JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Junshuai Chen,Qi Zhou,Taotao Zhan,Maogang He,Ying Zhang
Methyl hexanoate, which was found to be the simplest methyl ester to present a strong cool flame behavior, is expected to be one of the main components of biodiesels. Details of the experimental speeds of sound in methyl hexanoate are scarce up to now. Therefore, the speed of sound in liquid methyl hexanoate was measured by the Brillouin light scattering method in the temperature range of 297.83–588.07 K and at pressures of up to 10 MPa. The relative uncertainty of the speed of sound experimental system is estimated to be less than 0.43%, and when considering the impurity of the sample, the relative uncertainty is 0.47%. 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 0.44%.
研究领域:
化学工程
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Ying Zhang,Taotao Zhan,Junshuai Chen,Yutian Chen,Maogang He
1-Methoxy-2-propanol (PGMME) is widely used as an oxygenated additive for diesel fuel. Experimental speed of sound data for PGMME are very scarce. Therefore, the speed of sound in PGMME was measured by the Brillouin light scattering (BLS) method in the temperature range from (306.81 to 648.29) K and pressures up to 10 MPa, including saturated liquid/vapor, liquid, and near-critical and supercritical fluid states. The relative expanded uncertainty (k = 2) of our BLS experimental system is estimated to be less than 1.4%. The variation of the speed of sound with the temperature and pressure is illustrated. Moreover, correlations for experimental speeds of sound in the saturated liquid/vapor and liquid are presented. The correlations represent the experimental data with average absolute deviations of 0.24% for the saturated liquid, 0.19% for the saturated vapor, and 0.36% for the liquid region.
研究领域:
热力学
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流体物理
·
物理化学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Junshuai Chen,Ying Zhang,Taotao Zhan,Qi Zhou,Tian Lan,Maogang He
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%.
研究领域:
物理化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Song Feng,Zhaohui Liu,Qincheng Bi,Hui Pan
The dynamic viscosities of n-dodecane were measured at temperatures between 303.3 and 693.3 K and pressures up to 10.0 MPa using a dual-capillary viscometer. The accuracy of the dual-capillary viscometer was improved by considering centrifugal effects and the thermal expansion of the capillary. The combined relative standard uncertainty in the dynamic viscosity was calculated to be 0.58–2.92 %. This study provides new data to check the accuracy of Huber’s correlations at supercritical pressures, and a small proportion of the data points at supercritical conditions where few experimental data have been reported. The average absolute deviation between the experimental data and the calculated data from Huber’s correlations is 0.97%, and the maximum absolute deviation is 6.79%. In the near-critical and supercritical region, the accuracy of viscosities of n-dodecane needs more experimental data for verification and to extend the theories.
研究领域:
化学工程
·
物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
·
IF 2.196
Ying Zhang,Xiong Zheng,Maogang He,Lili Liang,Yutian Chen
Oxygenates are usually used as fuel additives. Recently, di-isopropyl ether (DIPE) has been considered as the potential fuel additive for the replacement of methyl tert-butyl ether (MTBE). So it is essential to research its thermophysical properties. In this paper, the speed of sound in DIPE was measured from 303.15 K to 673.15 K up to 10 MPa using Brillouin light scattering (BLS), including saturated liquid/vapour, and the liquid and supercritical regions. The saturated liquid/vapour and single phase liquid results were fitted as functions of temperature and pressure. The correlations represent the data with AADs of 0.62% for the saturated liquid, 0.44% for the saturated vapour and 0.73% for the liquid, respectively. Moreover, the variation of speed of sound with temperature and pressure was also analysed.
研究领域:
化学工程
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物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2014
·
IF 2.045
Libin Chen,Ying Zhang,Sheng Wang,Xiong Zheng,Maogang He
The thermal diffusivities of 2-methoxy-2-methylpropane (MTBE, mass purity, > 0.990, GC) were measured by using the dynamic light scattering method at T = (303.15 to 493.15) K and p = (1.5 to 10) MPa, including saturated liquid, saturated vapor, and compressed liquid. The expanded relative uncertainty in thermal diffusivity was estimated to be less than 2.0 % over the entire investigated range. The polynomial representation for thermal diffusivity of MTBE was proposed by employing the experimental results. Comparing the calculated results with the experimental data, the average absolute deviations are 0.59 % for saturated liquid, 0.38 % for saturated vapor, and 0.43 % for compressed liquid.
