Isobaric Vapor - Liquid Equilibria of Gasoline Additives Systems At 101.3 kPa
In this study, isobaric vapor-liquid equilibrium of gasoline additives for threeternary systems: “MTBE + Ethanol + 2-Methyl-2-propanol”, “Ethanol + 2-Methyl-2-propanol + Octane”, and “MTBE + Ethanol + Octane” at 101.3kPa arestudied. Furthermore three binary systems: “ethanol + 2-Methyl-2-propanol”,“...
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| Format: | Article |
| Language: | English |
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Unviversity of Technology- Iraq
2010-03-01
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| Series: | Engineering and Technology Journal |
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| Online Access: | https://etj.uotechnology.edu.iq/article_27217_5e677df4338e58efe4e8dfd08793522f.pdf |
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| author | Khalid Farhod Chasib Al-Jiboury Rawa Khamas |
| author_facet | Khalid Farhod Chasib Al-Jiboury Rawa Khamas |
| author_sort | Khalid Farhod Chasib Al-Jiboury |
| collection | DOAJ |
| description | In this study, isobaric vapor-liquid equilibrium of gasoline additives for threeternary systems: “MTBE + Ethanol + 2-Methyl-2-propanol”, “Ethanol + 2-Methyl-2-propanol + Octane”, and “MTBE + Ethanol + Octane” at 101.3kPa arestudied. Furthermore three binary systems: “ethanol + 2-Methyl-2-propanol”,“MTBE + Ethanol”, and “MTBE + Octane” at 101.3 kPa have been studied.The binary system “MTBE + Ethanol” forms minimum boiling azeotrope.The azeotrope data are x1(AZ) =0.955 mole fraction and T(AZ) =327.94 K. Theother ternary systems and the other binary systems do not form azeotrope.All the literature data used passed successfully the test for thermodynamicconsistency using McDermott-Ellis test method.In this study the calculation of VLE K–values is done by using threemethods, the first method uses modified Soave Redlich and Kwong (SRK),modified Peng and Robinson (PR) equations of state for two phases. The secondmethod uses SRK-EOS for vapor phase with (NRTL, UNIQUAC and UNIFACactivity coefficient models) for liquid phase and using PR-EOS for vapor phasewith (NRTL, UNIQUAC and UNIFAC activity coefficient models) for liquidphase. The third method uses the Wong- Sandler mixing rules and the PRSV- EOSbased on GE of (NRTL and UNIQUAC activity coefficient models).The non ideality of both vapor and liquid phases for the literature data forthe ternary and binary systems have been accounted for predicting VLE K–valuesusing the maximum likelihood principle for parameter estimation which provides amathematical and computational guarantee of global optimality in parametersestimation.The Wong- Sandler mixing rules and the PRSV- EOS based on excess Gibbs freeenergy GE of NRTL activity coefficient model give more accurate results forcorrelation and prediction of the K-values than other methods for the ternary andbinary systems which contain asymmetric and polar compounds. |
| first_indexed | 2024-03-08T06:08:09Z |
| format | Article |
| id | doaj.art-05073df1db7a44a9bcfa0b4e5aaa8f11 |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T06:08:09Z |
| publishDate | 2010-03-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-05073df1db7a44a9bcfa0b4e5aaa8f112024-02-04T17:45:03ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582010-03-012871361138510.30684/etj.28.7.827217Isobaric Vapor - Liquid Equilibria of Gasoline Additives Systems At 101.3 kPaKhalid Farhod Chasib Al-Jiboury0Rawa Khamas1Chemical Engineering Department , University of Technology / BaghdadChemical Engineering Department , University of Technology / BaghdadIn this study, isobaric vapor-liquid equilibrium of gasoline additives for threeternary systems: “MTBE + Ethanol + 2-Methyl-2-propanol”, “Ethanol + 2-Methyl-2-propanol + Octane”, and “MTBE + Ethanol + Octane” at 101.3kPa arestudied. Furthermore three binary systems: “ethanol + 2-Methyl-2-propanol”,“MTBE + Ethanol”, and “MTBE + Octane” at 101.3 kPa have been studied.The binary system “MTBE + Ethanol” forms minimum boiling azeotrope.The azeotrope data are x1(AZ) =0.955 mole fraction and T(AZ) =327.94 K. Theother ternary systems and the other binary systems do not form azeotrope.All the literature data used passed successfully the test for thermodynamicconsistency using McDermott-Ellis test method.In this study the calculation of VLE K–values is done by using threemethods, the first method uses modified Soave Redlich and Kwong (SRK),modified Peng and Robinson (PR) equations of state for two phases. The secondmethod uses SRK-EOS for vapor phase with (NRTL, UNIQUAC and UNIFACactivity coefficient models) for liquid phase and using PR-EOS for vapor phasewith (NRTL, UNIQUAC and UNIFAC activity coefficient models) for liquidphase. The third method uses the Wong- Sandler mixing rules and the PRSV- EOSbased on GE of (NRTL and UNIQUAC activity coefficient models).The non ideality of both vapor and liquid phases for the literature data forthe ternary and binary systems have been accounted for predicting VLE K–valuesusing the maximum likelihood principle for parameter estimation which provides amathematical and computational guarantee of global optimality in parametersestimation.The Wong- Sandler mixing rules and the PRSV- EOS based on excess Gibbs freeenergy GE of NRTL activity coefficient model give more accurate results forcorrelation and prediction of the K-values than other methods for the ternary andbinary systems which contain asymmetric and polar compounds.https://etj.uotechnology.edu.iq/article_27217_5e677df4338e58efe4e8dfd08793522f.pdfvlegasoline additivesequations of stateactivity coefficient modelmixing rule |
| spellingShingle | Khalid Farhod Chasib Al-Jiboury Rawa Khamas Isobaric Vapor - Liquid Equilibria of Gasoline Additives Systems At 101.3 kPa Engineering and Technology Journal vle gasoline additives equations of state activity coefficient model mixing rule |
| title | Isobaric Vapor - Liquid Equilibria of Gasoline Additives Systems At 101.3 kPa |
| title_full | Isobaric Vapor - Liquid Equilibria of Gasoline Additives Systems At 101.3 kPa |
| title_fullStr | Isobaric Vapor - Liquid Equilibria of Gasoline Additives Systems At 101.3 kPa |
| title_full_unstemmed | Isobaric Vapor - Liquid Equilibria of Gasoline Additives Systems At 101.3 kPa |
| title_short | Isobaric Vapor - Liquid Equilibria of Gasoline Additives Systems At 101.3 kPa |
| title_sort | isobaric vapor liquid equilibria of gasoline additives systems at 101 3 kpa |
| topic | vle gasoline additives equations of state activity coefficient model mixing rule |
| url | https://etj.uotechnology.edu.iq/article_27217_5e677df4338e58efe4e8dfd08793522f.pdf |
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