Results 41 to 50 of about 35,311 (304)
Química Nova, 2021 Asphaltenes fractions were extracted and purified from three heavy Brazilian oils. Their mass compositions of C, H, N, Ni and V were obtained from elemental analysis and S and O atomic percentages from EDS.
Hemmely Guilhermond de Souza Severino +5 more
doaj +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
مجلة بغداد للعلوم, 2014 This study is a complementary one to an extended series of research work that aims to produce a thermodynamiclly stable asphalt –sulfur blend. Asphalt was physically modified wiht different percentages of asphaltenes , oxidized asphaltenes and then ...
Baghdad Science Journal
doaj +1 more source
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
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
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
Thermal Conversion of Heavy Oil Systems and Analysis of Structural Changes of their High Components with PMR Method [PDF]
, 2014 Heavy oil systems are thermolyzed with different ratios of amount of resins and asphaltenes: 3.4, 3.8, 5.3, and 12.4. The change in yield and composition of gaseous, liquid and solid products of thermolysis is shown depending on the ratio of the resin ...
Golovko, A. K. +3 more
core +1 more source
Scientific Reports, 2019 Understanding of possible molecular interactions at liquid-liquid and solid-liquid interfaces can shed lights onto the nature’s design and authorise fine manipulation aptitude in biological, manufacturing, microfluidic and oil recovery applications.
E. Joonaki +3 more
semanticscholar +1 more source
Medium dependence of asphaltene agglomeration inhibitor efficiency
, 2007 Applying chemical additives (molecule inhibitors or dispersants) is one of the common ways to control asphaltene agglomeration and precipitation. However, it is not clear why at some conditions the synthetic flocculation inhibitors as well as resins not ...
Barcenas, Mariana +4 more
core +1 more source
Examining Asphaltene Solubility on Deposition in Model Porous Media [PDF]
, 2016 Asphaltenes are known to cause severe flow assurance problems in the near-wellbore region of oil reservoirs. Understanding the mechanism of asphaltene deposition in porous media is of great significance for the development of accurate numerical ...
Biswal, S. L. +8 more
core +1 more source