Results 191 to 200 of about 24,626 (266)

Methods for determining asphaltene stability in crude oils

Fuel, 2017
Jorge Ancheyta
exaly   +2 more sources

Investigating Change of Polydispersity and Rheology of Crude Oil and Bitumen Due to Asphaltene Oxidation

, 2020
This paper examines the effect of oxidation of asphaltene molecules on the overall polydispersity and rheology of a bituminous matrix.
Daniel J. Oldham, X. Qu, Hainian Wang, E. Fini   +3 more
semanticscholar   +1 more source

Advances in Asphaltene Petroleomics. Part 4. Compositional Trends of Solubility Subfractions Reveal that Polyfunctional Oxygen-Containing Compounds Drive Asphaltene Chemistry

, 2020
Asphaltenes have traditionally been conceived as highly aromatic, alkyl-deficient compounds enriched in pericondensed aromatic “island” motifs.
M. Chacón-Patiño, Donald F. Smith, C. Hendrickson, A. Marshall, R. Rodgers   +4 more
semanticscholar   +1 more source

Non-Covalent π-Stacking Interactions between Asphaltene and Porphyrin in Bitumen

Journal of Chemical Information and Modeling, 2020
In recent years, the dominant organizing role of non-covalent π-stacking interactions in the association of asphaltenes and porphyrins has been criticized and replaced with cooperative forces that are mostly covalent in nature.
M. Mousavi, E. Fini
semanticscholar   +1 more source

A comparative study for evaluating the performance of five coatings applied on Fe3O4 nanoparticles for inhibition of asphaltene precipitation from crude oil

Journal of Dispersion Science and Technology, 2020
In this study, potential of Graphene oxide (GO), Silica (SiO2) and Chitosan coatings on Fe3O4 magnetic nanoparticles was investigated for asphaltene adsorption.
N. Setoodeh, P. Darvishi, Asghar Lashanizadegan, F. Esmaeilzadeh   +3 more
semanticscholar   +1 more source

Asphaltene Cake Properties

Energy & Fuels, 2008
One of the major problems encountered during the exploitation of the oil reservoir is the deposition of asphaltene in the porous rock near the wellbore. The crude oil asphaltene considerably reduces the rock permeability and, consequently, the oil production.
Montel, Valérie, Lazzeri Pordoy, Véronique, Brocart, B., Zhou, Honggang   +3 more
openaire   +2 more sources

The Asphaltenes

Annual Review of Analytical Chemistry, 2011
Asphaltenes, the most aromatic of the heaviest components of crude oil, are critical to all aspects of petroleum utilization, including reservoir characterization, production, transportation, refining, upgrading, paving, and coating materials. The asphaltenes, which are solid, have or impart crucial and often deleterious attributes in fluids such as ...
openaire   +2 more sources

Novel Polyether for Efficient Demulsification of Interfacially Active Asphaltene-Stabilized Water-in-Oil Emulsions

, 2020
The interfacially active asphaltenes (IAA, 1.75 wt % of the total asphaltenes) from Indonesian asphalt rocks have been proven to be the major component in stabilizing the water-in-oil (W/O) emulsio...
Xingang Li, Jun Ma, R. Bian, Jing Cheng, H. Sui, Lin He   +5 more
semanticscholar   +1 more source

Effect of Asphaltene Polarity on Wax Precipitation and Deposition Characteristics of Waxy Oils

Energy & Fuels, 2019
Asphaltenes are natural pour point depressants, and the effect of asphaltene polarity on the low-temperature rheology of waxy oils has been well studied.
Chuanxian Li, Haoran Zhu, Fei Yang, Hongye Liu, Feng Wang, Guangyu Sun, Bo Yao   +6 more
semanticscholar   +1 more source

Solution Properties of Asphaltenes

Langmuir, 2008
Ultracentrifugation has been used to produce asphaltene fractions of reduced polydispersity. The structure of these asphaltene fraction solutions has been investigated using viscosity and X-ray scattering (SAXS) measurements as a function of concentration.
Loïc, Barré, Sébastien, Simon, Thierry, Palermo   +2 more
openaire   +2 more sources