The composition and thermal properties of waxes in oil asphaltenes

被引：0
作者：
Yu. M. Ganeeva
T. N. Yusupova
G. V. Romanov
A. T. Gubaidullin
A. I. Samigullina
机构：
[1] Russian Academy of Sciences,A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center
[2] Kazan Federal University,Institute of Geology and Petroleum Technology
来源：
Journal of Thermal Analysis and Calorimetry | 2015年 / 122卷
关键词：
Asphaltenes; Waxes; Hydrocarbon composition; Calorimetry; Gas chromatography; Crystalline phase;
D O I：
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中图分类号：
学科分类号：
摘要：
Asphaltenes of four Russian and Kyrgyzstan crude oils were investigated with calorimetry, gas chromatography and X-ray diffraction analysis. It was established that asphaltenes contain waxes. Hydrocarbon composition and the thermal properties of waxes co-precipitated with asphaltenes and isolated by acetone from crudes oils according to the EN 12606-2 method were determined and compared. It was found that n-alkanes C40+ dominate in the waxes co-precipitated with asphaltenes. Waxes in asphaltenes are characterized by high temperature and enthalpy of melting/crystallization. Co-precipitation of high molecular weight waxes with asphaltenes is necessary to consider in order to determine the actual content and composition of asphaltenes and total content and composition of waxes in crude oil more accurately.
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页码：1365 / 1373
页数：8
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