Results 151 to 160 of about 18,552 (210)
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Effect of Asphaltenes on the Structure and Surface Properties of Wax Crystals in Waxy Oils
Energy & Fuels, 2019Asphaltenes, as the most polar component of crude oils, may interact with wax molecules during the wax crystallization, thus changing wax precipitation characteristics and wax crystal structure and affecting the gelation behavior of crude oils.
Huiyong Xue +5 more
semanticscholar +1 more source
Dissolution and suspension of asphaltenes with ionic liquids
Fuel, 2019Asphaltenes, which comprise polycyclic aromatic hydrocarbon cores with attached short aliphatic side chains, are the most polar fraction of crude oils.
C. Zheng +4 more
semanticscholar +1 more source
The influence of CO2 on the structure of confined asphaltenes in calcite nanopores
Fuel, 2019The effect of CO2 injection on the structure and transport properties of confined asphaltenes in 6 nm slit-shaped calcite nanopore was studied using molecular dynamics simulations. The difference between asphaltene behavior in confined and bulk fluids in
S. Mohammed, G. Gadikota
semanticscholar +1 more source
Journal of Molecular Liquids, 2019
The structure and transport of the heavy asphaltene molecules in unconfined bulk fluids and fluids confined in a 4 nm slit-shaped nanopores of calcite and silica were studied using classical molecular dynamics simulations. The pores were filled with 7 wt%
S. Mohammed, G. Gadikota
semanticscholar +1 more source
The structure and transport of the heavy asphaltene molecules in unconfined bulk fluids and fluids confined in a 4 nm slit-shaped nanopores of calcite and silica were studied using classical molecular dynamics simulations. The pores were filled with 7 wt%
S. Mohammed, G. Gadikota
semanticscholar +1 more source
Journal of Colloid and Interface Science, 2019
Emulsions stabilized with asphaltenes are undesirable in oil production due to the challenges associated with fouling, corrosion and environment contaminations. To understand the stabilization mechanism, the interfacial behavior and interaction mechanism
Lei Xie +5 more
semanticscholar +1 more source
Emulsions stabilized with asphaltenes are undesirable in oil production due to the challenges associated with fouling, corrosion and environment contaminations. To understand the stabilization mechanism, the interfacial behavior and interaction mechanism
Lei Xie +5 more
semanticscholar +1 more source
Applied Thermal Engineering, 2019
Fouling in crude preheat trains is a major cause of thermal inefficiency in petroleum refineries. The limited fundamental understanding of its causes and mechanisms led to ineffective fouling mitigation techniques.
Sampath Emani, M. Ramasamy, K. Shaari
semanticscholar +1 more source
Fouling in crude preheat trains is a major cause of thermal inefficiency in petroleum refineries. The limited fundamental understanding of its causes and mechanisms led to ineffective fouling mitigation techniques.
Sampath Emani, M. Ramasamy, K. Shaari
semanticscholar +1 more source
Solution Properties of Asphaltenes
Langmuir, 2008Ultracentrifugation 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 +2 more
openaire +2 more sources
On the molecular basis of aggregation and stability of Colombian asphaltenes and their subfractions
Fuel, 2019Vacuum residue (VR) is the heaviest fraction obtained by fractional distillation of the crude oil. Crude oil and its fractions, such as VR, can be separated in its components saturates, aromatics, resins, and asphaltenes (SARA fractions). Asphaltenes are
Lina R. Morantes +2 more
semanticscholar +1 more source
Mitigation of asphaltenes precipitation phenomenon via chemical inhibitors
Journal of Petroleum Science and Engineering, 2019The main aim of this study is to mitigate asphaltenes precipitation phenomenon using chemical inhibitors under reservoir conditions. Different conventional screening test methods such as UV-Vis and solids detection system (SDS) equipped with a low ...
E. Ghloum +4 more
semanticscholar +1 more source
Journal of Petroleum Science and Engineering, 2019
Asphaltenes precipitation, flocculation, and deposition may cause severe damages to reservoirs, wells, and production facilities. Asphaltenes precipitation may occur during all production stages, e.g., primary depletion, acidizing jobs, and the injection
Hessah Alrashidi +2 more
semanticscholar +1 more source
Asphaltenes precipitation, flocculation, and deposition may cause severe damages to reservoirs, wells, and production facilities. Asphaltenes precipitation may occur during all production stages, e.g., primary depletion, acidizing jobs, and the injection
Hessah Alrashidi +2 more
semanticscholar +1 more source