Journal ArticleDOI
Effects of asphaltene concentration and asphaltene agglomeration on viscosity
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TLDR
In this paper, the effects of asphaltene concentration and agglomeration on viscosity of crude oil were investigated, and the effect of temperature on viscoverage reduction is more significant at higher asphalte concentration.About:
This article is published in Fuel.The article was published on 2019-11-01. It has received 38 citations till now. The article focuses on the topics: Asphaltene & Viscosity.read more
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Effect of enhanced oil recovery on the composition and rheological properties of heavy crude oil
TL;DR: In this paper, the composition and rheological properties of 10 samples of heavy crude oil from five different wells were investigated before and after integrated oilfield treatment with gel-forming and oil-displacing systems for increasing oil recovery.
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Effect of the heteroatom presence in different positions of the model asphaltene structure on the self-aggregation: MD and DFT study
TL;DR: In this article, a series of heteroatoms including nitrogen, oxygen, and sulfur were added to different positions of the model asphaltene structure to study the effect of the heteroatom presence in the selfaggregation of the models.
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Microscopic analysis of the evolution of asphalt colloidal properties and rejuvenation behavior in aged asphalt
TL;DR: In this paper , the authors investigate the evolution of aged asphalt colloids from a microscopic perspective using molecular simulation and show that aging enhances the strength and density of asphaltene aggregates and also contributes to forming stable rejuvenated configurations.
Journal ArticleDOI
Impact of Functional Group Methylation on the Disaggregation Trend of Asphaltene: A Combined Experimental and Theoretical Study
He Bian,He Bian,Aiting Kan,Zhilin Yao,Zunbin Duan,Huiming Zhang,Huiming Zhang,Shiguo Zhang,Lijun Zhu,Daohong Xia +9 more
TL;DR: In this paper, it was shown that asphaltenes have a tendency toward aggregation, leading to a series of problems (e.g., coking) in the field of refining or other oil utilization and making the development of a disaggregation metho...
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Experimental study on viscosity reduction of heavy oil with water content by synergistic effect of microwave and nano-catalyst
TL;DR: In this article, the authors studied the viscosity reduction of nano-catalyst and microwave treatment of heavy oil in different water content, and the experimental results showed that the maximum viscoity reduction was 96.81% when the water content was 50-wt% under the conditions of microwave heating power of 614w, microwave heating temperature of 68-°C and nickel nano-calyst concentration of 0.8
References
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Journal ArticleDOI
A Mechanism for Non‐Newtonian Flow in Suspensions of Rigid Spheres
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The effect of Brownian motion on the bulk stress in a suspension of spherical particles
TL;DR: In this article, the effect of Brownian motion on the probability density of the separation vector of rigid spherical particles in a dilute suspension is investigated and an explicit expression for this leading approximation is constructed in terms of hydrodynamic interactions between pairs of particles.
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The viscosity of a concentrated suspension of spherical particles
TL;DR: In this paper, the authors extended the viscosity equation for an infinitely dilute suspension of spheres to apply to a suspension of finite concentration, and made use of a functional equation which must be satisfied if the final viscosities is independent of the sequence of stepwise additions of partial volume fractions of the spheres to the suspension.
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Heavy crude oil viscosity reduction and rheology for pipeline transportation
TL;DR: In this paper, different methods of reducing the viscosity of heavy crude oil to enhance the flow properties were investigated using RheoStress RS100 from Haake, and the results showed that the blending of the heavy crude oils with a limited amount of lighter crude oils provided better performance than the other alternatives.
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Viscosity/Concentration Relationships for Emulsions
Rajinder Pal,E. Rhodes +1 more
TL;DR: In this article, the authors developed equations to describe the viscosity/concentration behavior of Newtonian and non-Newtonian emulsions having dispersed phase concentrations less than 74% by volume.