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Calorimetric measurement of molar excess enthalpies of dilute solutions of ethylbenzene + higher n -alkanes

Identifieur interne : 001665 ( Istex/Corpus ); précédent : 001664; suivant : 001666

Calorimetric measurement of molar excess enthalpies of dilute solutions of ethylbenzene + higher n -alkanes

Auteurs : P. M. Ghogomu ; M. Bouroukba ; J. Dellacherie ; D. Balesdent ; M. Dirand

Source :

RBID : ISTEX:DAB664797475C99B7C420EE99E6A8D8F98BAD705

English descriptors

Abstract

Abstract: Flow calorimetry has been used to measure the excess enthalpies (heats of mixing) of dilute solutions of higher n-alkanes (hexadecane to pentacosane) in ethylbenzene. The results show that at constant temperature and composition, hE increases with the number of carbon atoms in the n-alkane molecule. Also, for each alkane, hE decreases with increasing temperature, at constant composition. A simple analytical expression is used to represent the variation of hE with carbon number n, composition x, and temperature T in the domain (16 ≤ n ≤ 25; x ≤ 0.15; 298.15 ≤ T ≤ 330.00).

Url:
DOI: 10.1016/S0040-6031(97)00235-9

Links to Exploration step

ISTEX:DAB664797475C99B7C420EE99E6A8D8F98BAD705

Le document en format XML

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<ce:cross-ref refid="AFF2">
<ce:sup>b</ce:sup>
</ce:cross-ref>
</ce:author>
<ce:author>
<ce:given-name>D.</ce:given-name>
<ce:surname>Balesdent</ce:surname>
<ce:cross-ref refid="AFF2">
<ce:sup>b</ce:sup>
</ce:cross-ref>
</ce:author>
<ce:author>
<ce:given-name>M.</ce:given-name>
<ce:surname>Dirand</ce:surname>
<ce:cross-ref refid="COR1">
<ce:sup></ce:sup>
</ce:cross-ref>
<ce:cross-ref refid="AFF2">
<ce:sup>b</ce:sup>
</ce:cross-ref>
<ce:e-address>mdirand@ensic.u-nancy.fr</ce:e-address>
</ce:author>
<ce:affiliation id="AFF1">
<ce:label>a</ce:label>
<ce:textfn>Department of Inorganic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon</ce:textfn>
</ce:affiliation>
<ce:affiliation id="AFF2">
<ce:label>b</ce:label>
<ce:textfn>Ecole Nationale Supérieure des Industries Chimiques (INPL), Laboratoire de Thermodynamique des Séparations I Rue Grandville, B.P. 451, 54001 Nancy, France</ce:textfn>
</ce:affiliation>
<ce:correspondence id="COR1">
<ce:label></ce:label>
<ce:text>Corresponding author. Fax: (33) 03 83.35.08.11</ce:text>
</ce:correspondence>
</ce:author-group>
<ce:date-received day="7" month="11" year="1996"></ce:date-received>
<ce:date-accepted day="29" month="5" year="1997"></ce:date-accepted>
<ce:abstract>
<ce:section-title>Abstract</ce:section-title>
<ce:abstract-sec>
<ce:simple-para>Flow calorimetry has been used to measure the excess enthalpies (heats of mixing) of dilute solutions of higher
<ce:italic>n</ce:italic>
-alkanes (hexadecane to pentacosane) in ethylbenzene. The results show that at constant temperature and composition,
<ce:italic>h</ce:italic>
<ce:sup>E</ce:sup>
increases with the number of carbon atoms in the
<ce:italic>n</ce:italic>
-alkane molecule. Also, for each alkane,
<ce:italic>h</ce:italic>
<ce:sup>E</ce:sup>
decreases with increasing temperature, at constant composition.</ce:simple-para>
<ce:simple-para>A simple analytical expression is used to represent the variation of
<ce:italic>h</ce:italic>
<ce:sup>E</ce:sup>
with carbon number
<ce:italic>n</ce:italic>
, composition
<ce:italic>x</ce:italic>
, and temperature
<ce:italic>T</ce:italic>
in the domain (16 ≤
<ce:italic>n</ce:italic>
≤ 25;
<ce:italic>x</ce:italic>
≤ 0.15; 298.15 ≤
<ce:italic>T</ce:italic>
≤ 330.00).</ce:simple-para>
</ce:abstract-sec>
</ce:abstract>
<ce:keywords>
<ce:section-title>Keywords</ce:section-title>
<ce:keyword>
<ce:text>Excess thermodynamic properties</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>
<ce:italic>n</ce:italic>
-alkanes</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>Solvent</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>Crystallization</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>Wax</ce:text>
