A study of the heavy fractions and residues from West Siberian crude oil by thermogravimetric and differential thermal analysis techniques |
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Authors: | V. Penchev M. Stojanova |
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Affiliation: | (1) Institute of Organic Chemistry, Bulgarian Academy of Sciences, 1040 Sofia, Bulgaria |
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Abstract: | A method for comparing the thermochemical properties of high- boiling fractions and residues has been developed. The thermal effects vary in intensity and range, depending on the fractional and structure group compositions of the studied samples. Good agreement between DTA and TG data is observed. The thermal analysis of samples, obtained by liquid adsorption chromatography, reveals the specific differences of the individual structure group fractions in the processes of evaporation, thermal decomposition and coke formation. The observed effects are interpreted from the point of view of the different thermal stabilities and reactivities of the compounds contained in the Chromatographic fractions. The results show that the TG-DTA method allows the quick determination of some characteristics depending on the group compositions of the high-boiling fractions and residues from West Siberian crude oiL.
Zusammenfassung Ein Verfahren zum Vergleich der thermochemischen Eigenschaften von schwersiedenden Fraktionen und Rückständen wurde entwickelt. Die thermischen Effekte unterscheiden sich in Intensität und Bereich des Auftretens, immer abhängig von der chemischen und strukturellen Zusammensetzung der Proben. Zwischen DTA- und TG-Daten konnte gute Übereinstimmung beobachtet werden. Die Thermoanalyse der durch Adsorptionsflüssigkeitschromatographie erhaltenen Proben offenbart die spezifischen Unterschiede der einzelnen strukturellen Fraktionen während des Verdampfungs-, thermischen Zersetzungs- und Verkokungsprozesses. Die beobachteten Effekte wurden unter Gesichtspunkten der unterschiedlichen thermischen Stabilität und Reaktivität der aus den chromatographischen Fraktionen gewonnenen Verbindungen diskutiert. Die Ergebnisse zeigen, dass das TG-DTA-Verfahren eine schnelle Bestimmung einiger von der funktionellen Gruppenzusammensetzung abhängigen Eigenschaften schwersiedender Fraktionen und Rückstände aus westsibirischem Rohöl ermöglicht.
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![dcy](/content/k74360q71265t145/xxlarge1076.gif) ![ncy](/content/k74360q71265t145/xxlarge1085.gif) -![scy](/content/k74360q71265t145/xxlarge1089.gif) ![icy](/content/k74360q71265t145/xxlarge1080.gif) ![bcy](/content/k74360q71265t145/xxlarge1073.gif) ![icy](/content/k74360q71265t145/xxlarge1080.gif) ![rcy](/content/k74360q71265t145/xxlarge1088.gif) ![scy](/content/k74360q71265t145/xxlarge1089.gif) ![kcy](/content/k74360q71265t145/xxlarge1082.gif) ![ocy](/content/k74360q71265t145/xxlarge1086.gif) ![ncy](/content/k74360q71265t145/xxlarge1085.gif) ![iecy](/content/k74360q71265t145/xxlarge1077.gif) ![fcy](/content/k74360q71265t145/xxlarge1092.gif) .
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