels, yet flames of oxygenated species were also visited (Desgroux et al. 1994). 240

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Ethyl Tertiary Butyl Ether Ignition and Combustion Using a Shock Tube and Spherical Bomb

Cited by 20 publications

References 16 publications

Experimental and modeling study of the autoignition of 1-hexene/isooctane mixtures at low temperatures

Experimental and modeling study of the autoignition of 1-hexene/isooctane mixtures at low temperatures

Dual injection: An effective and efficient technology to use renewable fuels in spark ignition engines

Flame Studies of Oxygenates

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