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Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process

The main objective of this study is to develop an ultrasound-assisted distillation process that can break minimum boiling azeotropes under various operating conditions for enhancing the effectiveness of distillation processes in providing solution to high purity separation requirement. As a case stu...

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Main Author: Abdul Hamza, Taha Mahdi
Format: Thesis
Language:English
Published: 2015
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/77951/1/TahaMahdiAbdulPFChE2015.pdf
http://eprints.utm.my/id/eprint/77951/
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spelling my.utm.779512018-07-18T07:36:54Z http://eprints.utm.my/id/eprint/77951/ Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process Abdul Hamza, Taha Mahdi TP Chemical technology The main objective of this study is to develop an ultrasound-assisted distillation process that can break minimum boiling azeotropes under various operating conditions for enhancing the effectiveness of distillation processes in providing solution to high purity separation requirement. As a case study, ethanol/ethyl acetate (ETOH/ETAC) separation process was considered. The effect of both intensity and frequency of the ultrasonic waves on the vapor–liquid equilibrium (VLE) of this system was experimentally studied. The sonication was found to affect the VLE significantly in a way which led to an alteration in the relative volatility and a complete elimination of the azeotropic point, with the preference towards a combination of low frequency and high intensity operation. A mathematical model describing the system was developed based on conservation principles, VLE of the system and sonication effects. The model, which took into account a single-stage VLE system enhanced with ultrasonic waves, was coded using the Aspen Custom Modeler. The effects of ultrasonic waves on the relative volatility and azeotropic point were examined and the experimental data were successfully used in validating the model with a reasonable accuracy. The mathematical model was exported to the Aspen Plus to form a model that represents the sonication equilibrium stages, which were connected serially to configure an ultrasound-assisted distillation (UAD) process for separation of ETOH/ETAC mixture. The simulation results revealed that ETAC can be recovered from the azeotropic mixture with a purity of 99 mol% using 27 sonication stages. To validate the suitability of UAD process for separation of other minimum boiling azeotropes, separation of other mixtures were tested such as ethanol/water, methanol/methyl acetate and nbutanol/ water. The developed model was found to have some limitations with respect to separation of maximum boiling azeotropes. 2015-01 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/77951/1/TahaMahdiAbdulPFChE2015.pdf Abdul Hamza, Taha Mahdi (2015) Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process. PhD thesis, Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:96494
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Abdul Hamza, Taha Mahdi
Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process
description The main objective of this study is to develop an ultrasound-assisted distillation process that can break minimum boiling azeotropes under various operating conditions for enhancing the effectiveness of distillation processes in providing solution to high purity separation requirement. As a case study, ethanol/ethyl acetate (ETOH/ETAC) separation process was considered. The effect of both intensity and frequency of the ultrasonic waves on the vapor–liquid equilibrium (VLE) of this system was experimentally studied. The sonication was found to affect the VLE significantly in a way which led to an alteration in the relative volatility and a complete elimination of the azeotropic point, with the preference towards a combination of low frequency and high intensity operation. A mathematical model describing the system was developed based on conservation principles, VLE of the system and sonication effects. The model, which took into account a single-stage VLE system enhanced with ultrasonic waves, was coded using the Aspen Custom Modeler. The effects of ultrasonic waves on the relative volatility and azeotropic point were examined and the experimental data were successfully used in validating the model with a reasonable accuracy. The mathematical model was exported to the Aspen Plus to form a model that represents the sonication equilibrium stages, which were connected serially to configure an ultrasound-assisted distillation (UAD) process for separation of ETOH/ETAC mixture. The simulation results revealed that ETAC can be recovered from the azeotropic mixture with a purity of 99 mol% using 27 sonication stages. To validate the suitability of UAD process for separation of other minimum boiling azeotropes, separation of other mixtures were tested such as ethanol/water, methanol/methyl acetate and nbutanol/ water. The developed model was found to have some limitations with respect to separation of maximum boiling azeotropes.
format Thesis
author Abdul Hamza, Taha Mahdi
author_facet Abdul Hamza, Taha Mahdi
author_sort Abdul Hamza, Taha Mahdi
title Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process
title_short Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process
title_full Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process
title_fullStr Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process
title_full_unstemmed Enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process
title_sort enhanced separation of azeotropic mixtures by ultrasound-assisted distillation process
publishDate 2015
url http://eprints.utm.my/id/eprint/77951/1/TahaMahdiAbdulPFChE2015.pdf
http://eprints.utm.my/id/eprint/77951/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:96494
_version_ 1643657682864832512
score 13.211869

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