Dynamic rheological analysis of the gelation behaviour of waxy crude oils

被引：0
|
作者：
José A. Lopes da Silva
João A. P. Coutinho
机构：
[1] University of Aveiro,Department of Chemistry
[2] University of Aveiro,CICECO, Department of Chemistry
来源：
Rheologica Acta | 2004年 / 43卷
关键词：
Waxy crude oils; Viscoelastic behaviour; Gelation; Fractal aggregates;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this work we have characterised the viscoelastic behaviour of paraffin crystals in three different complex crude oils, close to the gelation threshold and after curing the gels under quiescent isothermal conditions, by means of oscillatory shear measurements. An increase in gelation temperature is observed with increasing oil’s molecular weight. The interactions between wax crystals and the formation of the space-filling network of interlocking wax crystals are thus facilitated by the presence of paraffins with higher molecular weight. The apparent gelation time, obtained from isothermal curing experiments, decreases as the curing temperature was decreased, and it is highly temperature-dependent.
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页码：433 / 441
页数：8
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