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学者姓名:刘志刚

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Viscosity Model For Ionic Liquid Based on the Free-Volume Theory EI Scopus CSCD PKU
期刊论文 | 2018 , 39 (2) , 233-236 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

Because of the low melting point, low vapor pressure and high thermal stability, ionic liquid (IL) is considered as the green solvents and has been signicantly investigated during the past few years. In this work, a modied free-volume theory is proposed to establish a viscosity model that is used to obtain the values of 29 ILs in the temperate range of 273.15~373.15 K. Comparison the experimental data with the calculated values, the average absolute relative deviation (AARD) is less than 1.22%, the maximum deviation (MD) is less than 3.91%, indicating that the model is successful in correlating the viscosity of IL over wide ranges of temperature. © 2018, Science Press. All right reserved.

Keyword :

Average absolute relative deviations Calculated values Free-volume theory Green solvents High thermal stability Low melting point Low vapor pressures Viscosity modeling

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GB/T 7714 Yang, Fu-Xin , Wang, Xiao-Po , Ma, Qian et al. Viscosity Model For Ionic Liquid Based on the Free-Volume Theory [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (2) : 233-236 .
MLA Yang, Fu-Xin et al. "Viscosity Model For Ionic Liquid Based on the Free-Volume Theory" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 39 . 2 (2018) : 233-236 .
APA Yang, Fu-Xin , Wang, Xiao-Po , Ma, Qian , Liu, Zhi-Gang . Viscosity Model For Ionic Liquid Based on the Free-Volume Theory . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (2) , 233-236 .
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Experimental investigations on the thermophysical properties of methyl myristate in alcoholic solutions EI SCIE Scopus
期刊论文 | 2018 , 215 , 187-195 | FUEL
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

Due to the limitations of using biodiesel directly or blended with petroleum diesel, alcohols are always employed as the additives to improve the certain properties of biodiesel. In this work, experimental investigations are conducted on the thermophysical properties, especially the density and viscosity, of binary mixtures containing the component of the biodiesel, namely methyl myristate, with higher alcohols, including 1-propanol, 1-butanol and 1-pentanol at atmospheric pressure from 303.15 K to 333.15 K. The Vogel-Fulcher-Tammann equation is introduced to correlate the viscosity. The derived property of thermal expansion coefficient is calculated based on the experimental density. The excess properties are obtained to further understand the interactions between the ester and the alcohols. The positive value of the excess molar volume and negative value of viscosity deviation are observed, indicating that the increasing contribution of the repulsive forces between methyl ester and the alcohols.

Keyword :

1-Butanol Thermophysical property Methyl myristate 1-Pentanol 1-Propanol Thermal expansion coefficient

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GB/T 7714 Yang, Fuxin , Wang, Xiaopo , Tan, Houzhang et al. Experimental investigations on the thermophysical properties of methyl myristate in alcoholic solutions [J]. | FUEL , 2018 , 215 : 187-195 .
MLA Yang, Fuxin et al. "Experimental investigations on the thermophysical properties of methyl myristate in alcoholic solutions" . | FUEL 215 (2018) : 187-195 .
APA Yang, Fuxin , Wang, Xiaopo , Tan, Houzhang , He, Siyuan , Liu, Zhigang . Experimental investigations on the thermophysical properties of methyl myristate in alcoholic solutions . | FUEL , 2018 , 215 , 187-195 .
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Absorption of isobutane in three linear chained pentaerythritol esters between 293.15 and 348.15 K EI SCIE
期刊论文 | 2017 , 76 , 118-125 | INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | IF: 3.233
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Abstract :

