Journal ArticleDOI
Asphalt flocculation and deposition iv. dynamic evolution of the heavy organic compounds
Mehrdad Mozaffarian,Bahram Dabir,Morteza Sohrabi,Hossein Rassamdana,Hossein Rassamdana,Muhammad Sahimi +5 more
TLDR
In this article, the dynamics of formation of asphalt and asphaltene aggregates are studied, and three different characteristics of the aggregates and their time evolution are compared, namely their precipitation, small-angle scattering, and molecular weight distributions.About:
This article is published in Fuel.The article was published on 1997-11-01. It has received 30 citations till now. The article focuses on the topics: Asphaltene & Flocculation.read more
Citations
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Journal ArticleDOI
Asphaltene Adsorption onto Alumina Nanoparticles: Kinetics and Thermodynamic Studies
TL;DR: In this article, the adsorption of asphaltenes from heavy oil model solutions onto colloidal nanoparticles of γ-Al2O3 is investigated, and the effects of the following variables on the amount of adsorbed have been investigated, namely, contact time, initial concentration of Asphtenes, temperature, heptane/toluene ratio (H/T), coexisting molecules, and water content.
Journal ArticleDOI
Measurement and prediction of the rate of deposition of flocculated asphaltene particles from oil
Mohammad Jamialahmadi,B. Soltani,Hans Müller-Steinhagen,Hans Müller-Steinhagen,D. Rashtchian +4 more
TL;DR: In this article, the authors studied the mechanisms of deposition of flocculated asphaltene particles from oil using an accurate thermal approach and developed a mechanistic model for the prediction of the deposition process under forced convective conditions.
Journal ArticleDOI
Assembly of asphaltene molecular aggregates as studied by near-UV/visible spectroscopy: I. Structure of the absorbance spectrum
TL;DR: In this paper, the shape of the optical absorption spectrum was found to be sensitive to the details of asphaltene aggregation processes in dilute solutions of crude oils and of solid Asphaltenes.
Journal ArticleDOI
Visualization of asphaltene precipitation and deposition in a uniformly patterned glass micromodel
TL;DR: In this paper, the authors investigated the process of precipitation and deposition of asphaltene in a uniformly patterned glass micromodel, which was carried out by the injection of n-heptane while setting the other operating conditions, such as temperature, pressure and flow rate unchanged.
Journal ArticleDOI
Assembly of asphaltene molecular aggregates as studied by near-UV/visible spectroscopy: II. Concentration dependencies of absorptivities
TL;DR: In this paper, the properties of molecular aggregation in toluene solutions of a crude oil and solid asphaltenes are determined almost solely by the concentration of asphalte, as shown by absorptivity measurements at 315-750 nm.
References
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Book
Phase Transitions and Critical Phenomena
TL;DR: The field of phase transitions and critical phenomena continues to be active in research, producing a steady stream of interesting and fruitful results as discussed by the authors, and the major aim of this serial is to provide review articles that can serve as standard references for research workers in the field.
Journal ArticleDOI
Diffusion-limited aggregation, a kinetic critical phenomenon
Abstract: A model for random aggregates is studied by computer simulation The model is applicable to a metal-particle aggregation process whose correlations have been measured previously Density correlations within the model aggregates fall off with distance with a fractional power law, like those of the metal aggregates The radius of gyration of the model aggregates has power-law behavior The model is a limit of a model of dendritic growth
Book
The Chemistry and Technology of Petroleum
TL;DR: In this paper, Asphaltene used the data of the Data Structural Group Analysis (DSGAA) to determine the effect of various factors on the stability or instability of the Crude Oil System.
Journal ArticleDOI
Formation of fractal clusters and networks by irreversible diffusion-limited aggregation
TL;DR: A model for diffusion-controlled aggregation in which growing clusters as well as individual particles are mobile has been investigated in this article, and two versions of the model in which the cluster diffusion coefficient is either size independent or inversely proportional to number of particles (mass) give very similar results.
Journal ArticleDOI
Scaling of Kinetically Growing Clusters
M. Kolb,Robert Botet,R. Jullien +2 more
TL;DR: In this article, a modele decrivant le processus de croissance de amas par agregation d'amas is introduced, which is based on the methode de Monte Carlo.