Experimental and kinetic modeling study of methyl butanoate and methyl butanoate/methanol flames at different equivalence ratios and C/O ratios

Yu, Weidong; Chen, Gen; Huang, Zuohua; Chen, Zhaoyang; Gong, Jing; Yang, Jiuzhong; Wang, Zhandong; Qi, Fei

doi:10.1016/j.combustflame.2011.05.018

Cited by 24 publications

(19 citation statements)

References 52 publications

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“…But, Khosousi et al detected that the soot reduction with ethanol addition in co‐flow diffusion flames was mainly due to the dilution of aromatics. Yu et al studied the soot precursors' characteristics of methanol‐methyl butanoate blends in laminar premixed flames and concluded that the carbon‐to‐oxygen (C/O) ratio strongly influences the formation of soot precursors. Singh et al.…”

Section: Introductionmentioning

confidence: 99%

“…But, Khosousi et al [16] detected that the soot reduction with ethanol addition in coflow diffusion flames was mainly due to the dilution of aro-matics. Yu et al [17] studied the soot precursors' characteristics of methanol-methyl butanoate blends in laminar premixed flames and concluded that the carbon-to-oxygen (C/O) ratio strongly influences the formation of soot precursors. Singh et al [18] found that butane can form more soot than butanol in non-premixed counter-flow flames and found that the difference of molecular structures is also an important factor influencing soot forming.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Alcohol Addition to Gasoline on Soot Distribution Characteristics in Laminar Diffusion Flames

Liu

Hua

et al. 2018

Chem Eng & Technol

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Alcohols are widely used as alternative fuel for spark ignition engines to reduce soot emission. 2D soot distributions of alcohols‐gasoline blends were studied in laminar diffusion flames by two‐color laser‐induced incandescence technique. The soot volume fraction decreases significantly with the alcohol blending ratio. At the same blending ratio, the soot‐reducing ability declined with the carbon length of the alcohol, but the reducing effect for short‐chain alcohols, i.e., methanol and ethanol, deteriorated at high blending ratio while it remained constant for the long‐chain alcohol n‐butanol. At fixed oxygen content, the soot‐reducing ability of a short‐chain alcohol is still higher than that of a long‐chain alcohol, i.e., not only the oxygen content but also the molecular structure dominates the soot‐reducing ability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Alcohol Addition to Gasoline on Soot Distribution Characteristics in Laminar Diffusion Flames

Liu

Hua

et al. 2018

Chem Eng & Technol

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“…Of particular interest is the autoignition response, which is the fundamental basis for classification of diesel fuels in terms of their cetane numbers. The ability to predict both the global combustion properties and the [3][4][5][6][7][8][9][10]. It is well established that chemical kinetic models have a hierarchical structure in terms of carbon numbers [11].…”

Section: Introductionmentioning

confidence: 99%

Autoignition of methyl butanoate under engine relevant conditions

Kumar

Sung

2016

Combustion and Flame

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This study reports the autoignition delay times of methyl butanoate in argon-air (i.e. Ar/O 2 =3.76 by mole) mixtures under thermodynamic conditions relevant to compression ignition engines, using a rapid compression machine (RCM). The ignition delay times were obtained for the compressed temperature range of 833-1112 K and compressed pressures corresponding to 15, 30, 45, and 75 bar. In addition, the effect of fuel mole fraction on ignition delay times were experimentally studied by covering equivalence ratios corresponding to 0.25, 0.5, and 1.0 under realistic fuel loadings without additional dilution. For the range of conditions investigated, the ignition delay times exhibit an Arrhenius dependence on temperature and an inverse relationship with the compressed pressure. No evidence of two-stage ignition was observed in the current experiments, nor was a negative temperature coefficient trend seen in the ignition delay times. The experimental results were compared to zero-dimensional simulations taking into account the full compression stroke and the heat loss characteristics of the RCM, using chemical kinetic models reported in the literature. The literature models were found to predict significantly higher reactivity when compared to the current experiments. Chemical kinetic analysis was then conducted to identify the reactions responsible for the mismatch between the experiments and the simulated results. Key reactions that could help obtain a better match between the experimental and simulated results were identified using both brute-force and global sensitivity analyses. In view of the large uncertainties associated with the low-temperature chemistry of methyl butanoate, further studies are needed to update the kinetic parameters of the key reactions in order to improve the model comprehensiveness.

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“…The mole fraction of H 2 is slightly overpredicted for L < 5 mm. The overprediction of the H 2 concentration can also be seen in the computational results by Yu et al 14 19 and MD 43 in an counterflow flame burner at atmospheric pressure. The burner contained a fuel stream inlet and an oxidizer stream inlet, spaced 20 mm apart.…”

Section: Energy and Fuelsmentioning

confidence: 61%

Construction of Skeletal Oxidation Mechanisms for the Saturated Fatty Acid Methyl Esters from Methyl Butanoate to Methyl Palmitate

Chang

Jia

et al. 2015

Energy Fuels

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A series of skeletal oxidation mechanisms for the saturated fatty acid methyl esters (FAMEs) from methyl butanoate to methyl palmitate were developed on the basis of a decoupling methodology with special emphasis on enginerelevant conditions from low to high temperatures at high pressures. When detailed H 2 /CO/C 1 , reduced C 2 −C 3 , and skeletal C 4 −C n submechanisms are introduced, the final mechanism consists of 42 species and around 135 reactions for each methyl ester. Both the high-temperature reactions of the methyl ester moiety and the low-temperature reactions of the aliphatic chain of the ester are included in the mechanism. The skeletal mechanisms were verified against experimental data in shock tubes, jet-stirred reactors, flow reactors, and premixed and opposite flames over the temperatures from 500 to 1700 K at pressures of 1−50 atm from fuel-lean to fuel-rich mixtures. An overall satisfactory agreement between the measurements and computational results was achieved for all of the saturated methyl esters, especially for the large saturated methyl esters with a long aliphatic main chain. The results also indicate that the ignition delay time and the consumption of reactants could be reproduced by employing a skeletal C 4 −C n submechanism reasonably well. In addition, the evolution of major products and flame propagation and extinction characteristics were satisfactorily reproduced because the detailed H 2 /CO/C 1 mechanism was used. The compact size makes it easy to integrate the mechanism into multi-dimensional computational fluid dynamics (CFD) simulation.

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Experimental and kinetic modeling study of methyl butanoate and methyl butanoate/methanol flames at different equivalence ratios and C/O ratios

Cited by 24 publications

References 52 publications

Effect of Alcohol Addition to Gasoline on Soot Distribution Characteristics in Laminar Diffusion Flames

Effect of Alcohol Addition to Gasoline on Soot Distribution Characteristics in Laminar Diffusion Flames

Autoignition of methyl butanoate under engine relevant conditions

Construction of Skeletal Oxidation Mechanisms for the Saturated Fatty Acid Methyl Esters from Methyl Butanoate to Methyl Palmitate

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