Speed of sound measurement and mixing-rule evaluation of (n-butanol + n-heptane) binary mixtures

Zhang, Hengfei; Zhan, Taotao; Chen, Junshuai; Li, Xin; Zhang, Ying; He, Maogang

doi:10.1016/j.jct.2022.106817

Cited by 3 publications

(3 citation statements)

References 72 publications

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“…The Brillouin frequency shift can be accurately measured by using a Fabry–Perot interferometer (FPI) that has a FSR of 1.5 GHz. The detailed equipment information used in the system, as demonstrated in Figure S4 has been introduced in our earlier papers. ,, In the Supporting Information, Figure S5 shows the schematics of the temperature and pressure control system.…”

Section: Methodsmentioning

confidence: 99%

“…The detailed equipment information used in the system, as demonstrated in Figure S4 has been introduced in our earlier papers. 39,45,53 In the Supporting Information, Figure S5 shows the schematics of the temperature and pressure control system.…”

Section: Measurement Methodology Andmentioning

confidence: 99%

“…The thermodynamic properties of 1-butanol + ethyl laurate binary mixtures have a substantial effect on fuel injection, which in turn affects combustion efficiency and engine performance. − Among these properties, the speed of sound plays a crucial role as it primarily determines the opening and closing time of the needle valve, pressure wave propagation from the high-pressure pipe to the needle valve, and the injection time. − Besides, the speed of sound is essential for comprehending the intermolecular interactions in binary and ternary liquid mixtures. − The speed of sound of ethyl laurate or 1-butanol has been measured by many scholars. The previous literature reports on the speed of sound for 1-butanol or ethyl laurate are listed in Table .…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Properties of 1-Butanol + Ethyl Laurate Binary Mixtures by Combining Experimental Speeds of Sound with Volume Translated Peng–Robinson Equation of State

Dong,

Zhan,

et al. 2023

J. Chem. Eng. Data

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The speeds of sound in 1-butanol + ethyl laurate binary mixtures determine the injection time and combustion characteristics of diesel engine. The speed of sound of 1-butanol + ethyl laurate binary mixture system was measured by the Rayleigh–Brillouin light scattering method at temperatures from 293 to 520 K and pressures from 0.1 to 7.5 MPa. A set of parameters was fitted using 1-butanol and ethyl laurate experiment data for the volume-translated Peng–Robinson (VTPR-BE) equation of state (EoS), taking into account the temperature influence on the binary interaction parameter k ij . Increasing the order of the temperature function of k ij can reduce the calculation deviation of the VTPR-BE EoS. However, beyond the second-order term, further increases in order do not yield significant improvements in accuracy. By adopting the second-order k ij form, the density and the speed of sound of 1-butanol + ethyl laurate binary mixture system were calculated using the VTPR-BE EoS. The average absolute relative deviation is 1.05% for density and 3.90% for the speed of sound. Especially, when the molar fraction of 1-butanol is 0.5, the absolute relative deviation of the speed of sound is 1.79%.

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Section: Methodsmentioning

confidence: 99%

Section: Measurement Methodology Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Properties of 1-Butanol + Ethyl Laurate Binary Mixtures by Combining Experimental Speeds of Sound with Volume Translated Peng–Robinson Equation of State

Dong,

Zhan,

et al. 2023

J. Chem. Eng. Data

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A state-of-the-art theoretical method for estimating ultrasonic velocity in ionic liquid mixtures: An extension of McAllister's interaction model

Sirohi,

Upmanyu,

Kumar

et al. 2024

Computational and Theoretical Chemistry

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Experimental Studies on the Use of Methanol-Butanol Blends in a Hot Surface Ignition Engine

Krishnan¹,

Elango²,

Ramesh³

2023

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">The property of methanol to surface ignite can be exploited to use it in a diesel engine even though its cetane number is very low. Poor lubricity of methanol is still an issue and special additives are needed in order to safeguard the injection system components. In this work a common rail three cylinder, turbocharged diesel engine was run in the glow plug based hot surface ignition mode under different injection strategies with methanol as the main fuel in a blend with n-butanol. n-Butanol was used mainly to enhance the viscosity and lubricity of the blend. The focus was on the effect of different injection strategies. Initially three blends with methanol to n-butanol mass ratios of 60:40, 70:30 and 80:20 were evaluated experimentally with single pulse fuel injection. Subsequently the selected blend of 70:30 was injected as two pulses (with almost equal mass shares) with the gap between them and their timing being varied. Finally the effect of mass share of the injection pulses was evaluated. All the experiments were done at a speed of 1800 rpm, Brake Mean Effective Pressure (BMEP) of 8 bar and injection pressure of 850 bar and performance, emissions and combustion parameters were analyzed.</div><div class="htmlview paragraph">Higher methanol shares increased the efficiency because of controlled combustion rates and proper combustion phasing. Enhancing the methanol share, due to its high latent heat of vaporization lowered the temperatures and the Oxides of Nitrogen (NO<sub>x</sub>) levels with near zero smoke levels. However, Hydrocarbon emission (predominantly formaldehyde and methanol) was found to be higher but it was possible to reduce it by using a diesel oxidation catalyst. Double pulse injection resulted in an improvement in the brake thermal efficiency due to better combustion phasing. Reduced the rate of pressure rise and NO<sub>x</sub> emissions were also observed. An almost equal share between the two injection pulses was found to be acceptable and the efficiency was better than the base diesel engine with negligible smoke and lower NO<sub>x</sub> levels.</div></div>

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Speed of sound measurement and mixing-rule evaluation of (n-butanol + n-heptane) binary mixtures

Cited by 3 publications

References 72 publications

Thermodynamic Properties of 1-Butanol + Ethyl Laurate Binary Mixtures by Combining Experimental Speeds of Sound with Volume Translated Peng–Robinson Equation of State

Thermodynamic Properties of 1-Butanol + Ethyl Laurate Binary Mixtures by Combining Experimental Speeds of Sound with Volume Translated Peng–Robinson Equation of State

A state-of-the-art theoretical method for estimating ultrasonic velocity in ionic liquid mixtures: An extension of McAllister's interaction model

Experimental Studies on the Use of Methanol-Butanol Blends in a Hot Surface Ignition Engine

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