کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10273277 | 461254 | 2005 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bifurcated correlations of the properties of crude oils with their asphaltene content
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Asphaltene-based correlations of crude oil properties were analysed for more than 390 recovered (dead) crudes from a new database of the oils of the former USSR, as well as from databases by other authors. For densities, viscosities and pour points the analysis revealed a definite absence of frequently quoted strong linear correlations with asphaltene content and a persistent occurrence of non-linear anomalies for oils with â2.5-3 wt.% asphaltenes. As shown by selective filtering of databases, these anomalies most probably are due to the existence of two distinct types of world's crude oils, as classified with respect to their asphaltene-based correlations. Two separate branches also are observed in most correlations for SARA components, for contents of N, S, O, V and Ni. The analysed correlations show definite imprints of biodegradation and of source types. However, a review of various oil alteration processes shows that an apparent subdivision of crudes into two types is most probably due to deasphalting via a natural geochromatography of oils in course of migration, resulting in a selective removal of a well-defined polar asphaltene fraction, distinguished by its low solubility.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 84, Issue 1, January 2005, Pages 13-28
Journal: Fuel - Volume 84, Issue 1, January 2005, Pages 13-28
نویسندگان
Igor N. Evdokimov,