scholarly journals Treatment of Pharmaceutical Process Wastewater with Hybrid Separation Method: Distillation and Hydrophilic Pervaporation

2018 ◽  
Vol 3 (1) ◽  
pp. 8-13 ◽  
Author(s):  
Andras Jozsef Toth ◽  
Eniko Haaz ◽  
Tibor Nagy ◽  
Ariella Janka Tarjani ◽  
Daniel Fozer ◽  
...  
Keyword(s):  
Cost Estimation ◽  
Distillation Column ◽  
Weight Percent ◽  
Water Mixture ◽  
Ethanol Dehydration ◽  
Hybrid Operation ◽  
Membrane Transfer ◽  
Process Wastewater ◽  
Industrial Problem ◽  
Theoretical Plates

Abstract The work is motivated by an industrial problem, which is alcohol removal from pharmaceutical process wastewater. The aim of the study was to develop a complete hybrid operation is investigated. Ethanol dehydration, in combination with distillation and hydrophilic pervaporation, is used to investigate about the extent of separation of the ethanol-water mixture. The aim of this research is to rigorously model and optimize this hybrid operation in professional flowsheet simulator environment. The number of minimal theoretical plates of distillation column and minimal effective membrane transfer area are determined. Cost estimation is also examined according to Douglas methodology. Considering our results it can be concluded that, the distillation and hydrophilic pervaporation processes are suitable for separation ethanol and water in 99.5 weight percent purity

scholarly journals Modelling of Hybrid Method for VOC Removal from Process Wastewater: Distillation and Hydrophilic Pervaporation

2020 ◽  
Vol 64 (3) ◽  
pp. 364-370
Author(s):  
Botond Szilágyi ◽  
Do Thi Huyen Trang ◽  
Dániel Fózer ◽  
Asmaa Selim ◽  
Enikő Haáz ◽  
...  
Keyword(s):  
Hybrid Method ◽  
Cost Estimation ◽  
Ternary Mixture ◽  
Weight Percent ◽  
Water Mixture ◽  
Distillation Columns ◽  
Alcohol Water ◽  
Process Wastewater ◽  
Methanol Removal ◽  
Hybrid Configuration

The study is motivated by the industrial problem from pharmaceutical industry, which is ethanol and methanol removal from process wastewater. To complete this goal hybrid method is investigated and optimized. Two distillation columns are sufficient for separation of alcohol-water mixture. Suitable water can be purified as bottom product of first column. Ethanol and methanol purification is achieved with combination of second distillation column and pervaporation. The target of this research is to rigorously model and optimize the separation of water-ethanol-methanol ternary mixture in professional flowsheet simulator environment. The minimal sufficient membrane transfers area and number of minimal theoretical stages of the columns are determined. Cost estimation is also investigated according to Douglas methodology. Considering the simulation and economic results it can be determined that, the hybrid configuration is suitable for separation of ternary mixture in 99.5 weight percent purity.

scholarly journals Performance of Appended Wire Mesh Packing in Sieve Tray Distillation Column of Ethanol-Water System

2015 ◽  
Vol 9 (7) ◽  
pp. 148
Author(s):  
Fadlilatul Taufany ◽  
Nonot Soewarno ◽  
Melvina Eliana Sutanto ◽  
Indi Raisa Girsang
Keyword(s):  
Distillation Column ◽  
Water System ◽  
Interfacial Area ◽  
Wire Mesh ◽  
Water Mixture ◽  
Valve Tray ◽  
Sieve Tray ◽  
Distillation System ◽  
Preliminary Study ◽  
The Wire

