Table of Contents
ISRN Analytical Chemistry
Volume 2012, Article ID 219276, 6 pages
Research Article

Correlations between SARA Fractions, Density, and RI to Investigate the Stability of Asphaltene

Department of Petroleum Engineering, Petroleum University of Technology, P.O. Box 63431, Ahwaz, Iran

Received 24 September 2011; Accepted 24 October 2011

Academic Editors: T. C. Dinadayalane, A. M. Farag, and N. Fujita

Copyright © 2012 Ali Chamkalani. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Asphaltene precipitation is one of the most common problems in both oil recovery and refinery processes. Its deposition causes many problems mainly because of the fuzzy nature of asphaltene and the large number of parameters affecting precipitation. Unfortunately there is not a predictive technique for screening it. Refractive index (RI) was used as a stability test for asphaltene which makes a quantitative judgment for asphaltene stability. In our study, we first represent a novel correlation between SARA fractions and density and then demonstrate the relation between density and RI; second we developed a relation for SARA and RI, by utilizing RI to investigate the stability of asphaltene.