2 edition of Computer evaluation of binary vapor-liquid equilibrium data found in the catalog.
Computer evaluation of binary vapor-liquid equilibrium data
John Warren Macan
Written in English
|Statement||by John Warren Macan.|
|The Physical Object|
|Pagination||55 leaves, bound :|
|Number of Pages||55|
Full text of "Liquid-vapor equilibrium in the binary systems of > I * NBS TECHNICAL NOTE Liquid-Vapor Equilibrium in the Binary Systems of He 4 and He 3 with nD 2 and nH 2 NATIONAL BUREAU OF STANDARDS The National Bureau of Standards 1 was established by an act of Congress March 3, 45 C. A. Eckert and J. M. Prausnitz, On. This paper presents a method of predicting vapor‐liquid equilibria of binary systems at reduced or higher pressures if vapor‐liquid equilibria of the systems concerned are available at atmospheric pressure. The method is based upon Prahl's three‐constant equation which expresses vapor‐liquid composition relationships directly.
Evaluation of Binary PTxyVapor-liquid Equilibrium Data for Co Hydrocarbons.. Benzene + Cyclohexane Buford D. Smith, 01 Muthu, Ashok Dewan, and Matthew Gieriach Thermodynamics Research Laboratory, Box , Washington University, St. Louis, Missouri The methods used to evaluate subcritical binary PTxy vapor~liquid equilibrium data are. Vapor liquid equilibrium data for the two binary systems, acetic acid - water and formic acid - water, are computed. Gas phase dimerizations of the two carboxylic acids are taken into account. The formic acid – water mixture presents a maximum boiling azeotrope. Computations done in the present notebook are compared to experimental data.
The Txy graph below shows binary mixtures of n-pentane and n-heptane at a fixed pressure of atm. Like all phase diagrams, areas outside of enclosed regions represent a single phase, and areas enclosed by coexistence lines represent two phases in equilibrium, with the boundary lines representing the two phases that are in equilibrium. Computer aided data book of vapor-liquid equilibria. Mitsuho Hirata, Shuzo Ohe, Kunio Nagahama. Kodansha Limited, - Science - pages. 0 Reviews. Science / Chemistry / Computational & Molecular Modeling Science / Chemistry / General Tables Vapor-liquid equilibrium: Export Citation.
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Computer evaluation of binary vapor-liquid equilibrium dataAuthor: John Warren Macan. Knowledge of vapour-liquid equilibrium (VLE) data is necessary for the proper understanding of a large number of industrial and laboratory processes.
Such data allow a grasp of the thermodynamic behaviour of mixtures, the study of intermolecular interactions and enable insight into the molecular nature of by: 4.
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Vapor – Liquid Equilibrium (VLE) diagrams of binary components. References: Perry’s Chemical Engineering Handbook, McGraw-Hill, Computer Aided Data Book of Vapor-Liquid Equilibria by Mitsuho Hirata, Shuzo Ohe and Kunio Nagahama. Introductory Chemical Engineering Thermodynamics by J.
Elliott and Carl T. Lira, Prentice Hall Int. Vapor−liquid equilibrium data in the three binary 2-methylpentane + 3-methylbutanone, 2-methylpentane + 3-methylbutanol, and 3-methylbutanone + 3-methylbutanol systems and in the ternary 2-methylpentane + 3-methylbutanone + 3-methylbutanol system are by: The thermodynamic consistency of binary vapor–liquid equilibrium data has been examined for 46 binary alcohol + hydrocarbon systems with data sets in total ( isobaric and isothermal sets) using the PAI test proposed in our previous study.
probably the largest collection of vapor-liquid equilibrium data that is today available with evaluation programs and experimental data - for direct re trieval by means of computers. This is also part of the DECHEMA Data Service and can be used by subscribers.
We present the evaluation of this material in several parts of the first volume. Introduction to vapor/liquid equilibrium Phase equilibrium, and in particular vapor/liquid-equilibrium (VLE), is important for many process engineering applications.
The thermodynamic basis for phase equilibrium is the same as for chemical equilibrium, namely that the Gibbs energy G is minimized at a given T and p (see page ). Vapor-Liquid Equilibrium Data Collection Sa Halogen, Nitrogen, Sulfur and other Compounds Supplement 1 Tables and diagrams of data for binary and multicomponent mixtures up to moderate pressures.
