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学者姓名:刘志刚

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< Page ,Total 24 >
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
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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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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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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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Ab Initio Values of the Gas Transport Properties of Hydrogen Isotopologues and Helium-Hydrogen Mixtures at Low Density EI SCIE Scopus
期刊论文 | 2016 , 61 (5) , 1910-1916 | JOURNAL OF CHEMICAL AND ENGINEERING DATA | IF: 2.323
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Abstract :

We employed the classical kinetic theory to calculate transport properties as a function of temperature for hydrogen isotopologues and helium-hydrogen mixtures. The viscosity, thermal conductivity, diffusion coefficient, and thermal diffusion factor were computed at low density and over a wide temperature range from 298 to 2000 K. The calculation utilized the spherically symmetric versions of the latest ab initio potentials for the interactions of the like and unlike gas molecules. The computed values are generally consistent with the limited experimental data for HD, He-4-H-2, He-4-D-2, He-4-HD, He-3-H-2, He-3-D-2, H-2-HD, and D-2-HD. Our results provide reliable transport property data for the considered species at temperatures where experimental information is absent.

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GB/T 7714 Song, Bo , Kang, Kai , Zhang, Zhuo et al. Ab Initio Values of the Gas Transport Properties of Hydrogen Isotopologues and Helium-Hydrogen Mixtures at Low Density [J]. | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2016 , 61 (5) : 1910-1916 .
MLA Song, Bo et al. "Ab Initio Values of the Gas Transport Properties of Hydrogen Isotopologues and Helium-Hydrogen Mixtures at Low Density" . | JOURNAL OF CHEMICAL AND ENGINEERING DATA 61 . 5 (2016) : 1910-1916 .
APA Song, Bo , Kang, Kai , Zhang, Zhuo , Wang, Xiaopo , Liu, Zhigang . Ab Initio Values of the Gas Transport Properties of Hydrogen Isotopologues and Helium-Hydrogen Mixtures at Low Density . | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2016 , 61 (5) , 1910-1916 .
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Phase Equilibrium Behavior for Methoxymethane plus Pentaerythritol Tetraheptanoate and Methoxymethane plus Pentaerythritol Tetranonanoate Systems EI SCIE Scopus
期刊论文 | 2016 , 61 (10) , 3504-3509 | JOURNAL OF CHEMICAL AND ENGINEERING DATA | IF: 2.323
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Abstract :

Methoxymethane (called dimethyl ether, DME) is recognized as a promising alternative refrigerant. Knowledge of the phase equilibrium behavior of DME-lubricant is essential for selecting a suitable oil. A long-term systematic research program on the phase equilibrium for systems of DME and oils was carried out in our laboratory, making the effort to determine its dependence on the molecular structure of oils, temperature, and pressure. In this article, phase equilibrium data of the DME + pentaerythritol tetraheptanoate system and the DME + pentaerythritol tetranonanoate system were reported from (293.15 to 353.15) K using the isochoric saturation method. Experimental data of phase equilibrium were modeled by the Peng-Robinson (PR) equation of state using the HVOS mixing rule and the NRTL excess-free-energy model. Moreover, the influence of the molecular weight of pentaerythritol esters on the phase equilibrium behavior of DME/ester mixtures was analyzed.

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GB/T 7714 Sun, Yanjun , Wang, Xiaopo , Lang, Hanxiao et al. Phase Equilibrium Behavior for Methoxymethane plus Pentaerythritol Tetraheptanoate and Methoxymethane plus Pentaerythritol Tetranonanoate Systems [J]. | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2016 , 61 (10) : 3504-3509 .
MLA Sun, Yanjun et al. "Phase Equilibrium Behavior for Methoxymethane plus Pentaerythritol Tetraheptanoate and Methoxymethane plus Pentaerythritol Tetranonanoate Systems" . | JOURNAL OF CHEMICAL AND ENGINEERING DATA 61 . 10 (2016) : 3504-3509 .
APA Sun, Yanjun , Wang, Xiaopo , Lang, Hanxiao , Jin, Liwen , Liu, Zhigang . Phase Equilibrium Behavior for Methoxymethane plus Pentaerythritol Tetraheptanoate and Methoxymethane plus Pentaerythritol Tetranonanoate Systems . | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2016 , 61 (10) , 3504-3509 .
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Recommended gas transport properties of argon at low density using ab initio potential EI SCIE Scopus
期刊论文 | 2016 , 42 (1) , 9-13 | MOLECULAR SIMULATION | IF: 1.254
WoS CC Cited Count: 5
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Abstract :

The most important transport properties of argon have been calculated using classical kinetic theory expressions in conjunction with high-quality ab initio potential energy values computed by Patkowski and Szalewicz. Dilute gas transport properties have been calculated for the viscosity, thermal conductivity, self-diffusion coefficient and thermal diffusion factor from 83 to 10,000K. Comparisons between experimental transport property data and values presently calculated indicate that the present theoretical predictions may be employed as recommended values for this set of transport properties over a wide temperature range.