Isobutane (R600a) is widely used in small capacity refrigeration equipment, especially domestic refrigerator. Knowledge of refrigerant absorption in lubricant oil is one of the essential factors for designing refrigeration system and choosing suitable oil. In this work, the liquid mole fractions of R600a in three linear chained pentaerythritol esters (pentaerythritol tetrabutyrate, pentaerythritol tetrahexanoate, and pentaerythritol tetraoctanoate) were measured from 293.15 K to 348.15 K by means of isochoric saturation method. The measured data were modeled using the PR EOS and HVOS mixing rule combined withWilson excess free-energy model. Average relative deviations between the calculated pressure from the model and measured results for R600a + pentaerythritol tetrabutyrate, R600a + pentaerythritol tetrahexanoate, and R600a + pentaerythritol tetraoctanoate systems were 0.74%, 0.90%, and 0.57%, respectively. Maximum relative deviations were 2.13%, 2.91%, and 2.13%, respectively. (C) 2017 Elsevier Ltd and IIR. All rights reserved.

Keyword :

Pentaerythritol esters Absorption Lubricant oil Isobutane

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GB/T 7714 Sun, Yanjun , Wang, Xiaopo , Wang, Dongbo et al. Absorption of isobutane in three linear chained pentaerythritol esters between 293.15 and 348.15 K [J]. | INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID , 2017 , 76 : 118-125 .
MLA Sun, Yanjun et al. "Absorption of isobutane in three linear chained pentaerythritol esters between 293.15 and 348.15 K" . | INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID 76 (2017) : 118-125 .
APA Sun, Yanjun , Wang, Xiaopo , Wang, Dongbo , Jin, Liwen , Liu, Zhigang . Absorption of isobutane in three linear chained pentaerythritol esters between 293.15 and 348.15 K . | INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID , 2017 , 76 , 118-125 .
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DETERMINATION OF THE POTENTIAL ENERGY SURFACES OF REFRIGERANT MIXTURES AND THEIR GAS TRANSPORT COEFFICIENTS SCIE Scopus
期刊论文 | 2017 , 21 (6) , 2851-2858 | THERMAL SCIENCE | IF: 1.431
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Abstract :

In this work, the inversion scheme was used to determine the potential energy surfaces of five polar refrigerant mixtures. The systems studied here are R123-R134a, R123-R142b, R123-R152a, R142b-R134a, and R142b-R152a. The low density transport coefficients of the refrigerant mixtures were calculated from the new invert potentials by the classical kinetic theory. The viscosity coefficient, binary diffusion coefficient, and thermal diffusion factor were computed for the temperature range from 313.15-973.15 K The agreement with the NIST viscosity data demonstrates that the present calculated values are accurate enough to supplement experimental data over an extended temperature range. Correlations of the transport properties were also provided for the refrigerant mixtures at equimolar ratios.

Keyword :

polar refrigerant mixture transport coefficient inversion method potential energy surface

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GB/T 7714 Song, Bo , Wang, Xiaopo , Liu, Zhigang . DETERMINATION OF THE POTENTIAL ENERGY SURFACES OF REFRIGERANT MIXTURES AND THEIR GAS TRANSPORT COEFFICIENTS [J]. | THERMAL SCIENCE , 2017 , 21 (6) : 2851-2858 .
MLA Song, Bo et al. "DETERMINATION OF THE POTENTIAL ENERGY SURFACES OF REFRIGERANT MIXTURES AND THEIR GAS TRANSPORT COEFFICIENTS" . | THERMAL SCIENCE 21 . 6 (2017) : 2851-2858 .
APA Song, Bo , Wang, Xiaopo , Liu, Zhigang . DETERMINATION OF THE POTENTIAL ENERGY SURFACES OF REFRIGERANT MIXTURES AND THEIR GAS TRANSPORT COEFFICIENTS . | THERMAL SCIENCE , 2017 , 21 (6) , 2851-2858 .
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Modified Vapor Pressure Model Based on Corresponding-States Principle for Pure and Mixed Refrigerants EI SCIE Scopus
期刊论文 | 2017 , 50 (11) , 807-814 | JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | IF: 0.635
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Abstract :

In this paper, a modified three-parameter Lee-Kesler-like corresponding states model is presented to calculate the vapor pressure of pure refrigerants and refrigerant mixtures by using two reference fluids (R13 and R227ea). A new scaling parameter is proposed in the model to substitute for the classical acentric factor. The modified model shows a good accuracy over a wide range of temperatures and especially in the low-temperature region when compared to other Lee-Kesler-like corresponding states models such as Lee-Kesler, Teja, and Estela-Uribe.