Constants of correlation equations for computer use. Gmehling, U. Onken Technische Chemie Universitat Oldenburg. the data either from a file or from the comments section. For both methods you must click the "file open" icon next to data. In our case we must click Yes when asked to Load data from comments field.
This loads the information from the comments page onto the data line (all in one line) – as shown below: pxy; T=25C, p=, x=0, y=0. The isobaric vapor–liquid equilibrium measurements for the systems of 2-butyl acetate with three chemicals (methanol, 2-butyl alcohol, methyl acetate) were determined respectively in a modified Rose still at kPa.
Thermodynamic consistency of the three binary vapor–liquid equilibrium data had been confirmed by Herington methods. The three groups of experimental data. The aim of this work is to evaluate the thermodynamic consistency (TC) of binary vapor–liquid equilibrium (VLE) data at low pressure using the PAI test proposed in our previous study.
In this work, the PAI test was incorporated with the NRTL equation for fitting by: Isobaric vapor−liquid equilibria were measured for the four binary systems of perfluoromethylpentane (FCmmyc2) + perfluorooctane (FCmc6), 1,1,1,2,2,3,3,4,4-nonafluorohexane (HFCmccf) + octane, 2,2,2-trifluorodiethyl ether (HFEmf-f) + butyl ethyl ether, and methylperfluoroisopropyl ether (HFE mmy) + heptane at atmospheric pressure.
The HFEmf-f. Determination and correlation of binary vapor-liquid equilibrium data. Fluid Phase Equilibria, 1: 18 The Chao modification of the Redlich-Kister equation for correlating liquid activity coefficients is further modified to facilitate the evaluation of the constants.
Vapor-Liquid Equilibrium. Presentation of the vapor-liquid equilibrium data in the form of pressure-composition, temperature-composition, and x - y diagrams are presented.
Bubble and dew point pressure, bubble and dew point temperature, and flash calculations are carried out. Vapor-Liquid Equilibrium Data Collection Sa Carboxylic Acids, Anhydrides Supplement 1 Tables and diagrams of data for binary and multicomponent mixtures up to moderate pressures.
Constants of correlation equations for computer use. Gmehling, U. The book also tackles the methods for the direct determination of equilibrium data (distillation, circulation, static, dew and bubble point, and flow methods).
The text concludes with a review of the literature on the systems whose vapor-liquid equilibrium data had been measured and reported to the beginning of The recommended vapor–liquid equilibrium (VLE) data for 39 binary n-alcohol–n-alkane systems have been obtained after critical evaluation of all data ( data sets) reported in the open literature up to the middle of The evaluation procedure consisted in combining the thermodynamic consistency tests, data correlation, comparison with enthalpy of mixing data, and comparison of VLE.
A quality assessment algorithm for vapor−liquid equilibrium (VLE) data has been developed. The proposed algorithm combines four widely used tests of VLE consistency based on the requirements of the Gibbs−Duhem equation, with a check of consistency between the VLE binary data and the pure compound vapor pressures.
A VLE data-quality criterion is proposed based on the developed. Numerical values of the NRTL equation parameters for calculation of the vapor–liquid–liquid equilibria (VLLE) at atmospheric pressures for 27 ternary mixtures are presented. These values were fitted to the experimental VLLE and vapor–liquid equilibrium (VLE) data to describe simultaneously, as accurately as possible, VLE and liquid–liquid equilibria (LLE).
The experimental liquid-liquid equilibrium data show that the use of an electrolyte system for recovering citric acid is feasible. On the other hand, the simulation results using NaCl show that it is qualitatively possible to have high recovery of citric acid exploring the salting-out effect, but high solvent flow rate was necessary.A new method to reduce vapor‐liquid equilibrium data of binary mixtures and to evaluate a thermodynamic model is presented.
It is based on the principle of maximum likelihood. Deviations between all measured and predicted quantities are calculated and confidence limits in model parameters are evaluated from the given estimates of experimental.New consistent vapor−liquid equilibrium data for the binary systems 3-methylpentane + ethyl 1,1-dimethylethyl ether, + diisopropyl ether, and + tetrahydrofuran are reported at kPa.