Measurement of the Speed of Sound in Near-Critical and Supercritical <i>n</i>-Heptane at Temperatures from (513.40 to 650.90) K and Pressures from (2.5 to 10.0) MPa

Zhang, Ying; Chen, Yutian; Zhan, Taotao; He, Maogang

doi:10.1021/acs.jced.8b00212

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…The essential measurement principle and relevant apparatus for the BLS method are given above. The description of the measurement theory can be found in our previous papers − and in various fundamental studies. − …”

Section: Methodsmentioning

confidence: 99%

“…The Brillouin light scattering (BLS) method, as an effective and noncontact measurement technique, has been successfully applied for the measurement of the speed of sound. Our group has employed the BLS method to measure the speed of sound in various liquids, such as methyl caprate, 16 n-heptane, 17 and di-isopropyl ether. 18 This work determined the speed of sound in methyl caprylate in the temperature range of 298.22−608.38 K along six isobaric lines at 0.1, 1.0, 3.0, 5.0, 7.0, and 10.0 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of the Speed of Sound in Methyl Caprylate from 298.22 to 608.38 K and up to 10 MPa

et al. 2019

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Methyl caprylate is expected to be one of the main components of biodiesel due to its high cetane number and good oxidation stability. Details of the experimental speeds of sound in methyl caprylate are very scarce, especially in high-temperature regions. Therefore, the speed of sound in liquid methyl caprylate was measured by the Brillouin light scattering method in the temperature range of 298.22–608.38 K and at pressures of up to 10 MPa. The relative expanded uncertainty of the speed of sound is estimated to be less than 1.32% (coverage factor k = 2). The variation of the speed of sound with the temperature and pressure was analyzed. Besides, the correlation for the speed of sound as a function of temperature and pressure is presented based on the experimental data. The absolute average of relative deviation between the experimental data and the calculated results is 0.29%.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement of the Speed of Sound in Methyl Caprylate from 298.22 to 608.38 K and up to 10 MPa

et al. 2019

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“…The measurement apparatus applied to study the speed of sound in ethyl nonanoate has been described in detail in previous papers. , Here, only the measurement procedure and related instruments are introduced briefly. A continuous-wave diode-pumped solid-state laser (Cobolt Samba) is applied as the light source, and the wavelength of the laser beam is 532 nm (λ 0 ) with an uncertainty of 0.03 nm.…”

Section: Experimental Sectionmentioning

confidence: 99%

Speed of Sound and Derived Properties of Ethyl Nonanoate

et al. 2019

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Ethyl nonanoate is a promising component of biodiesel with a satisfactory cetane number and reactivity. The speeds of sound in ethyl nonanoate were measured by the Brillouin light scattering (BLS) method within the temperatures from 295.24 to 593.15 K and at pressures up to 10 MPa. The relative expanded uncertainty (k = 2) of our BLS experimental system is estimated to be less than 0.7%. The densities of ethyl nonanoate were measured using a vibrating tube densimeter at atmospheric pressure in the temperature range of 293.15–353.15 K, and the absolute average relative deviation between the experimental densities and the literature data is 0.12%. For temperatures between 303.15 and 353.15 K and at pressures up to 10 MPa, these measurements were used to calculate densities, isobaric heat capacities, and indirect derivative properties including the isobaric thermal expansion, the isothermal compressibility, the isentropic compressibility, and the internal pressure. The comparison between the calculated isobaric heat capacities and the literature values shows a satisfactory agreement with an absolute average relative deviation of 0.18% and a maximum deviation of 0.38%. At the end, the dependences of internal pressure of ethyl nonanoate on temperature and pressure were found to be in accordance with those of ethyl caprylate and ethyl caprate.

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Measurement of the speed of sound in supercritical n–hexane at temperatures from (509.17–637.99) K and pressures from (3.5–7.5) MPa

Zhan

Zhang

Chen

et al. 2019

Fluid Phase Equilibria

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Measurement of the Speed of Sound in Near-Critical and Supercritical n-Heptane at Temperatures from (513.40 to 650.90) K and Pressures from (2.5 to 10.0) MPa

Cited by 6 publications

References 27 publications

Measurement of the Speed of Sound in Methyl Caprylate from 298.22 to 608.38 K and up to 10 MPa

Measurement of the Speed of Sound in Methyl Caprylate from 298.22 to 608.38 K and up to 10 MPa

Speed of Sound and Derived Properties of Ethyl Nonanoate

Measurement of the speed of sound in supercritical n–hexane at temperatures from (509.17–637.99) K and pressures from (3.5–7.5) MPa

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