Results 51 to 60 of about 20,919 (276)
Catagenetic trends in composition and structure parameters of asphaltenes
GeoresursyСatagenetic transformations of asphaltenes of organic matter (OM) from recent sediments and fossil rocks were studied on rocks sampled from different sedimentary basins (Timan-Pechora, Mezen, West Siberian, Kuznetsk, Aldan-Maya and Middle Amur) of Russia.
L. S. Borisova, I. D. Timoshina
doaj +1 more source
Revista Fuentes El Reventón Energético, 2017 Asphaltenes can cause serious problems to petroleum industry. Indication of asphaltenes stability can be obtained by precipitation induced by n-heptane, monitored by near-infrared (NIR).
Jeniffer N. Figueira +3 more
doaj +1 more source
Entropic patchiness drives multi-phase coexistence in discotic colloid-depletant mixtures [PDF]
Scientific Reports 7, 17058 (2017), 2017 Entropy-driven equilibrium phase behaviour of hard particle dispersions can be understood from excluded volume arguments only. While monodisperse hard spheres only exhibit a fluid-solid phase transition, anisotropic hard particles such as rods, discs, cuboids or boards exhibit various multi-phase equilibria.
arxiv +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.Synthesis of carbon‐zeolite porous composite from tailings solvent recovery units. Abstract Millions of metric tonnes of tailings solvent recovery units (TSRU) stream are produced annually by the oil sands mining industries and stored in the tailing ponds.
Umang Patel +2 more
wiley +1 more source
Pyrolysis of asphaltenes and biomarkers for the fingerprinting of the _Amoco Cadiz_ oil spill after 23 years [PDF]
, 2009 The chemical composition of the petroleum products accidently or deliberately released in the environment varies considerably with time under the action of biological (biodegradation) and physico-chemical (photo-oxidation) processes.
Fré, Jean Oudot
core +1 more source
Fractionation of Asphaltenes in Understanding Their Role in Petroleum Emulsion Stability and Fouling [PDF]
, 2017 SARA fractionation separates crude oil into fractions of saturates (S), aromatics (A), resins (R), and asphaltenes (A) based on the differences in their polarizability and polarity.
Akbarzadeh K. +10 more
core +1 more source
Fuel Communications, 2023 Injection of natural/associated gas is widely used as an efficient method of enhanced oil recovery in carbonate oil reservoirs in both miscible and immiscible conditions. Due to reservoir oil compositional changes by injected gas, asphaltenes instability
Saber Mohammadi, Fatemeh Mahmoudi Alemi
doaj
Density, viscosity, and stability of products from combinations of visbreaking and deasphalting
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Transporting bitumen through pipelines in Western Canada is cost intensive because the oil has to be diluted with light solvents to meet pipeline specifications. The diluent requirement can be reduced by visbreaking (VIS) and solvent deasphalting (SDA), each of which decrease the viscosity and density of the oil.
Jose Beleno +3 more
wiley +1 more source
Microscopic details of asphaltenes aggregation onset during waterflooding [PDF]
, 2019 We report detailed microscopic studies of asphaltenes aggregation onset during waterflooding of petroleum reservoirs. To achieve this objective, a series of simulations are performed on asphaltenic-oil miscibilized with water at high pressure and temperature through molecular dynamics.
arxiv +1 more source
Four-component united-atom model of bitumen [PDF]
J. Chem. Phys. 138 (2013) 094508, 2013 We propose a four-component molecular model of bitumen. The model includes realistic chemical constituents and introduces a coarse-graining level that suppresses the highest frequency modes. Molecular dynamics simulations of the model are being carried out using Graphic-Processor-Units based software in time spans in order of microseconds, and this ...
arxiv +1 more source