Interfacial Tension at the Boiling Point and Vapor Viscosity near the Dew Point of Binary Mixtures.

1958 ◽  
Vol 3 (1) ◽  
pp. 82-88 ◽  
Author(s):  
T. Ling ◽  
Matthew Van Winkle
Keyword(s):  
Interfacial Tension ◽  
Binary Mixtures ◽  
Boiling Point ◽  
Dew Point

Measurements and modeling of interfacial tension for (CO2 + n-alkyl benzene) binary mixtures

2019 ◽  
Vol 154 ◽  
pp. 104625 ◽  
Author(s):  
Nan Li ◽  
Chengwei Zhang ◽  
Qinglan Ma ◽  
Zhenfeng Sun ◽  
Yun Chen ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Binary Mixtures ◽  
Alkyl Benzene

Highly Efficient and Accurate Gas-Alkane Binary Mixture Interfacial Tension Equations for a Broad Range of Temperatures, Pressures, and Compositions

SPE Journal ◽  
2021 ◽  
pp. 1-19
Author(s):  
Yingnan Wang ◽  
Nadia Shardt ◽  
Janet A. W. Elliott ◽  
Zhehui Jin
Keyword(s):  
Experimental Data ◽  
Binary Mixture ◽  
Interfacial Tension ◽  
Binary Mixtures ◽  
Oil Recovery ◽  
Computational Cost ◽  
Petroleum Engineering ◽  
Pure Species ◽  
Highly Efficient ◽  
Wide Range

Summary Gas-alkane interfacial tension (IFT) is an important parameter in the enhanced oil recovery (EOR) process. Thus, it is imperative to obtain an accurate gas-alkane mixture IFT for both chemical and petroleum engineering applications. Various empirical correlations have been developed in the past several decades. Although these models are often easy to implement, their accuracy is inconsistent over a wide range of temperatures, pressures, and compositions. Although statistical mechanics-based models and molecular simulations can accurately predict gas-alkane IFT, they usually come with an extensive computational cost. The Shardt-Elliott (SE) model is a highly accurate IFT model that for subcritical fluids is analytic in terms of temperature T and composition x. In applications, it is desirable to obtain IFT in terms of temperature T and pressure P, which requires time-consuming flash calculations, and for mixtures that contain a gas component greater than its pure species critical point, additional critical composition calculations are required. In this work, the SE model is combined with a machine learning (ML) approach to obtain highly efficient and highly accurate gas-alkane binary mixture IFT equations directly in terms of temperature, pressure, and alkane molar weights. The SE model is used to build an IFT database (more than 36,000 points) for ML training to obtain IFT equations. The ML-based IFT equations are evaluated in comparison with the available experimental data (888 points) and with the SE model, as well as with the less accurate parachor model. Overall, the ML-based IFT equations show excellent agreement with experimental data for gas-alkane binary mixtures over a wide range of T and P, and they outperform the widely used parachor model. The developed highly efficient and highly accurate IFT functions can serve as a basis for modeling gas-alkane binary mixtures for a broad range of T, P, and x.

Theoretical investigation of a combined Kalina and vapour-absorption cycle

2015 ◽  
Vol 26 (1) ◽  
pp. 113-124
Author(s):  
Mohammad Tariq ◽  
Vinod Kumar Nema
Keyword(s):  
Boiling Point ◽  
Saturation Temperature ◽  
Dew Point ◽  
Working Fluid ◽  
Absolute Pressure ◽  
Water Mixture ◽  
Cooling Cycle ◽  
Point Temperature ◽  
Mixture Concentration ◽  
Vapour Mixture

A program has been developed to calculate enthalpies at the salient points (later referred to as stations) of a combined power and cooling cycle provided pressure, temperature, mixture concentration and condition are known at these points. The ammonia-water mixture, which is taken as the working fluid, may be at one of the following seven conditions namely, superheated vapour mixture, mixture of superheated component of ammonia and pseudo vapour component of water, saturated vapour mixture, wet vapour mixture, saturated liquid mixture, mixture of subcooled water and pseudo liquid ammonia and subcooled mixture of subcooled components of ammonia and water. The mixture boiling-point temperature and dew-point temperature, needed to establish the condition of the working fluid, are functions of absolute pressure, critical pressure and critical temperature of the mixture; later two depend on the mixture concentration and the corresponding critical values of water at the given station. Using typical values of the variables as listed above, enthalpies at all stations are predicted. The predicted enthalpies are close (within 3%) to those available in the literature except at two stations where the mixture was weak in ammonia and its temperature was either in the near vicinity of the mixture boiling-point temperature or below the saturation temperature of pure ammonia at the concerned pressure. Using the predicted values of enthalpies, thermal efficiency of the combined power and cooling cycle has been calculated.

Interfacial Tension Measurement and Calculation of (Carbon Dioxide + n-Alkane) Binary Mixtures

2017 ◽  
Vol 62 (9) ◽  
pp. 2861-2871 ◽  
Author(s):  
Nan Li ◽  
Cheng-Wei Zhang ◽  
Qing-Lan Ma ◽  
Li-Yu Jiang ◽  
Yu-Xi Xu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Interfacial Tension ◽  
Binary Mixtures

scholarly journals Determination of interfacial tension of binary mixtures from perturbative approaches

2015 ◽  
Vol 113 (9-10) ◽  
pp. 1217-1227 ◽  
Author(s):  
F.J. Martínez-Ruiz ◽  
F.J. Blas
Keyword(s):  
Interfacial Tension ◽  
Binary Mixtures

scholarly journals The Mixtures of 2.4-Dinitrophenylhidrazones of Inferior Carbonyl Compounds and their HPLC Separation with Gradient Binary Mixtures Phases

2008 ◽  
Vol 3 (1) ◽  
pp. 52-55
Author(s):  
Gheorghe Zgherea
Keyword(s):  
Liquid Chromatography ◽  
Acid Solution ◽  
Organic Compounds ◽  
Binary Mixtures ◽  
Organic Solvents ◽  
Boiling Point ◽  
Carbonyl Compounds ◽  
Hplc Separation ◽  
Reverse Phase ◽  
Theoretical Considerations

Mixtures of small quantities of carbonyl compounds are presents in foods, concerning sensorial qualities. The inferior carbonyl compounds (C2-C4, boiling point <100°C) – mono and dicarbonyl – can be identified and measured their concentrations, after a separation by distillation on the water bath. They are transferred in a strongly acid solution of 2.4-dinitrophenylhidrazine (2.4-DNPH), generating a mixture of insoluble 2.4-dinitrophenylhidrazones (2.4-DNPH-ones). The 2.4-DNPH-ones are organic compounds with weak polarity, solids, crystallized, yellows and water insoluble, soluble in organic solvents. The mixture of 2.4dinitrophenylhidrazones may be separated by liquid chromatography, using the reverse phase mechanism [1-3]. This paper contains experimental and theoretical considerations to the means of separation through liquid chromatography of two synthetically and a natural mixtures that contain 2.4-DNPH-ones provided by inferior carbonyl compounds; to obtain conclude results, in the synthetically mixtures was introduce and 2.4-DNPH-ones provided by carbonyl compounds having three (acetone and propanal) and four (isobutyl aldehyde) atoms of carbon.

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