Tuesday, December 16, 2014

A comprehensive study on mechanism of formation and techniques to diagnose asphaltene structure; molecular and aggregates: a review

A comprehensive study on mechanism of formation and techniques to diagnose asphaltene structure; molecular and aggregates: a review

Type
Journal Article
Author
Z. Hosseini-Dastgerdi
Author
S.a.r. Tabatabaei-Nejad
URL
Publication
Asia-Pacific Journal of Chemical Engineering
Date
2014
Abstract
Because the formation of asphaltene aggregates causes its deposition in various processes, exact determination of the molecular and aggregate structure and mechanism of aggregate formation is important. Authors review the molecular and aggregate structure of asphaltene using a variety of techniques.
They compare differingt mechanisms of aggregate formation, suggested by researchers. These mechanisms are proposed by researchers according to the molecular characteristics of asphaltene and the structure of aggregates. Researchers have considered four general models for the formation mechanism of asphaltene aggregates: the micellar/colloidal, polymeric, solubility, and modified Yen models. In comparison with other models, the modified Yen model shows more consistency with new studies, which determine the island molecular structure and small nano-aggregates for asphaltene.

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