2001
DOI: 10.1364/ao.40.004028
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Light-scattering study of petroleum asphaltene aggregation

Abstract: Dynamic light scattering with an original optical scheme has been used for the investigation of opaque (strongly light-absorbing) asphaltene colloids in crude oils and hydrocarbon mixtures. Diffusion-limited aggregation and reaction-limited aggregation as well as a crossover between these two regimes have been observed. A simple interpolation for the crossover kinetics is proposed. Asphaltene colloidal structures, originally persisting in crude oils, have been detected. Addition of a precipitant above a thresh… Show more

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Cited by 58 publications
(57 citation statements)
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“…They may undergo aggregation whose kinetics is controlled by the inter-particle interaction forces. Finestein et al [25,26] and Burya et al [27] bring considerable experimental evidences supporting this view. Both groups of authors shown that asphaltene aggregation kinetics can be described according to the well known Diffusion Limited Aggregation (DLA) or Reaction Limited Aggregation (RLA) processes.…”
Section: Brief On the Previous Validation Workmentioning
confidence: 88%
“…They may undergo aggregation whose kinetics is controlled by the inter-particle interaction forces. Finestein et al [25,26] and Burya et al [27] bring considerable experimental evidences supporting this view. Both groups of authors shown that asphaltene aggregation kinetics can be described according to the well known Diffusion Limited Aggregation (DLA) or Reaction Limited Aggregation (RLA) processes.…”
Section: Brief On the Previous Validation Workmentioning
confidence: 88%
“…The above definition is in some sense arbitrary, as the molecular structure of asphaltenes varies significantly depending on their origin, method of oil recovery, Ž . and history of extraction Burya et al, 2001 . According to chemical structure, asphaltenes are aromatic multicyclic molecules surrounded and linked by aliphatic chains and heteroatoms; published molar mass data for petroleum asphaltenes range from 500 grmol to a high of 50,000 grmol Ž .…”
Section: Introductionmentioning
confidence: 99%
“…Although several recent studies have been made with the aim of understanding the flocculation phenomenon (6)(7)(8)(9)(10)(11)(12)(13)(14)(15), there is still a lack of detailed knowledge about the flocculation process of asphaltenes and how this process evolves on a molecular level. Interesting to note from these studies is that it appears as if a certain amount of flocculant is required before the asphaltenes start to aggregate (6,7,11,12).…”
Section: Introductionmentioning
confidence: 99%