Scientific Reports, 2023 Asphaltene precipitation and its adsorption on different surfaces are challenging topics in the upstream and downstream of the oil industries and the environment.
Sajjad Ansari +6 more
doaj +1 more source
Determination of Asphaltene Critical Nanoaggregate Concentration Region Using Ultrasound Velocity Measurements [PDF]
Scientific Reports 7, 16125 (2017), 2017 Asphaltenes constitute the heaviest, most polar and aromatic fraction of petroleum crucial to the formation of highly-stable water- in-crude oil emulsions. The latter occur during crude oil production as well as spills and cause difficulties to efficient remediation practice.
arxiv +1 more source
Influence of dispersing additive on asphaltenes aggregation in model system [PDF]
, 2016 The work is devoted to investigation of the dispersing additive influence on asphaltenes aggregation in the asphaltenes-toluene-heptane model system by photon correlation spectroscopy method.
Ges, G. A. +4 more
core +1 more source
Review of microscale dynamics of dilution-induced asphaltene precipitation under controlled mixing conditions [PDF]
arXiv, 2022 As the most complex and heaviest component in bitumen, asphaltene precipitation induced by solvent dilution is important in oil sands extraction to remove solids and water from bitumen froth through dilution by paraffinic solvents. This review will compare asphaltene precipitation to dilution-induced solvent shifting in aqueous systems via the ouzo ...
arxiv
Oil & Gas Science and Technology, 2016 Asphaltenes are shown to be amphoteric, containing acidic and basic species that can ionize at low and high pH respectively when they come in contact with water.
Hutin Anthony +2 more
doaj +1 more source
A multiscale method for simulating fluid interfaces covered with large molecules such as asphaltenes [PDF]
J. Comput. Phys. (2016), vol 327, pp. 576-611, 2018 (Abbreviated) In this paper we report on the development of a multiscale method for simulating complex liquid-liquid systems such as water in contact with oil containing asphaltenes. We consider simulations where water drops covered with asphaltenes are deflated, and reproduce the crumpling observed in experiments.
arxiv +1 more source
Time-Dependent Physicochemical Changes of Carbonate Surfaces from SmartWater (Diluted Seawater) Flooding Processes for Improved Oil Recovery. [PDF]
, 2018 Over the past few decades, field- and laboratory-scale studies have shown enhancements in oil recovery when reservoirs, which contain high-salinity formation water (FW), are waterflooded with modified-salinity salt water (widely referred to as the low ...
Alotaibi, Mohammed B +12 more
core +3 more sources
Cooee bitumen II: Stability of linear asphaltene nanoaggregates [PDF]
J. Chem. Phys. 141, 144308 (2014), 2014 Asphaltene and smaller aromatic molecules tend to form linear nanoaggregates in bitumen.Over the years bitumen undergoes chemical aging and during this process, the size of the nanoaggregate increases. This increase is associated with an increase in viscosity and brittleness of the bitumen, eventually leading to road deterioration.
arxiv +1 more source
Understanding mechanisms of asphaltene adsorption from organic solvent on mica [PDF]
, 2014 The adsorption process of asphaltene onto molecularly smooth mica surfaces from toluene solutions of various concentrations (0.01-1 wt %) was studied using a surface forces apparatus (SFA).
Abudu A. +65 more
core +1 more source
Asphaltene aggregation onset during high-salinity waterflooding of reservoirs (a molecular dynamic study) [PDF]
, 2019 The primary objective of this study is to establish an understanding of the role of high-salinity brine on the intensity of asphaltene aggregation onset during waterflooding of petroleum reservoirs. We already have shown that asphaltenes have a high tendency to form aggregates during waterflooding process when pure- and low salinity-water are injected ...
arxiv +1 more source