</ce:keyword>
<ce:keyword>
<ce:text>Petroleum</ce:text>
</ce:keyword>
</ce:keywords>
</head>
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<title>Calorimetric measurement of molar excess enthalpies of dilute solutions of ethylbenzene + higher n -alkanes</title>
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<title>Calorimetric measurement of molar excess enthalpies of dilute solutions of ethylbenzene + higher</title>
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<name type="personal">
<namePart type="given">P.M.</namePart>
<namePart type="family">Ghogomu</namePart>
<affiliation>Department of Inorganic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
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</name>
<name type="personal">
<namePart type="given">M.</namePart>
<namePart type="family">Bouroukba</namePart>
<affiliation>Ecole Nationale Supérieure des Industries Chimiques (INPL), Laboratoire de Thermodynamique des Séparations I Rue Grandville, B.P. 451, 54001 Nancy, France</affiliation>
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<name type="personal">
<namePart type="given">J.</namePart>
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<affiliation>Ecole Nationale Supérieure des Industries Chimiques (INPL), Laboratoire de Thermodynamique des Séparations I Rue Grandville, B.P. 451, 54001 Nancy, France</affiliation>
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<name type="personal">
<namePart type="given">D.</namePart>
<namePart type="family">Balesdent</namePart>
<affiliation>Ecole Nationale Supérieure des Industries Chimiques (INPL), Laboratoire de Thermodynamique des Séparations I Rue Grandville, B.P. 451, 54001 Nancy, France</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">M.</namePart>
<namePart type="family">Dirand</namePart>
<affiliation>Corresponding author. Fax: (33) 03 83.35.08.11</affiliation>
<affiliation>Ecole Nationale Supérieure des Industries Chimiques (INPL), Laboratoire de Thermodynamique des Séparations I Rue Grandville, B.P. 451, 54001 Nancy, France</affiliation>
<affiliation>E-mail: mdirand@ensic.u-nancy.fr</affiliation>
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<dateIssued encoding="w3cdtf">1997</dateIssued>
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<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
<languageTerm type="code" authority="rfc3066">en</languageTerm>
</language>
<abstract lang="en">Abstract: Flow calorimetry has been used to measure the excess enthalpies (heats of mixing) of dilute solutions of higher n-alkanes (hexadecane to pentacosane) in ethylbenzene. The results show that at constant temperature and composition, hE increases with the number of carbon atoms in the n-alkane molecule. Also, for each alkane, hE decreases with increasing temperature, at constant composition. A simple analytical expression is used to represent the variation of hE with carbon number n, composition x, and temperature T in the domain (16 ≤ n ≤ 25; x ≤ 0.15; 298.15 ≤ T ≤ 330.00).</abstract>
<subject>
<genre>Keywords</genre>
<topic>Excess thermodynamic properties</topic>
<topic>n-alkanes</topic>
<topic>Solvent</topic>
<topic>Crystallization</topic>
<topic>Wax</topic>
<topic>Petroleum</topic>
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<title>Thermochimica Acta</title>
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<dateIssued encoding="w3cdtf">19971022</dateIssued>
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<identifier type="ISSN">0040-6031</identifier>
<identifier type="PII">S0040-6031(00)X0045-7</identifier>
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<date>19971022</date>
<detail type="volume">
<number>302</number>
<caption>vol.</caption>
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<detail type="issue">
<number>1–2</number>
<caption>no.</caption>
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<start>1</start>
<end>226</end>
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