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Mutual diffusion coefficients of 3–methyl–1–butanol + n–heptane and 2–methyl–1–butanol + n–heptane from 288.15 K to 318.15 K EI Scopus SCIE
期刊论文 | 2019 , 131 , 97-103 | Journal of Chemical Thermodynamics
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Abstract :

© 2018 Elsevier Ltd The mutual diffusion coefficients of binary mixtures, 3–methyl–1–butanol + n–heptane and 2–methyl–1–butanol + n–heptane, were measured over the mass fraction from 0.05 to 0.95 at temperatures T = 288.15 K, 298.15 K, 308.15 K and 318.15 K under atmospheric pressure. A digital holographic interferometry system was employed for the measurements and its expanded relative uncertainty of mutual diffusion coefficients was estimated to be less than 2.4%. The influences of temperature and composition on the mutual diffusion coefficients were investigated. Furthermore, the correlations of the mutual diffusion coefficients were fitted to the experimental data as functions of the mass fraction and temperature. The correlations represent the data with the absolute average of relative deviations (AARDs) of 0.88% for 3–methyl–1–butanol + n–heptane and 0.89% for 2–methyl–1–butanol + n–heptane, respectively.

Keyword :

2-Methyl-1-butanol 3-Methyl-1-butanol Mutual diffusion coefficient n-Heptane

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GB/T 7714 Zhang, Ying , Zhan, Taotao , Chen, Junshuai et al. Mutual diffusion coefficients of 3–methyl–1–butanol + n–heptane and 2–methyl–1–butanol + n–heptane from 288.15 K to 318.15 K [J]. | Journal of Chemical Thermodynamics , 2019 , 131 : 97-103 .
MLA Zhang, Ying et al. "Mutual diffusion coefficients of 3–methyl–1–butanol + n–heptane and 2–methyl–1–butanol + n–heptane from 288.15 K to 318.15 K" . | Journal of Chemical Thermodynamics 131 (2019) : 97-103 .
APA Zhang, Ying , Zhan, Taotao , Chen, Junshuai , He, Maogang . Mutual diffusion coefficients of 3–methyl–1–butanol + n–heptane and 2–methyl–1–butanol + n–heptane from 288.15 K to 318.15 K . | Journal of Chemical Thermodynamics , 2019 , 131 , 97-103 .
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Speed of Sound Measurement in 1-Methoxy-2-propanol from (306.81 to 648.29) K and up to 10 MPa EI SCIE
期刊论文 | 2019 , 64 (1) , 337-344 | Journal of Chemical and Engineering Data
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Abstract :

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. © 2018 American Chemical Society.

Keyword :

1-methoxy-2-propanol Average absolute deviation Brillouin light scattering Experimental system Oxygenated additive Saturated liquid Temperature and pressures Temperature range

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GB/T 7714 Zhang, Ying , Zhan, Taotao , Chen, Junshuai et al. Speed of Sound Measurement in 1-Methoxy-2-propanol from (306.81 to 648.29) K and up to 10 MPa [J]. | Journal of Chemical and Engineering Data , 2019 , 64 (1) : 337-344 .
MLA Zhang, Ying et al. "Speed of Sound Measurement in 1-Methoxy-2-propanol from (306.81 to 648.29) K and up to 10 MPa" . | Journal of Chemical and Engineering Data 64 . 1 (2019) : 337-344 .
APA Zhang, Ying , Zhan, Taotao , Chen, Junshuai , Chen, Yutian , He, Maogang . Speed of Sound Measurement in 1-Methoxy-2-propanol from (306.81 to 648.29) K and up to 10 MPa . | Journal of Chemical and Engineering Data , 2019 , 64 (1) , 337-344 .
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Performance comparison of two absorption-compression hybrid refrigeration systems using R1234yf/ionic liquid as working pair EI SCIE
期刊论文 | 2019 , 181 , 319-330 | Energy Conversion and Management
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Abstract :

