Correlation of Vapor−Liquid Equilibrium Data for Methyl Acetate−Methanol−Water−Acetic Acid Mixtures

and, Z. P. Xu; Chuang, Karl T.

doi:10.1021/ie9701175

Cited by 18 publications

(20 citation statements)

References 6 publications

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“…Fig. 3 shows the selectivity of the PERVAP 1060 membrane in contact with water-MeAc binary mixtures in comparison to vapor-liquid equilibrium (VLE) for this system [32,33]. Pervaporation is more efficient than the distillation process within investigated concentration range (Fig.…”

Section: Pervaporation Of Binary Mixturesmentioning

confidence: 99%

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Influence of inorganic salt on the effectiveness of liquid mixtures separation by pervaporation☆

Kujawski

Krajewski

2007

Separation and Purification Technology

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Section: Pervaporation Of Binary Mixturesmentioning

confidence: 99%

“…Solid line-predicted VLE by Xu and Chuang[32] based on the results published by Gmehling and Onken[33].…”

mentioning

confidence: 99%

Influence of inorganic salt on the effectiveness of liquid mixtures separation by pervaporation☆

Kujawski

Krajewski

2007

Separation and Purification Technology

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“…Based on the measured component tray efficiencies by Xu (1997), the efficiency data are estimated for the catalytic distillation tests (see Table 1). It will be shown later that the catalytic distillation process is reaction controlled and the effect of component efficiencies on the removal of acetic acid is not very significant.…”

Section: Mass Transfermentioning

confidence: 99%

“…where Kij is equilibrium constant, which is a very complicated function of the vapor-liquid composition, temperature and pressure, and can be evaluated from equations devcloped by Xu and Chuang (1997). Compared with conventional distillation columns, the model equations for catalytic distillation columns are similar, except for the additional kinetic equations.…”

Section: Model Equationsmentioning

confidence: 99%

“…As shown by Xu and Chuang (1997), the best correlation for the vapor-liquid equilibrium of the methyl acetate- methanol-water-acetic acid system was obtained with the NRTL model in combination with Marek's method (Marek and Standart, 1954;Marek, 1955). This model will be used in the simulation of the catalytic distillation process.…”

Section: Vapor-liquid Equilibriummentioning

confidence: 99%

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Removal of acetic acid from water by catalytic distillation. Part 2: Modeling and simulation studies

Afacan

Chuang

1999

Can J Chem Eng

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A simulation program has been established by incorporating basic models for reaction kinetics, vapor-liquid equilibrium and mass transfer into Aspen Plus (Aspen Technology Inc., 1996) to simulate the catalytic distillation process for the removal of dilute acetic acid from water. The simulated concentration profiles agree well with those measured under various operating conditions. On a etabli un programme de simulation en introduisant des modeles de base pour la cinetique de reaction, I'equilibre Iiquide-vapeur et le transfert de matiere dans Aspen Plus (Aspen Technology Inc., 1996), afin de simuler le procede de distillation catalytique pour le retrait de I'acide acetique dilue dans l'eau. Les profils de concentration simules concordent hen avec ceux mesures dam diverses conditions de fonctionnement.Keywords: simulation, modeling, catalytic distillation, acetic acid, n developing a new process, the experimental data I obtained from a laboratory may not be used directly in the design of the process and equipment because of the limited data points and the small scale of the equipment used in the tests. However, they are essential in the understanding and modeling of the process. When valid models are built based on experimental data, industrial processes and equipment can be simulated for new designs, as well as for the analysis and optimization of the existing process operation.To simulate a catalytic distillation process, basic models such as kinetics and vapor-liquid equilibrium are needed for the specific process and for the specific column internals. Based on the models and mass and energy balance, a group of nonlinear equations andor partial differential equations are developed. The equations are then solved numerically. There exist several commercial simulation packages for solving these equations. Therefore, the focus should be on the establishment of basic models for processes. Stevanovie et al. (1992) studied batch distillation with esterification of acetic acid and ethanol in a 33 mm diameter column packed with the ion exchanger Amberlite-120. They developed a mathematical model by incorporating reaction function with material and enthalpy balance equations for each equilibrium stage. They were able to predict the distillate composition as a function of time for both startup and product periods. However, there is a need to study catalytic distillation processes under continuous operating conditions which are more closely related to industrial opearations. The objective of this work is to simulate a continuous catalytic distillation process for the removal of acetic acid from water. This was done by incorporating models for reaction kinetics, vapor-liquid equilibrium and mass transfer into a commercial simulation program, such as Aspen Plus software (Aspen Technology Inc., 1996). The simulation results are then verified by comparing them with the experimental results reported in Part 1 (Xu et al., 1999).

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Thermodynamics and separation process for quaternary acrylic systems

Zuo

et al. 2015

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com)Vapor-liquid equilibrium (VLE) and liquid-liquid equilibrium (LLE) data of binary and ternary acrylic systems were systematically measured. Subsequently, VLLE phase diagrams of binary systems, tridimensional VLE phase diagrams of methyl acrylate (MA)-methanol (Me)-H 2 O ternary system, and quaternary LLE phase diagrams of MA-Me-H 2 O-methyl acetate (MeOAc) system were constructed. These diagrams clearly demonstrated the effects of temperature on phase equilibrium. The experimental data was fitted by the NRTL and UNIQUAC models, and the best-fitted parameters were used to predict interaction properties of ternary and quaternary mixture. Therefore, the phase equilibrium data were provided as reference for the design of acrylic systems rectification or extraction process. Residue curve was mapped out for MA-Me-H 2 O system through Aspen plus software. Finally, using thermodynamics and residue curve as theoretical basis, two novel separation processes were proposed and applied to the quaternary acrylic systems. V C 2015 American Institute of Chemical Engineers AIChE J, 62: [228][229][230][231][232][233][234][235][236][237][238][239][240] 2016

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Correlation of Vapor−Liquid Equilibrium Data for Methyl Acetate−Methanol−Water−Acetic Acid Mixtures

Cited by 18 publications

References 6 publications

Influence of inorganic salt on the effectiveness of liquid mixtures separation by pervaporation☆

Influence of inorganic salt on the effectiveness of liquid mixtures separation by pervaporation☆

Removal of acetic acid from water by catalytic distillation. Part 2: Modeling and simulation studies

Thermodynamics and separation process for quaternary acrylic systems

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