Keyword :

Refrigerant Corresponding State Scaling Factor Vapor Pressure

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GB/T 7714 Sun, Yanjun , Wang, Xiaopo , Jin, Liwen et al. Modified Vapor Pressure Model Based on Corresponding-States Principle for Pure and Mixed Refrigerants [J]. | JOURNAL OF CHEMICAL ENGINEERING OF JAPAN , 2017 , 50 (11) : 807-814 .
MLA Sun, Yanjun et al. "Modified Vapor Pressure Model Based on Corresponding-States Principle for Pure and Mixed Refrigerants" . | JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 50 . 11 (2017) : 807-814 .
APA Sun, Yanjun , Wang, Xiaopo , Jin, Liwen , Liu, Zhigang . Modified Vapor Pressure Model Based on Corresponding-States Principle for Pure and Mixed Refrigerants . | JOURNAL OF CHEMICAL ENGINEERING OF JAPAN , 2017 , 50 (11) , 807-814 .
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Effect of organic solvents on lowering the viscosity of 1-hexyl-3-methylimidazolium chloride EI SCIE Scopus
期刊论文 | 2017 , 113 , 358-368 | JOURNAL OF CHEMICAL THERMODYNAMICS | IF: 2.631
WoS CC Cited Count: 5 SCOPUS Cited Count: 5
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Abstract :

Ionic liquids have been widely explored in making biofuels from biomass. Ionic liquid generally has high viscosity that would impede the dissolution of biomass. One of the possible ways is to use the organic solvent to lower the viscosity. In this work, experimental studies on the densities and viscosities of binary mixtures are conducted at atmospheric pressure (0.0967 MPa) in the temperature range from 303.15 K to 353.15 K. The mixtures are comprised by ionic liquid of 1-hexyl-3-methylimidazolium chloride and organic solvents of N,N-dimethylacetamide, N,N-dimethylformamide, dimethyl sulfoxide and pyridine. The excess properties are calculated to evaluate the interactions of ionic liquid with organic solvents. The Vogel-Fulcher-Tammann equation along with ideal Grunberg-Nissan equation is introduced to correlate the viscosity values. The results are used to quantitatively analyze the effects of organic solvents on lowering the viscosities of ionic liquid. (C) 2017 Elsevier Ltd.

Keyword :

Organic solvent Viscosity 1-hexyl-3-methylimidazolium chloride Density

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GB/T 7714 Yang, Fuxin , Ma, Qian , Wang, Xiaopo et al. Effect of organic solvents on lowering the viscosity of 1-hexyl-3-methylimidazolium chloride [J]. | JOURNAL OF CHEMICAL THERMODYNAMICS , 2017 , 113 : 358-368 .
MLA Yang, Fuxin et al. "Effect of organic solvents on lowering the viscosity of 1-hexyl-3-methylimidazolium chloride" . | JOURNAL OF CHEMICAL THERMODYNAMICS 113 (2017) : 358-368 .
APA Yang, Fuxin , Ma, Qian , Wang, Xiaopo , Liu, Zhigang . Effect of organic solvents on lowering the viscosity of 1-hexyl-3-methylimidazolium chloride . | JOURNAL OF CHEMICAL THERMODYNAMICS , 2017 , 113 , 358-368 .
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Volumetric Properties of 1-Butyl-3-methylimidazolium Chloride with Organic Solvents EI SCIE Scopus
期刊论文 | 2017 , 62 (11) , 3958-3966 | JOURNAL OF CHEMICAL AND ENGINEERING DATA | IF: 2.196
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Abstract :