R1234yf (2,3,3,3-tetrafluoroprop-1-ene)/ionic liquid is a kind of environment-friendly working pair, which can overcome the disadvantages of H2O/LiBr and NH3/H2O. In this work, three new working pairs R1234yf/[HMIM][TfO], R1234yf/[HMIM][PF6], R1234yf/[HMIM][BF4] were proposed and new solubility data for them were determined. Two new absorption-compression hybrid refrigeration systems were proposed to improve the cooling performances of the single-effect absorption refrigeration system using R1234yf/[HMIM][TfO], R1234yf/[HMIM][PF6] and R1234yf/[HMIM][BF4] as working pair. The effects of compressor position, compression ratio (r), generation temperature (Tg), evaporation temperature (Te), condensation temperature (Tc) and absorption temperature (Ta) on the coefficient of performance (COP) and circulation ratio (f) were analyzed. Comparison result shows that the two systems can effectively improve the cooling performance of the single-effect absorption refrigeration system including increasing COP, reducing the heat load of condenser and f, and enlarge the operation range of Tg, Ta, and Te. Putting compressor between evaporator and absorber is a better choice than putting it between generator and condenser. R1234yf/[HMIM][TfO] shows better cooling performance than R1234yf/[HMIM][PF6] and R1234yf/[HMIM][BF4] due to its favorable thermophysical properties. © 2018 Elsevier Ltd

Keyword :

Absorption refrigeration system Absorption temperature Absorption-compression Circulation ratio Coefficient of Performance Condensation temperature Evaporation temperature Generation temperature

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GB/T 7714 Liu, Xiangyang , Ye, Zheng , Bai, Lihang et al. Performance comparison of two absorption-compression hybrid refrigeration systems using R1234yf/ionic liquid as working pair [J]. | Energy Conversion and Management , 2019 , 181 : 319-330 .
MLA Liu, Xiangyang et al. "Performance comparison of two absorption-compression hybrid refrigeration systems using R1234yf/ionic liquid as working pair" . | Energy Conversion and Management 181 (2019) : 319-330 .
APA Liu, Xiangyang , Ye, Zheng , Bai, Lihang , He, Maogang . Performance comparison of two absorption-compression hybrid refrigeration systems using R1234yf/ionic liquid as working pair . | Energy Conversion and Management , 2019 , 181 , 319-330 .
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Viscosity of oxygenated fuel: A model based on Eyring's absolute rate theory EI SCIE
期刊论文 | 2019 , 241 , 218-226 | Fuel
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A viscosity model was proposed for oxygenated fuel components; it was based on Eyring's absolute rate theory and a cubic equation of state Soave-Redlich-Kwong. The viscosity was associated with flow energy which could be divided into the activation energy and the vacancy-formation energy, and then a reference state for simplifying the calculation process was introduced in the present model. This work also reported a viscosity database at temperatures from 243.15 K to 413.15 K and pressures up to 200 MPa for 31 oxygenated fuel components containing alcohols, esters and ethers in order to verify the proposed model. The average absolute relative deviations between calculated and experimental data were lower than 2.37%. Furthermore, the free-volume model, which has a similar consideration of flow energy with this work, was chosen to further investigate the performance of the present model, and in general, the present model showed a better accuracy than the free-volume model. Finally, it was shown that the proposed model could be extended to the mixtures successfully. © 2018 Elsevier Ltd

Keyword :

Average absolute relative deviations Calculation process Cubic equation of state Eyring's absolute rate theory Flow energy Free volume models Oxygenated fuel Vacancy formation energies

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GB/T 7714 Zhu, Chenyang , Yang, Feng , Liu, Xiangyang et al. Viscosity of oxygenated fuel: A model based on Eyring's absolute rate theory [J]. | Fuel , 2019 , 241 : 218-226 .
MLA Zhu, Chenyang et al. "Viscosity of oxygenated fuel: A model based on Eyring's absolute rate theory" . | Fuel 241 (2019) : 218-226 .
APA Zhu, Chenyang , Yang, Feng , Liu, Xiangyang , Afzal, Waheed , He, Maogang . Viscosity of oxygenated fuel: A model based on Eyring's absolute rate theory . | Fuel , 2019 , 241 , 218-226 .
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Experimental and correlational study of isobaric molar heat capacities of fatty acid esters: Ethyl nonanoate and ethyl dodecanoate EI Scopus SCIE
期刊论文 | 2019 , 479 , 47-51 | Fluid Phase Equilibria
WoS CC Cited Count: 2 SCOPUS Cited Count: 5
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Abstract :

