Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – Part II: C18 fatty acids
In this work, activity coefficients at infinite dilution (c113) have been measured for 21 solutes (subscript 1) (alkanes, cycloalkanes, alkenes, aromatic compounds, alcohols, esters, ketones, and halogenated hydro carbons), in four solvents (subscript 3), namely one saturated fatty acid and three un...
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ri-123456789-449792021-11-23T12:42:18Z Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – Part II: C18 fatty acids Chiavone Filho, Osvaldo Belting, Patrícia Castro Rarey, Jürgen Gmehling, Jürgen Ceriani, Roberta Meirelles, Antonio José de Almeida Stearic acid Oleic acid Linoleic acid Linolenic acid Limiting activity coefficient Gas–liquid chromatography method In this work, activity coefficients at infinite dilution (c113) have been measured for 21 solutes (subscript 1) (alkanes, cycloalkanes, alkenes, aromatic compounds, alcohols, esters, ketones, and halogenated hydro carbons), in four solvents (subscript 3), namely one saturated fatty acid and three unsaturated fatty acids: stearic (octadecanoic) acid – C18:0, oleic (cis-9-octadecenoic) acid – C18:1 9c, linoleic (cis,cis-9,12- octadecadienoic) acid – C18:2 9c12c, and linolenic (cis,cis,cis-9,12,15-octadecatrienoic) acid – C18:3 9c12c15c, by gas–liquid chromatography. The measurements were carried out at temperatures from (303.13 to 368.19) K and the partial molar excess Gibbs free energy (DGE;11 ), enthalpy (DHE;11 ), and entropy (DSE;11 ), at infinite dilution were calculated from experimental c113 values obtained over the tem- perature range. The uncertainties in determination of c113 and DHE;11 are 4% and 20%, respectively. The results for stearic acid obtained in this study have been compared to those available in the Dortmund Data Bank (DDB). The real behaviour of fatty systems could be better understood through the results obtained in this work 2021-11-23T12:41:50Z 2021-11-23T12:41:50Z 2013-05 article BELTING, P. C.; RAREY, J.; GMEHLING, J.; CERIANI, R.; CHIAVONE-FILHO, Osvaldo; MEIRELLES, A. J. A.. Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds - Part II: C18 fatty acids. Journal of Chemical Thermodynamics, v. 60, p. 142-149, 2013. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0021961412004661?via%3Dihub. Acesso em: 22 jun. 2021. https://doi.org/10.1016/j.jct.2012.12.009. 1934-7383 https://repositorio.ufrn.br/handle/123456789/44979 10.1016/j.jct.2012.12.009 en Attribution-NonCommercial 3.0 Brazil http://creativecommons.org/licenses/by-nc/3.0/br/ application/pdf Elsevier |
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English |
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Stearic acid Oleic acid Linoleic acid Linolenic acid Limiting activity coefficient Gas–liquid chromatography method |
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Stearic acid Oleic acid Linoleic acid Linolenic acid Limiting activity coefficient Gas–liquid chromatography method Chiavone Filho, Osvaldo Belting, Patrícia Castro Rarey, Jürgen Gmehling, Jürgen Ceriani, Roberta Meirelles, Antonio José de Almeida Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – Part II: C18 fatty acids |
| description |
In this work, activity coefficients at infinite dilution (c113) have been measured for 21 solutes (subscript 1) (alkanes, cycloalkanes, alkenes, aromatic compounds, alcohols, esters, ketones, and halogenated hydro carbons), in four solvents (subscript 3), namely one saturated fatty acid and three unsaturated fatty acids:
stearic (octadecanoic) acid – C18:0, oleic (cis-9-octadecenoic) acid – C18:1 9c, linoleic (cis,cis-9,12- octadecadienoic) acid – C18:2 9c12c, and linolenic (cis,cis,cis-9,12,15-octadecatrienoic) acid – C18:3
9c12c15c, by gas–liquid chromatography. The measurements were carried out at temperatures from
(303.13 to 368.19) K and the partial molar excess Gibbs free energy (DGE;11 ), enthalpy (DHE;11 ), and
entropy (DSE;11 ), at infinite dilution were calculated from experimental c113 values obtained over the tem-
perature range. The uncertainties in determination of c113 and DHE;11 are 4% and 20%, respectively. The results for stearic acid obtained in this study have been compared to those available in the Dortmund Data Bank (DDB). The real behaviour of fatty systems could be better understood through the results obtained in this work |
| format |
article |
| author |
Chiavone Filho, Osvaldo Belting, Patrícia Castro Rarey, Jürgen Gmehling, Jürgen Ceriani, Roberta Meirelles, Antonio José de Almeida |
| author_facet |
Chiavone Filho, Osvaldo Belting, Patrícia Castro Rarey, Jürgen Gmehling, Jürgen Ceriani, Roberta Meirelles, Antonio José de Almeida |
| author_sort |
Chiavone Filho, Osvaldo |
| title |
Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – Part II: C18 fatty acids |
| title_short |
Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – Part II: C18 fatty acids |
| title_full |
Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – Part II: C18 fatty acids |
| title_fullStr |
Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – Part II: C18 fatty acids |
| title_full_unstemmed |
Activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – Part II: C18 fatty acids |
| title_sort |
activity coefficient at infinite dilution measurements for organic solutes (polar and non-polar) in fatty compounds – part ii: c18 fatty acids |
| publisher |
Elsevier |
| publishDate |
2021 |
| url |
https://repositorio.ufrn.br/handle/123456789/44979 |
| work_keys_str_mv |
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