研究领域:
化学工程
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 5
·1135
·
IF 3.057
Lei Zha,Heping Li,Ning Wang
TC11 alloy is a promising structural material, and has a wide range of applications in many corrosive and high temperature hydrothermal systems. The passive film has an important influence on its electrochemical behavior. In this study, in-situ electrochemical methods (that is, open circuit potential (OCP), linear polarization (LP) and electrochemical impedance spectroscopy (EIS)) were used to monitor the long period electrochemical behavior of TC11 alloy in 0.01 M Na2SO4solution at 300 °C/10 MPa. The growth kinetics of the passive film was mainly studied. The correlation between the evolution of the electrochemical behavior and the growth of the oxide film was discussed. The results showed that although the OCP gradually stabilized after twenty thousand seconds, henceforth the polarization resistance (Rp) was still increasing due to the thickening of the passive film. An equivalent circuit was proposed to fit the EIS experimental data, leading to determination of film capacitance and film resistance. Besides, the electrochemical data was interpreted in terms of the point defect model (PDM). The EIS results are consistent with theRpresults.Keywords:TC11 alloy;passive film;time;high temperature and pressure;EIS;PDM
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FLUID PHASE EQUILIBRIA
·
2021
·
IF 2.775
Junshuai Chen,Hongwei Xing,Taotao Zhan,Libin Chen,Maogang He,Ying Zhang
Ethanol is a common industrial substance and widely applied in technological and scientific applications, of which the thermophysical properties especially near the critical point are scarce. In this work, the thermal diffusivity of ethanol was determined by the dynamic light scattering method in the temperature ranging from (293 to 564) K and along six isobaric lines including 0.1, 2.5, 5, 6.2, 7.5 and 10 MPa. The relative uncertainty of the thermal diffusivity experimental system is estimated to be less than 2.6% for coverage factor of k = 2 with the level of confidence 0.95. The variation of thermal diffusivity with the temperature and pressure was analyzed. In addition, the comparison between the experimental data and the calculated values from thermal conductivity was made, and the absolute average of relative deviation (AARD) between them is 0.96%.
研究领域:
化学工程
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Yuhang Chen,Long Cheng,Zhao Lei,Yuqi Su,Maogang He,Ying Zhang
Transport properties, including thermal diffusivity and the Fick diffusion coefficient, are key parameters for optimizing chemical processes and ensuring production safety. In this work, the thermal diffusivity and Fick diffusion coefficient of the n–heptane + n–decane binary mixture were measured by dynamic light scattering at n–heptane amount fractions from 0.25 to 0.75. Measurements were performed along five isobars at 0.1, 2.5, 5.0, 7.5, and 10 MPa. Thermal diffusivity was determined over 298.15–523.15 K, except at 0.1 MPa, where the temperature range was limited to 298.15–373.15 K, while Fick diffusion coefficients were obtained from 298.15 to 373.15 K. The relative expanded uncertainties in thermal diffusivity and Fick diffusion coefficient were estimated to be 0.094 and 0.146, respectively, at a confidence level of 0.95 (k = 2). The effects of temperature, pressure, and composition on thermal diffusivity and Fick diffusion coefficient were analyzed, aiming to offer guidance for optimizing the design of industrial processes and ensuring operational safety and reliability.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Yuanming Fu,Xianyang Meng,Ximei Liang,Jiangtao Wu
The density and viscosity of liquid 1-dodecanol and 1,12-dodecanediol were reported, which were obtained simultaneously by using a vibrating-wire viscometer. The measurements were determined at temperatures from 298.15 to 573.15 K for 1-dodecanol and 373.15 to 573.15 K for 1,12-dodecanediol and at pressures from 0.1 to 10 MPa. The combined expanded uncertainties (k = 2) of the reported data for density and viscosity were estimated to be 0.26% and 2.1%, respectively. The density and viscosity data obtained in this work were correlated with the Tait-type equation and Andrade–Tait equation, respectively. The average absolute percentage deviation of the density data from the correlations were 0.08% for 1-dodecanol and 0.06% for 1,12-dodecanediol, and the average absolute percentage deviation of the viscosity data from the correlations were 0.64% for 1-dodecanol and 0.67% for 1,12-dodecanediol. The correlations were also used to compare the present results with the available literature data. An acceptable agreement between the present results and the literature data was observed. Finally, the derived properties of isobaric expansibility and isothermal compressibility were derived based on the Tait-type equation of this work.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2016
·
IF 1.835
Ying Zhang,Xiong Zheng,Maogang He,Yutian Chen
Ethers are usually used as gasoline additives, and now 2-methoxy-2-methylpropane (MTBE) is the most widely used fuel additive. The speed of sound in MTBE with a specified mass purity higher than 0.990 (GC) was measured by the Brillouin light scattering method in the temperature range of 293.15–673.15 K and for pressures up to 10 MPa, including saturated liquid/vapor, liquid, and supercritical fluid. The correlations for the speed of sound in saturated liquid/vapor and liquid were proposed by employing the experimental results. Comparing the calculated results with the experimental data, the average absolute deviations are 0.50% for saturated liquid, 0.20% for saturated vapor, and 0.24% for liquid. The tendency of speed of sound to temperature and pressure was also analyzed.
研究领域:
物理化学
·
燃料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Xiong Zheng,Ying Zhang,Maogang He,Lili Liang,Xinxin He
Fatty acid ethyl esters (FAEEs) are the main components in some biodiesels, which are important alternatives of fossil fuels. In this paper, we carry out the measurements of the speed of sound in two FAEEs at the temperatures from (293.15 to 473.15) K and at the pressures up to 10 MPa, including saturated liquid and compressed liquid. The relative expanded uncertainty in the speed of sound is estimated to be less than 1.0% with coverage factor of k to be 2. The data in saturated liquid and compressed liquid are fitted into polynomials. For saturated liquid, the D AAD is 0.16% for ethyl hexanoate and 0.09% for ethyl octanoate. For compressed liquid, the D AAD is 0.31% for ethyl hexanoate and 0.16% for ethyl octanoate. The data were also used to assess the predictive ability of Wada’s model.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）