An experimental study on the isobaric molar heat capacities of ethyl nonanoate and ethyl dodecanoate was performed at temperatures between 303 K and 393 K and at pressures between 0.1 MPa and 25.2 MPa. An increase of isobaric molar heat capacity with temperature increase was observed, and temperature was found to have a greater effect on isobaric molar heat capacity than pressure. Then the isobaric molar heat capacity data of 18 saturated fatty acid methyl and ethyl esters in literature were selected, to get a general correlation for the isobaric molar heat capacity of saturated fatty acid alkyl esters. The average absolute relative deviation and the maximum deviation of the present correlation from experimental data are lower than 0.70% and 3.82%, respectively. At last, to test the predictive ability of the proposed correlation, the heat capacities of ethyl nonanoate and ethyl dodecanoate were calculated. The average absolute relative deviation and the maximum deviation from our experimental results are 0.88% and 2.10%, respectively. © 2018 Elsevier B.V.

Keyword :

Average absolute relative deviations Fatty acid alkyl esters Fatty acid esters Flow method General correlations Isobaric molar heat capacity Predictive abilities Temperature increase

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GB/T 7714 Liu, Xiangyang , Zhu, Chenyang , Yang, Feng et al. Experimental and correlational study of isobaric molar heat capacities of fatty acid esters: Ethyl nonanoate and ethyl dodecanoate [J]. | Fluid Phase Equilibria , 2019 , 479 : 47-51 .
MLA Liu, Xiangyang et al. "Experimental and correlational study of isobaric molar heat capacities of fatty acid esters: Ethyl nonanoate and ethyl dodecanoate" . | Fluid Phase Equilibria 479 (2019) : 47-51 .
APA Liu, Xiangyang , Zhu, Chenyang , Yang, Feng , Su, Chao , He, Maogang . Experimental and correlational study of isobaric molar heat capacities of fatty acid esters: Ethyl nonanoate and ethyl dodecanoate . | Fluid Phase Equilibria , 2019 , 479 , 47-51 .
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Dynamical structure factor of complex plasmas for varying wave vectors SCIE
期刊论文 | 2019 , 26 (2) | PHYSICS OF PLASMAS
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The dynamical structure factor has been reported for three dimensional strongly coupled Yukawa liquids (SCYLs) through state-of-the-art equilibrium molecular dynamics (EMD) simulations in a microcanonical ensemble (NVE). The effects of varying wave vectors (k = 2 pi/L) have been computed along with different arrangements of Coulomb coupling (Gamma) and the Debye screening parameter (kappa) on the dynamical structure-factor S(k, omega) using EMD simulations. Our new investigations of S(k, omega) show that the amplitude of oscillation decreases and the frequency increases with increasing Gamma, respectively, for the SCYLs. Our simulations show that the decreasing behavior is noted for the frequency of plasma S(k, omega) with increasing kappa and system size (N). The obtained EMD results are found to be more efficient and accurate than that of various previous simulation data, and the present EMD approach gives more satisfactory results with appropriate system sizes at high values of k, for a wide range of plasma states (Gamma, kappa). It has been shown that the present density S(k, omega) of SCYLs fluctuates more at intermediate to high Coulomb couplings (average to lower system temperature 1/Gamma) and low values of Debye screening; however, it less fluctuates at higher N and kappa. Published under license by AIP Publishing.

