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...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
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2011
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| Online Access: | http://eprints.um.edu.my/12879/1/424.pdf |
| _version_ | 1825720252408791040 |
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| author | Teoh, W.H. Mammucari, R. Foster, N.R. |
| author_facet | Teoh, W.H. Mammucari, R. Foster, N.R. |
| author_sort | Teoh, W.H. |
| collection | UM |
| 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. |
| first_indexed | 2024-03-06T05:32:18Z |
| format | Conference or Workshop Item |
| id | um.eprints-12879 |
| institution | Universiti Malaya |
| language | English |
| last_indexed | 2024-03-06T05:32:18Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | 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. |
| 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 |
| title | 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_short | 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 |
| topic | TP Chemical technology |
| url | http://eprints.um.edu.my/12879/1/424.pdf |
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