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Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k

Solubility measurements were conducted for (1-x) water – x ethanol mixtures at mole fractions, x = 0, 0.02, 0.03 and 0.04 of ethanol in pressurized water/ethanol system at 50 bar between 393 K and 473 K. A static equilibrium method was utilized to measure the solubilities of anthracene. Experimental...

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Main Authors: Teoh, W.H., Mammucari, R., Foster, N.R.
Format: Conference or Workshop Item
Language:English
Published: 2011
Subjects:
TP Chemical technology
Online Access:http://eprints.um.edu.my/12879/1/424.pdf
http://eprints.um.edu.my/12879/
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spelling my.um.eprints.128792015-03-02T01:35:16Z http://eprints.um.edu.my/12879/ Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k Teoh, W.H. Mammucari, R. Foster, N.R. TP Chemical technology Solubility measurements were conducted for (1-x) water – x ethanol mixtures at mole fractions, x = 0, 0.02, 0.03 and 0.04 of ethanol in pressurized water/ethanol system at 50 bar between 393 K and 473 K. A static equilibrium method was utilized to measure the solubilities of anthracene. Experimental data shows that the addition of a small amount of a volatile co-solvent to an aqueus mixture enhances the solubility of a hydrophobic compound. It was found that the addition of ethanol is much more effective in enhancing the solubility of anthracene at the higher temperatures. At every concentration of ethanol studied, a plot of the log of solubility of anthracene versus temperature yields a near linear plot. Thermodynamic functions of transfer from water to water/ethanol mixtures were also derived from solubility data. The free energy of transfer for anthracene was found to decrease with the increase of x; validating that anthracene is less hydrophobic as the concentration of ethanol increases. The present study extends the database for polyaromatic hydrocarbon solubilities in subcritical water system in the presence of a volatile co-solvent. It is concluded that the use of a small amount of co-solvent in a subcritical water system can expand the use of subcritical technology while maintaining relatively mild operating conditions. 2011-09 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.um.edu.my/12879/1/424.pdf Teoh, W.H. and Mammucari, R. and Foster, N.R. (2011) Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k. In: CHEMECA Annual Conference 2011, 18-21 Sep 2011, Sydney, Australia.
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Teoh, W.H.
Mammucari, R.
Foster, N.R.
Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k
description Solubility measurements were conducted for (1-x) water – x ethanol mixtures at mole fractions, x = 0, 0.02, 0.03 and 0.04 of ethanol in pressurized water/ethanol system at 50 bar between 393 K and 473 K. A static equilibrium method was utilized to measure the solubilities of anthracene. Experimental data shows that the addition of a small amount of a volatile co-solvent to an aqueus mixture enhances the solubility of a hydrophobic compound. It was found that the addition of ethanol is much more effective in enhancing the solubility of anthracene at the higher temperatures. At every concentration of ethanol studied, a plot of the log of solubility of anthracene versus temperature yields a near linear plot. Thermodynamic functions of transfer from water to water/ethanol mixtures were also derived from solubility data. The free energy of transfer for anthracene was found to decrease with the increase of x; validating that anthracene is less hydrophobic as the concentration of ethanol increases. The present study extends the database for polyaromatic hydrocarbon solubilities in subcritical water system in the presence of a volatile co-solvent. It is concluded that the use of a small amount of co-solvent in a subcritical water system can expand the use of subcritical technology while maintaining relatively mild operating conditions.
format Conference or Workshop Item
author Teoh, W.H.
Mammucari, R.
Foster, N.R.
author_facet Teoh, W.H.
Mammucari, R.
Foster, N.R.
author_sort Teoh, W.H.
title Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k
title_short Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k
title_full Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k
title_fullStr Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k
title_full_unstemmed Ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k
title_sort ternary solubilities of anthracene in pressurized binary water/ethanol mixtures at temperatures ranging from 393 k to 473 k
publishDate 2011
url http://eprints.um.edu.my/12879/1/424.pdf
http://eprints.um.edu.my/12879/
_version_ 1643689400989646848
score 13.211869

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