Ionic liquids are considered green solvents and widely investigated. 1-Butyl-3-methylimidazohum chloride shows promise for making biofuels from biomass. In this work, the experimental densities of the binary mixtures, comprising ionic liquids of 1-butyl-3-methylimidazolium chloride and organic solvents (i.e., N,N-dimethylacetamide, N,N-dimethyl-formamide, dimethyl sulfoxide, and pyridine), are determined at atmospheric pressure (0.0967 MPa) from 303.15-to 353.15 K. The excess molar volumes are determined to understand the interaction between ionic liquid and organic solvents, and a Redlich-Kister type equation is used to describe the excess properties. Moreover, the derived volumetric properties of thermal expansion coefficients are calculated as well as the excess coefficients.

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GB/T 7714 Yang, Fuxin , Wang, Dongbo , Wang, Xiaopo et al. Volumetric Properties of 1-Butyl-3-methylimidazolium Chloride with Organic Solvents [J]. | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2017 , 62 (11) : 3958-3966 .
MLA Yang, Fuxin et al. "Volumetric Properties of 1-Butyl-3-methylimidazolium Chloride with Organic Solvents" . | JOURNAL OF CHEMICAL AND ENGINEERING DATA 62 . 11 (2017) : 3958-3966 .
APA Yang, Fuxin , Wang, Dongbo , Wang, Xiaopo , Liu, Zhigang . Volumetric Properties of 1-Butyl-3-methylimidazolium Chloride with Organic Solvents . | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2017 , 62 (11) , 3958-3966 .
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Experimental Study on Differential Pressure Fluctuations Characteristics of Unsteady Flow Pattern in Pipeline-riser System EI Scopus CSCD PKU
期刊论文 | 2017 , 38 (6) , 1250-1256 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

Air-water two-phase flow in pipeline-risers was investigated in this paper, where the flow structure was divided into two major patterns of stable flow and unstable flow. A flow regime map within the wide range of flow velocity was built up. Experiments revealed the flow characteristics and formation mechanism of irregular flow regime. In pipeline-riser system, the gradual accumulating of liquid phase is the key factor for establishment of the unstable stage; while being unable to fill the liquid reduction caused by occasional cyclic eruptions during the low liquid velocity is the critical factor for establishment of the stable stage. Under moderate and high superficial velocities, with the increase of the superficial gas or liquid velocity, the fluctuation magnitude of differential pressures along the riser and along the horizontal pipe differential pressure first increases and then decreases, while under low superficial velocities, the fluctuation magnitude decreases monotonically. Meanwhile, the corresponding contour maps of differential pressure fluctuations were presented respectively. © 2017, Science Press. All right reserved.

Keyword :

Air-water two phase flows Critical factors Differential pressures Flow charac-teristics Formation mechanism Horizontal pipes Liquid velocities Superficial velocity

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GB/T 7714 Yao, Tian , Guo, Lie-Jin , Liu, Zhi-Gang et al. Experimental Study on Differential Pressure Fluctuations Characteristics of Unsteady Flow Pattern in Pipeline-riser System [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2017 , 38 (6) : 1250-1256 .
MLA Yao, Tian et al. "Experimental Study on Differential Pressure Fluctuations Characteristics of Unsteady Flow Pattern in Pipeline-riser System" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 38 . 6 (2017) : 1250-1256 .
APA Yao, Tian , Guo, Lie-Jin , Liu, Zhi-Gang , Wu, Quan-Hong . Experimental Study on Differential Pressure Fluctuations Characteristics of Unsteady Flow Pattern in Pipeline-riser System . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2017 , 38 (6) , 1250-1256 .
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Measurement of gas-liquid phase equilibrium for trans-1, 3, 3, 3-tetrafluoropropene and squalane EI CSCD PKU
期刊论文 | 2017 , 68 (8) , 2979-2984 | Huagong Xuebao/CIESC Journal
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Abstract :