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GB/T 7714 Shahzad, Aamir , Shakoori, Muhammad Asif , He, Mao-Gang et al. Dynamical structure factor of complex plasmas for varying wave vectors [J]. | PHYSICS OF PLASMAS , 2019 , 26 (2) .
MLA Shahzad, Aamir et al. "Dynamical structure factor of complex plasmas for varying wave vectors" . | PHYSICS OF PLASMAS 26 . 2 (2019) .
APA Shahzad, Aamir , Shakoori, Muhammad Asif , He, Mao-Gang , Yang, Fang . Dynamical structure factor of complex plasmas for varying wave vectors . | PHYSICS OF PLASMAS , 2019 , 26 (2) .
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数字全息干涉法测量二元溶液互扩散系数 CSCD PKU
期刊论文 | 2018 , (9) , 3774-3782 | 化工学报
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Abstract :

由一维无限长扩散模型入手,建立了探测光相位与液体互扩散系数之间的数学模型,进而在现有数字全息干涉法的基础上,提出了一种新型的二元液体互扩散系数测量方法.由于该方法直接利用探测光相位求取互扩散系数,因此可有效避免外界噪声信号对实验结果的影响,从而降低了数字全息干涉法对外界光学环境的要求.该方法的互扩散系数测量相对合成不确定度为0.7%.测量了25℃下、0.33 mol/L KCl水溶液的互扩散系数,实验结果与文献值符合良好,验证了该测量方法的可行性.利用该方法,测量了甲醇/环己烷二元系在其不互溶区附近的互扩散系数,揭示了其在该区域的变化规律.依据实验数据,预测了该二元系的热力学亚稳定和非稳定区域的分界线——Spinodal曲线.

Keyword :

扩散 全息干涉 溶液 测量 二元混合物

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GB/T 7714 张颖 , 张诗 , 何茂刚 . 数字全息干涉法测量二元溶液互扩散系数 [J]. | 化工学报 , 2018 , (9) : 3774-3782 .
MLA 张颖 et al. "数字全息干涉法测量二元溶液互扩散系数" . | 化工学报 9 (2018) : 3774-3782 .
APA 张颖 , 张诗 , 何茂刚 . 数字全息干涉法测量二元溶液互扩散系数 . | 化工学报 , 2018 , (9) , 3774-3782 .
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O2在庚酸乙酯中的溶解度 CSCD PKU
期刊论文 | 2018 , (1) , 68-72 | 热科学与技术
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利用等体积饱和法气体溶解度实验系统首次测量了温度为293.00~333.00 K、压力为0.70~4.00 MPa内O2在庚酸乙酯中的溶解度数据,溶解度的相对扩展不确定度小于4%.实验结果表明:O2在庚酸乙酯中的溶解度随着压力升高而增大,随温度升高而减小.利用NRTL方程对溶解度实验数据进行了关联,计算结果与实验数据之间的平均绝对偏差为1.6%.

Keyword :

溶解度 NRTL方程 等体积饱和法 庚酸乙酯

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GB/T 7714 刘思琦 , 白里航 , 刘向阳 et al. O2在庚酸乙酯中的溶解度 [J]. | 热科学与技术 , 2018 , (1) : 68-72 .
MLA 刘思琦 et al. "O2在庚酸乙酯中的溶解度" . | 热科学与技术 1 (2018) : 68-72 .
APA 刘思琦 , 白里航 , 刘向阳 , 赖添旺 , 何茂刚 . O2在庚酸乙酯中的溶解度 . | 热科学与技术 , 2018 , (1) , 68-72 .
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A Viscosity Model of Liquid Based on Absolute Rate Theory at High Pressures EI
期刊论文 | 2018 , 39 (7) , 1407-1411 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

In this work, a viscosity model for liquid at high pressure modified from Macías-Salinas's model was presented, in which the pressure influence on vacancy formation energy was considered and a reference state was introduced. Compared with other model, the enthalpy of vaporization and the compressibility factor at saturated condition are eliminated in the new model, which improves the accuracy and leads to a simpler form. The model was tested by using the experimental viscosity data of 15 liquids at temperatures from 90 K to 440 K and pressures up to 251.3 MPa. The overall average absolute relative deviation of the present model was estimated to be lower than 2%, and the absolute maximum deviation was lower than 9.4%, which verified the precision of the present model. © 2018, Science Press. All right reserved.

