Flash/distillation for separating 2-pentanone/4-heptanone/water azeotropic mixture based equilibrium data and process design

2020 ◽  
Vol 242 ◽  
pp. 116790 ◽  
Author(s):  
Shuai Wang ◽  
Yao Dai ◽  
Huaqing Qi ◽  
Yueteng Hou ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Process Design ◽  
Azeotropic Mixture ◽  
Equilibrium Data ◽  
Flash Distillation

Separation of Azeotropic Mixture Using Multi-stage Ultrasound-Assisted Flash Distillation

2015 ◽  
Vol 10 (4) ◽  
pp. 237-242 ◽  
Author(s):  
Taha Mahdi ◽  
Arshad Ahmad ◽  
Adnan Ripin ◽  
Mohamed Mahmud Nasef
Keyword(s):  
Ethyl Acetate ◽  
Azeotropic Mixture ◽  
Separation Unit ◽  
Multi Stage ◽  
Azeotropic Mixtures ◽  
In Series ◽  
Flash Distillation ◽  
Ultrasound Assisted ◽  
Aspen Custom Modeler

Abstract A mathematical model for an ultrasound-assisted vapor liquid equilibrium (VLE) system developed in Aspen Custom Modeler is exported to Aspen Plus flowsheeting environment to form a block in the software library to represent a single stage flash separation unit. The block is then arranged in series to mimic an ultrasonically intensified distillation process. As a case study, an ethanol/ethyl acetate separation process is examined. The results show that a 99 mol% ethyl acetate recovery is established when a series of 27 flash VLE devices are used. The system is also evaluated for other minimum boiling azeotropic mixtures, and consistent results are obtained, thus revealing the potentials of ultrasound-assisted system as an alternative strategy for azeotropic mixture separations.

Liquid-liquid equilibrium in the water-ethanol-toluene system. Correlation of equilibrium data

1989 ◽  
Vol 54 (3) ◽  
pp. 586-601 ◽  
Author(s):  
Josef P. Novák ◽  
Jaroslav Matouš ◽  
Květuše Říčná ◽  
Vladimír Kubíček
Keyword(s):  
Boiling Point ◽  
Binary Systems ◽  
Azeotropic Mixture ◽  
Liquid Equilibrium ◽  
Equilibrium Data ◽  
Ternary Parameters

Liquid-liquid equilibrium data in the water-ethanol-toluene system were correlated by the superposition of the Wilson and Redlich-Kister equations with a ternary term. The correlation of both homogeneous binary systems was taken from the literature. The ternary liquid-liquid equilibrium data were at all temperatures satisfactorily described on using only three ternary parameters determined from the equilibrium data at 50 °C. The parameters obtained by the correlation yield also a good estimate of boiling point and composition of homogeneous azeotropic mixture.

scholarly journals A Biosorption of Mercury from Wastewater Using Isolated Aspergillus Sp. Modified 1,10-Phenanthroline: Hill Isotherm Model

2017 ◽  
Vol 5 (4) ◽  
pp. 288 ◽  
Author(s):  
Shameran J. Salih ◽  
Sewgil S. Anwer ◽  
Rezhna H. Faraj
Keyword(s):  
Process Design ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Dead Cell ◽  
Adsorption Parameters ◽  
Hill Model ◽  
Equilibrium Data ◽  
Aspergillus Sp ◽  
Langmuir And Freundlich Models

Equilibrium biosorption of mercury (II) onto new developed biosorbent (1,10-phenanthroline-graft- cell/Filamentous fungi) in both free, immobilized and dead cell were investigated. The product was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). In this work several isotherm models applied to predict the process design for the adsorption system. Hill, Sips, Langmuir and Freundlich utilized to determine the adsorption parameters, the equilibrium data fitted well to Hill and Sips isotherm models followed by Langmuir. Meanwhile, the maximum adsorption capacity proposed by Hill model was 78.67(mg/g) and Sips 78.42(mg/g) were lower than Langmuir models which was 85.16(mg/g). In other hand, the equilibrium data almost fitted to the Freundlich isotherm supporting the postulation of the heterogeneous shape of biosorption to certain range. Hence, On the bases of Langmuir model the biosorption of Hg2+ onto 1,10-phenanthroline-graft- cell/Filamentous was in the favourable area and that confirmed by calculating the separation factor (RL< 1). Nevertheless, new isotherm (Eq. 4) has been derived by the combination of a Langmuir and Freundlich models. The new model agreed well enough (R2 = 0.9863) with the experimental data.

scholarly journals Thermophysical Properties of Mixtures of Titanium(IV) Isopropoxide (TTIP) and p-Xylene

2021 ◽  
Author(s):  
Alexander Keller ◽  
Irenäus Wlokas ◽  
Maximilian Kohns ◽  
Hans Hasse
Keyword(s):  
Thermophysical Properties ◽  
Process Design ◽  
Empirical Correlations ◽  
Liquid Equilibrium ◽  
Specific Density ◽  
Vapor Liquid Equilibrium ◽  
Self Diffusion ◽  
Spray Flame ◽  
Equilibrium Data ◽  
Vapor Liquid

Titanium(IV) isopropoxide (TTIP) is an important precursor for the production of nanoparticles by spray flame processes. In these processes, the precursor is provided in a solution in a combustible solvent, which is p-xylene here. As no thermophysical data for solutions of TTIP in p-xylene were available in the literature, they were measured in the present work. The vapor–liquid equilibrium was measured at pressures ranging from 20 to 80 kPa. The specific density, viscosity, thermal conductivity, molar isobaric heat capacity, and self-diffusion coefficients were determined experimentally at 101.3 kPa at temperatures between 293.15 and 373.15 K. Sample compositions cover the range from pure TTIP to pure p-xylene. Chemical reactions in the studied system were considered. The experiments were carried out in such a way that they do not compromise the results for the thermophysical properties. The vapor–liquid equilibrium data were correlated using the NRTL model. Empirical correlations were established for the other properties. The results provide a rational basis for spray flame process design.

Equilibrium data and process design for adsorption of disperse dyes onto Alunite

2004 ◽  
Vol 45 (6) ◽  
pp. 762-768 ◽  
Author(s):  
Mahmut �zacar ◽  
I. Ayhan Sengil
Keyword(s):  
Process Design ◽  
Disperse Dyes ◽  
Equilibrium Data

Aspen Plus Simulation of Ultrasound Assisted Distillation for Separating Azeotropic Mixture

2015 ◽  
Vol 1113 ◽  
pp. 710-714
Author(s):  
Taha Mahdi ◽  
Arshad Ahmad ◽  
Adnan Ripin ◽  
Mohamed Mahmoud Nasef ◽  
Olagoke Oladokun
Keyword(s):  
Ethyl Acetate ◽  
Aspen Plus ◽  
Azeotropic Mixture ◽  
Distillation Process ◽  
Equilibrium System ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Flash Distillation ◽  
Aspen Custom Modeler ◽  
Vapor Liquid

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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