Keyword :

argon ab initio potential transport properties kinetic theory

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GB/T 7714 Song, Bo , Wang, Xiaopo , Liu, Zhigang . Recommended gas transport properties of argon at low density using ab initio potential [J]. | MOLECULAR SIMULATION , 2016 , 42 (1) : 9-13 .
MLA Song, Bo et al. "Recommended gas transport properties of argon at low density using ab initio potential" . | MOLECULAR SIMULATION 42 . 1 (2016) : 9-13 .
APA Song, Bo , Wang, Xiaopo , Liu, Zhigang . Recommended gas transport properties of argon at low density using ab initio potential . | MOLECULAR SIMULATION , 2016 , 42 (1) , 9-13 .
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Densities and surface tensions of binary mixtures of biodiesel, diesel, and n-butanol SCIE Scopus
期刊论文 | 2016 , 33 (5) , 1692-1697 | KOREAN JOURNAL OF CHEMICAL ENGINEERING | IF: 2.007
WoS CC Cited Count: 2
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Abstract :

Density and surface tension have been measured for mixtures of biodiesel+n-butanol, biodiesel+diesel, and diesel+n-butanol over the entire concentration range at 283.15 K and 293.15 K and atmospheric pressure, with the combined expanded uncertainties of 1.32 kg center dot m(-3) and 1%, receptively. Densities were determined by a single-sinker densimeter; surface tensions were measured using the surface laser light scattering method. The experimental data showed that densities and surface tensions decreased as temperature increased. The excess surface tensions and excess densities were all negative, and further fitted to the Redlich-Kister equation.

Keyword :

Surface Laser Light Scattering Method Biodiesel Surface Tension Diesel n-Butanol

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GB/T 7714 Yue, Hongya , Liu, Zhigang . Densities and surface tensions of binary mixtures of biodiesel, diesel, and n-butanol [J]. | KOREAN JOURNAL OF CHEMICAL ENGINEERING , 2016 , 33 (5) : 1692-1697 .
MLA Yue, Hongya et al. "Densities and surface tensions of binary mixtures of biodiesel, diesel, and n-butanol" . | KOREAN JOURNAL OF CHEMICAL ENGINEERING 33 . 5 (2016) : 1692-1697 .
APA Yue, Hongya , Liu, Zhigang . Densities and surface tensions of binary mixtures of biodiesel, diesel, and n-butanol . | KOREAN JOURNAL OF CHEMICAL ENGINEERING , 2016 , 33 (5) , 1692-1697 .
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Surface Tension of Binary Mixtures of 2,2,4-Trimethylpentane+1-Alkanols from 298.15 to 323.15 K EI SCIE Scopus
期刊论文 | 2016 , 61 (3) , 1270-1279 | JOURNAL OF CHEMICAL AND ENGINEERING DATA | IF: 2.323
WoS CC Cited Count: 6 SCOPUS Cited Count: 5
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Abstract :

Surface tension of binary systems of 2,2,4- trimethylpentane with 1-alkanols (ethanol, 1-propanol, 1-pentanol, 1-hexanol, or 1-heptanol) were measured at several different temperature and atmospheric pressure over the whole range of composition using the surface laser light scattering method, and the combined expanded uncertainties are less than 1%. The excess surface tensions, sigma(E), for these binary mixtures are calculated and fitted to the Redlich-Kister type equation, and the regression parameters and the standard deviations of the fitting are given. All of the sigma(E) values are negative over the whole composition range for these systems and decrease with the temperature increasing. Surface tensions were also used to estimate surface entropy, S-sigma, and surface enthalpy, H-sigma. These results may be useful for the development of the hydrocarbon fuels.

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GB/T 7714 Yue, Hongya , Liu, Zhigang . Surface Tension of Binary Mixtures of 2,2,4-Trimethylpentane+1-Alkanols from 298.15 to 323.15 K [J]. | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2016 , 61 (3) : 1270-1279 .
MLA Yue, Hongya et al. "Surface Tension of Binary Mixtures of 2,2,4-Trimethylpentane+1-Alkanols from 298.15 to 323.15 K" . | JOURNAL OF CHEMICAL AND ENGINEERING DATA 61 . 3 (2016) : 1270-1279 .
APA Yue, Hongya , Liu, Zhigang . Surface Tension of Binary Mixtures of 2,2,4-Trimethylpentane+1-Alkanols from 298.15 to 323.15 K . | JOURNAL OF CHEMICAL AND ENGINEERING DATA , 2016 , 61 (3) , 1270-1279 .
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Solubility of dimethyl ether in pentaerythritol tetrabutyrate and in pentaerythritol tetrapentanoate. Comparison with other pentaerythritol tetraalkyl esters EI SCIE Scopus
期刊论文 | 2015 , 87 , 23-28 | JOURNAL OF CHEMICAL THERMODYNAMICS | IF: 2.196
WoS CC Cited Count: 4
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Abstract :