Keyword :

Average absolute relative deviations Compressibility factor Enthalpy of vaporization Equation of state Rate theory Saturated conditions Vacancy formation energies Viscosity modeling

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GB/T 7714 Zhu, Chen-Yang , Liu, Xiang-Yang , He, Mao-Gang . A Viscosity Model of Liquid Based on Absolute Rate Theory at High Pressures [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (7) : 1407-1411 .
MLA Zhu, Chen-Yang et al. "A Viscosity Model of Liquid Based on Absolute Rate Theory at High Pressures" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 39 . 7 (2018) : 1407-1411 .
APA Zhu, Chen-Yang , Liu, Xiang-Yang , He, Mao-Gang . A Viscosity Model of Liquid Based on Absolute Rate Theory at High Pressures . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (7) , 1407-1411 .
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Improvement of dynamic light scattering method for measurement of particle diameter and liquid viscosity EI SCIE CSCD PKU
期刊论文 | 2018 , 67 (16) | ACTA PHYSICA SINICA
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Dynamic light scattering (DLS) technology has been employed to measure the hydrodynamic diameter of particle and liquid viscosity by detecting the translational diffusion coefficient of Brownian particle in the suspending liquid. The interaction between the particles in the suspension may lead to unpredictable deviations when the Stokes-Einstein equation is applied directly in the measurement. In order to solve this problem, this paper deduced the Stokes-Einstein's equation and introduced the One-Parameter Models to modify the existing DLS measurement principle. Based on the One-Parameter Models, the linear relation of collective translational diffusion coefficient with the single-particle translational diffusion coefficient and particles concentration was established and verified by the measurement under low particle concentration, which was introduced in the DLS principle. The improved method was able to obtain the single-particle translational diffusion coefficient, then the problem caused by the change of particle size in the suspension was solved. Compared with previous methods, the improved method can be used to measure the nominal diameter of nanoscale spherical particles and absolutely detect liquid viscosity. The fundamental principle of detection by light scattering was explained and a DLS experimental system was established for the measurement of viscosity and particle size. The two dispersed systems of polystyrene particles + water and silica particles + alcohol were considered as the samples for reference and measured to verify the reasonability of the improved method presented in this work. In addition, the influence of temperature and particles concentration on the collective translational diffusion coefficient was detected for this two dispersed systems. The interaction between the particles in the suspension was analyzed based on the experimental results. In a two-component system composed of rigid particles and liquid, three types of force act on a particle, which included the "Brownian" force, the direct interactions between the particles and the hydrodynamic interactions. The combined effects of the three forces can be qualitatively described as attractive or repulsive. The collective translational diffusion coefficient of the particles in the suspension increases with the increase of the particle volume concentration, indicating that the force between the particles in the suspension is repulsive, and vice versa. In addition, it was confirmed that in the ideal thin suspension, the Brownian motion of the particles increases with the temperature increases. The experimental results indicated the attractive forces among the polystyrene particles in water and the repulsive force among the silica particles in alcohol. The relationship between the second osmotic virial coefficient and the law of particles' collective translational diffusion coefficient with particles concentration is discussed.

Keyword :

translational diffusion coefficient viscosity particle diameter dynamic light scattering

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GB/T 7714 Zhang Ying , Zheng Yu , He Mao-Gang . Improvement of dynamic light scattering method for measurement of particle diameter and liquid viscosity [J]. | ACTA PHYSICA SINICA , 2018 , 67 (16) .
MLA Zhang Ying et al. "Improvement of dynamic light scattering method for measurement of particle diameter and liquid viscosity" . | ACTA PHYSICA SINICA 67 . 16 (2018) .
APA Zhang Ying , Zheng Yu , He Mao-Gang . Improvement of dynamic light scattering method for measurement of particle diameter and liquid viscosity . | ACTA PHYSICA SINICA , 2018 , 67 (16) .
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