Vapor-liquid equilibrium of ethanol/ethyl acetate mixture in ultrasonic intensified environment

Mahdi, Taha; Ahmad, Arshad; Ripin, Adnan; Nasef, Mohamed Mahmoud

doi:10.1007/s11814-014-0011-9

Cited by 6 publications

(6 citation statements)

References 36 publications

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“…In another perspective, sonication has also been shown to positively impact the Vapor-Liquid Equilibrium (VLE) of azeotropic mixtures (Ripin et al, 2009). Similar trends are also obtained on other compounds including ethanol-ethyl acetate mixture (Mahdi et al, 2014). Inspired by these results, a mathematical model of a single stage VLE system has been derived and validated (Mahdi et al, 2015b) and based on this model, the design of an ultrasonically intensified distillation system based is proposed and elaborated in this study.…”

Section: Introductionsupporting

confidence: 56%

A Simulation Study of Enhanced Distillation Using Ultrasound Waves for the Separation of Azeotropic Mixtures

Mahdi¹,

Al-Kawaz²

2018

American Journal of Engineering and Applied Sciences

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The potential of ultrasound waves to enhance distillation system for azeotropic mixture is examined through process flowsheeting using Aspen Plus. Since sonication is not a standard feature in the software library, a mathematical model of the proposed distillation system is developed based on first principles in Aspen Custom Modeler and later exported to Aspen Plus environment for process simulation and design studies. Ethyl acetate and ethanol mixture is used as a case study, with a target of producing 99% pure top product from a feed containing 65% ethyl acetate. Sensitivity analyses are carried out to examine the influence of various design and operating variables of the top product's purity and heat duties. When compared to extractive distillation, the proposed ultrasonic distillation process offers a 14.6% savings of operation costs. The proposed distillation system has also been tested for other azeotropic mixtures with similar success.

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Section: Introductionsupporting

confidence: 56%

A Simulation Study of Enhanced Distillation Using Ultrasound Waves for the Separation of Azeotropic Mixtures

Mahdi¹,

Al-Kawaz²

2018

American Journal of Engineering and Applied Sciences

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“…Model Validation. It has already been experimentally illustrated in previous paper [12] that the ultrasonic waves can significantly enhance the VLE data of ethanol / ethyl acetate mixture by azeotropic point shifted upwards from the standard curve and enhance the relative volatility leads to the separation of this mixture at high purity.…”

Section: Resultsmentioning

confidence: 77%

Ultrasonic Enhancement of Separation Azeotropic Mixtures via Single Distillation Column

Mahdi

Ahmad

Ripin

et al. 2014

AMR

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The separation of azeotropic mixtures is conventionally one of the most challenging tasks in industrial processes as their separation by a simple distillation is basically impossible. Vapor-liquid equilibrium (VLE) equations with ultrasonic technique was based on a number of assumptions need to be built model on MATLAB software and compared the results with experimental work to validity the model. As a case study, the influence of ultrasonic intensity and frequency on the VLE of ethanolethyl acetate mixture was investigated, and a combination of five ultrasonic intensities (from 100 and 500 W/cm2) and three frequencies (from 25 to 70 kHz) were used. It is noted that with increase the ultrasound intensity and decrease the frequency can be improved the azeotropic point and relative volatility of the mixture. The results revealed that ultrasonic waves had the potential to enhance separation of azeotropic mixtures in a distillation column.

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“…The ability of sonication in facilitating the separation of azeotropic mixture of ETAC/ETOH has been experimentally illustrated in previous work [5] the azeotropic point has been shifted upwards from the standard curve, increasing the relative volatility and ease of separation towards high purity. To expedite further the much-needed developments, a mathematical model of the system based on conservation principles, VLE and bubble dynamics under the influence of sonication was developed [8].…”

Section: Case Study: Ethanol-ethyl Acetatementioning

confidence: 92%

“…It was introduced in the 80's to describe the strategy of reducing the size of chemical plant needed to achieve a given production objective, which can effectively be realized by exploiting the process equipment technology or properties of materials involved in the process [3]. One such strategy is to make use of sonication phenomena in altering the VLE of azeotropic mixtures [4,5]. This is driven by the micro-point vacuum conditions generated within the liquid during bubbles formation, which is a condition desirable for breaking azeotropes [6,7].…”

Section: Introductionmentioning

confidence: 99%

Aspen Plus Simulation of Ultrasound Assisted Distillation for Separating Azeotropic Mixture

Mahdi

Ahmad

Ripin

et al. 2015

AMR

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Earlier works have proved the potentials of altering the vapor liquid equilibrium of azeotropic mixture by sonication phenomena. In this work a mathematical model of a single stage vapor-liquid equilibrium system developed in Aspen Custom Modeler is exported to Aspen Plus to represent one stage of ultrasonic flash distillation (USF). The USF modules are connected serially to mimic a distillation process. As a case study, the separation of ethanol-ethyl acetate mixture is considered. The final targeted composition of 99 mole % of ethyl acetate was achieved when 27 USF modules were used despite the fact that the mixture form azeotrope at 55 mole % ethyl acetate. The results reinforced the anticipated potentials of sonication phenomena in intensifying distillation process to overcome azeotropes, and provide useful insights for the development of a pilot-scaled facility that is currently under development.

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Vapor-liquid equilibrium of ethanol/ethyl acetate mixture in ultrasonic intensified environment

Cited by 6 publications

References 36 publications

A Simulation Study of Enhanced Distillation Using Ultrasound Waves for the Separation of Azeotropic Mixtures

A Simulation Study of Enhanced Distillation Using Ultrasound Waves for the Separation of Azeotropic Mixtures

Ultrasonic Enhancement of Separation Azeotropic Mixtures via Single Distillation Column

Aspen Plus Simulation of Ultrasound Assisted Distillation for Separating Azeotropic Mixture

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