The gas-liquid phase equilibrium experimental system based on the isochoric saturation method in the laboratory was improved. The visual equilibrium cell, thermostatic system and magnetic stirring system were modified. In order to check the reliability and accuracy of the new system, the phase equilibrium of carbon dioxide and pentaerythritol tetrahexanoate was measured at 303.15 K, the absolute average deviation was 0.95% and the maximum deviation was 2.01% compared with the reference data. The expanded uncertainties of temperature, pressure and mole fraction are 0.03 K, 2.0 kPa, and 3.0%, respectively. Phase equilibria behavior of trans-1, 3, 3, 3-tetrafluoropropene and squalane was determined at temperature range from 283.15 K to 348.15 K. The experimental data were correlated with Peng-Robinson equation of state and van der Waals mixing rule using two interaction parameters. The absolute average deviation between experimental data and calculated values for pressure was 0.88%, and the maximum deviation was 3.80%. In addition, the immiscibility phenomenon for trans-1, 3, 3, 3-tetrafluoropropene and squalane mixtures was found in the temperature range from 283.15 K to 333.15 K. © All Right Reserved.

Keyword :

Absolute average deviation Experimental system Interaction parameters Peng-Robinson equation of state Squalane Thermostatic systems Trans-1 , 3 , 3 , 3-tetrafluoropropene Van der waals mixing rule

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GB/T 7714 Sun, Yanjun , Wang, Xiaopo , Liu, Zhigang et al. Measurement of gas-liquid phase equilibrium for trans-1, 3, 3, 3-tetrafluoropropene and squalane [J]. | Huagong Xuebao/CIESC Journal , 2017 , 68 (8) : 2979-2984 .
MLA Sun, Yanjun et al. "Measurement of gas-liquid phase equilibrium for trans-1, 3, 3, 3-tetrafluoropropene and squalane" . | Huagong Xuebao/CIESC Journal 68 . 8 (2017) : 2979-2984 .
APA Sun, Yanjun , Wang, Xiaopo , Liu, Zhigang , Jin, Liwen . Measurement of gas-liquid phase equilibrium for trans-1, 3, 3, 3-tetrafluoropropene and squalane . | Huagong Xuebao/CIESC Journal , 2017 , 68 (8) , 2979-2984 .
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Influence of Aprotic Cosolvents on the Thermophysical Properties of Imidazolium-Based Ionic Liquid EI SCIE Scopus
期刊论文 | 2017 , 62 (5) , 1628-1638 | JOURNAL OF CHEMICAL AND ENGINEERING DATA | IF: 2.196
WoS CC Cited Count: 3 SCOPUS Cited Count: 4
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Abstract :

Imidazolium-based ionic liquids (ILs) have been widely investigated in the biofuels process. In this work, the experimental densities and viscosities of binary mixtures of IL, 1-octyl-3-methylimidazolium chloride, with aprotic cosolvents (i.e., N,N-dimethylacetamide, N,N-dimethylformamide, dimethyl sulfoxide, and pyridine) were studied at temperatures ranging from (303.15 to 353.15) K at atmospheric pressure. The Vogel-Fulcher-Tammann equation is used to correlate the viscosity data. Toward further understanding the influences of cosolvents on the properties of IL, the excess properties of density and viscosity deviations are calculated as well as the energy barrier. The effects of cosolvents on the density and viscosity are discussed.

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GB/T 7714 Yang, Fuxin , Ma, Qian , Wang, Xiaopo et al. Influence of Aprotic Cosolvents on the Thermophysical Properties of Imidazolium-Based Ionic Liquid [J]. | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2017 , 62 (5) : 1628-1638 .
MLA Yang, Fuxin et al. "Influence of Aprotic Cosolvents on the Thermophysical Properties of Imidazolium-Based Ionic Liquid" . | JOURNAL OF CHEMICAL AND ENGINEERING DATA 62 . 5 (2017) : 1628-1638 .
APA Yang, Fuxin , Ma, Qian , Wang, Xiaopo , Liu, Zhigang . Influence of Aprotic Cosolvents on the Thermophysical Properties of Imidazolium-Based Ionic Liquid . | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2017 , 62 (5) , 1628-1638 .
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