The solubilities of dimethyl ether (DME) in pentaerythritol tetrabutyrate (PEC4) and in pentaerythritol tetrapentanoate (PEC5) between T = (283.15 and 353.15) K have been measured by isochoric saturation method. The experimental solubility data were correlated by the Peng-Robinson equation of state with HVOS mixing rule in which the excess Gibbs free energy at infinite pressure was represented by the NRTL equation. In addition, an analysis of the influence of the molar mass on the solubility of DME in PECs over a wide range of temperature and pressure was performed. (C) 2015 Elsevier Ltd. All rights reserved.

Keyword :

Pentaerythritol tetrapentanoate Dimethyl ether Solubility Pentaerythritol tetrabutyrate

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GB/T 7714 Sun, Yanjun , Wang, Xiaopo , Gong, Na et al. Solubility of dimethyl ether in pentaerythritol tetrabutyrate and in pentaerythritol tetrapentanoate. Comparison with other pentaerythritol tetraalkyl esters [J]. | JOURNAL OF CHEMICAL THERMODYNAMICS , 2015 , 87 : 23-28 .
MLA Sun, Yanjun et al. "Solubility of dimethyl ether in pentaerythritol tetrabutyrate and in pentaerythritol tetrapentanoate. Comparison with other pentaerythritol tetraalkyl esters" . | JOURNAL OF CHEMICAL THERMODYNAMICS 87 (2015) : 23-28 .
APA Sun, Yanjun , Wang, Xiaopo , Gong, Na , Liu, Zhigang . Solubility of dimethyl ether in pentaerythritol tetrabutyrate and in pentaerythritol tetrapentanoate. Comparison with other pentaerythritol tetraalkyl esters . | JOURNAL OF CHEMICAL THERMODYNAMICS , 2015 , 87 , 23-28 .
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Nitric-acid hydrolysis of Miscanthus giganteus to sugars fermented to bioethanol EI SCIE Scopus
期刊论文 | 2015 , 20 (2) , 304-314 | BIOTECHNOLOGY AND BIOPROCESS ENGINEERING | IF: 1.211
WoS CC Cited Count: 4
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Abstract :

Miscanthus giganteus (M. giganteus) is a promising feedstock for the production of bioethanol or biochemicals. Using only dilute nitric acid, this work describes a two-step process for hydrolyzing hemicellulose and cellulose to fermentable sugars. Primary variables were temperature and reaction time. The solid-to-liquid mass ratio was 1:8. No enzymes were used. In the first step, M. giganteus was contacted with 0.5 wt.% nitric acid at temperatures between 120 and 160A degrees C for 5 to 40 min. The second step used 0.5 or 0.75 wt.% nitric acid at temperatures between 180 and 210A degrees C for less than 6 min. Under selected conditions, almost all hemicellulose and 58% cellulose were transferred to the liquid phase. Small amounts of degradation products were observed. The xylose solution obtained from the nitric-acid hydrolysis was fermented for 96 h and the glucose solution for 48 h to yield 0.41 g ethanol/g xylose and 0.46 g ethanol/g glucose. To characterize residual solids and the liquor from both steps, nuclear-magneticresonance (NMR) spectroscopy was performed for each fraction. The analytical data indicate that the liquid phase from Steps 1 and 2 contain little lignin or lignin derivatives.

Keyword :

fermentation Miscanthus giganteus analysis with NMR dilute-nitric-acid hydrolysis two-step process

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GB/T 7714 Yang, Fuxin , Afzal, Waheed , Cheng, Kun et al. Nitric-acid hydrolysis of Miscanthus giganteus to sugars fermented to bioethanol [J]. | BIOTECHNOLOGY AND BIOPROCESS ENGINEERING , 2015 , 20 (2) : 304-314 .
MLA Yang, Fuxin et al. "Nitric-acid hydrolysis of Miscanthus giganteus to sugars fermented to bioethanol" . | BIOTECHNOLOGY AND BIOPROCESS ENGINEERING 20 . 2 (2015) : 304-314 .
APA Yang, Fuxin , Afzal, Waheed , Cheng, Kun , Liu, Nian , Pauly, Markus , Bell, Alexis T. et al. Nitric-acid hydrolysis of Miscanthus giganteus to sugars fermented to bioethanol . | BIOTECHNOLOGY AND BIOPROCESS ENGINEERING , 2015 , 20 (2) , 304-314 .
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