For the separation process in liquid-liquid mixture such as ethanol-water mixture, a sieve tray distillation columnis an alternatif for affordable process and maintenance. However to date, this sieve tray system is still currentlyhaving a lower Murphee efficiency and smaller interfacial area, as compared to other tray system, that is, either abubble cap or valve tray. Therefore it is of important to optimize the performance of sieve tray distillation bymeans of adding the wire mesh packing on that tray, as being the aim of the present study. This study isconducted by using a batch sieve tray distillation system, where the wire mesh packing is added on the third traythat is calculated from the top of the column, to avoid flooding inside the column. Here the resulting fermentedmolasses of containing a 10% volume of ethanol is used as a mixture distillation feed. The height of the wiremesh packing being studied is varied as 5 cm, 3 cm, and 2 cm. Our results showed that the Murphee efficiencyobtained by the variation of the packing height of 5 cm, 3 cm, 2 cm and without packing were 73.5%, 66.27%,56.86%, and 46.7% respectively, and were increased by subsequent level of the packing height. Thecorresponding hydrodynamic properties of this appended packing sieve tray distillation by means of theinterfacial area were 11.88 cm2/cm3, 0.48 cm2/cm3, and 0.32 cm2/cm3, while its pressure drop measured from thewater manometer height were 38.33 cm H2O/m, 30 cm H2O/m, 10 cm H2O/m for the packing height of 5 cm, 3cm, 2 cm height, respectively. The increasing of the performance of appended packing sieve tray distillation bymeans of the Murphee efficiency is explained by the increasing of the interfacial area for vapour-liquid than thetray itself. This preliminary study is expected to be a pioneer study of strategy to increase the performance ofconventional sieve tray distillation that is known as a kind of affordable distillation process.

Exponential functional rigorous method for calculation of the number of theoretical plates in distillation column

2012 ◽  
Vol 84 ◽  
pp. 628-637 ◽  
Author(s):  
Rui Cao ◽  
Guolei Fu ◽  
Yansheng Liu ◽  
Chaoyu Yan ◽  
Yan Wu ◽  
...  
Keyword(s):  
Distillation Column ◽  
Exponential Functional ◽  
Rigorous Method ◽  
Theoretical Plates

Simulation and Optimization on the Process of Acetic Acid Dehydration via Extraction Combined with Azeotropic Distillation

2012 ◽  
Vol 548 ◽  
pp. 349-354
Author(s):  
Yi Feng Chen ◽  
Ji He Yang
Keyword(s):  
Acetic Acid ◽  
Acetic Acid Solution ◽  
Azeotropic Distillation ◽  
Weight Percent ◽  
Dilute Solution ◽  
Relative Volatility ◽  
Simple Distillation ◽  
Simulation And Optimization ◽  
Isopropyl Acetate ◽  
Theoretical Plates

Some azeotropic entrainers in the process of acetic acid dehydration could extract acetic acid from its dilute solution; this text would observe the ability of extraction about these entrainers mentioned in the literatures. By using the EXTRACT module in Aspen Plus, it is found that isopropyl acetate was the most effective extracting agent. The process of acetic acid dehydration via extraction combined with azeotropic distillation by using isopropyl acetate was established. Acetic acid was first extracted from its dilute solution and then was distilled in the azeotropic column, finally acetic acid having 99.8%(weight percent) purity was obtained. This process avoided evaporating a lot of water from the solution, and the entrainer’s existence effectively enhanced the relative volatility between acetic acid and water. The simulation result indicated that when dealing with the acetic acid solution used in this research, the total heat exhaustion was reduced from 11.73MW to 2.98MW and the number of theoretical plates needed in the distillation was also reduced from 65 to 34 compared with simple distillation.

Poly(vinyl Alcohol)/Cellulose Nanocomposite Pervaporation Membranes for Ethanol Dehydration

2011 ◽  
Vol 675-677 ◽  
pp. 383-386 ◽  
Author(s):  
Lu Bai ◽  
Ping Qu ◽  
Shuai Li ◽  
Yuan Gao ◽  
Li Ping Zhang
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Cellulose Nanocrystals ◽  
Vinyl Alcohol ◽  
Model System ◽  
Poly Vinyl Alcohol ◽  
Permeation Flux ◽  
Water Mixture ◽  
Ethanol Dehydration ◽  
Scanning Electron

In this study, pervaporation membranes were prepared from poly( vinyl alcohol) (PVA) with different amounts of cellulose nanocrystals as filler, and characterized by scanning electron microscopy (SEM). The characterization results demonstrated that cellulose nanocrystal particles dispersed homogeneously within the PVA matrix. Moreover, the pervaporation performance of these membranes was investigated using the separation of ethanol-water mixture as model system. Among all the prepared membranes, PVA/cellulose nanocomposite membrane containing 1 wt% cellulose nanocrystals exhibited the best pervaporation performance, whose averaged permeation flux reduced slightly but separation factor was increased from 83 to 163 for 80% aqueous solution of ethanol at 80 °C respectively.

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