Results 71 to 80 of about 35,311 (304)

Asphaltenes and preasphaltenes from coal liquid extracts: feedstocks to obtain carbon mesophase

Revista Facultad de Ingeniería Universidad de Antioquia, 2014
The aim of this work was to produce mesophase by using preasphaltenes and asphaltenes from coal liquid extracts obtained in a Direct Coal Liquefaction (DCL)  process.
Juan Barraza, Natalia Muñoz, Lina Barona   +2 more
doaj   +1 more source

OBTAINING CARBON GRAPHITE-LIKE NANOMATERIALS IN ASPHALTENE-BASED WASTE RECYCLING

Известия Томского политехнического университета: Инжиниринг георесурсов, 2022
The relevance of the study is caused by the increasing consumption of petroleum products and increasing amount of oil waste, which contains asphaltenes, the heaviest components of oil. Asphaltenes are poorly biodegradable.
Alexander Ya. Pak, Pavel V. Povalyaev, Evgeniya V. Franzina, Andrey A. Grinko, Yuliya Yu. Petrova, Valentina V. Arkachenkova   +5 more
doaj   +1 more source

Resonance‐induced restoration of rock permeability degraded by heavy components of crude oil

Deep Underground Science and Engineering, EarlyView.
Resonance‐induced changes occur in filtration properties of sedimentary rocks in crude paraffin oil flow under acoustic vibrations. Experimental data on (a) pressure drop; (b) permeability; (c) pressure at the rock inlet; and (d) pressure at the rock outlet are presented.
Evgenii Riabokon, Qian Yin, Mikhail Guzev, Mikhail Turbakov, Evgenii Kozhevnikov, Nadezhda Riabokon, Ivan Panteleev   +6 more
wiley   +1 more source

Investigation of the fluid behavior of asphaltenes and toluene insolubles by high-temperature proton nuclear magnetic resonance and rheometry and their application to visbreaking [PDF]

, 2016
The fluid behavior of asphaltenes at elevated temperatures impacts coke formation in a number of hydrocarbon conversion processes, including visbreaking and delayed coking. In this study, the asphaltenes from a number of sources, namely, a vacuum residue,
Barker, James, Castro-Díaz, M., Cheeseman, Barry, Snape, C.E., Uguna, Clement N.   +4 more
core   +3 more sources

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

Deep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand, Ang Li, Wenbo Huang, Juanwen Chen, Qingshan Ma, Fangming Jiang   +5 more
wiley   +1 more source

Application of the UNIFAC Model for the Low-Sulfur Residue Marine Fuel Asphaltenes Solubility Calculation

Journal of Marine Science and Engineering, 2022
Since 2020, 0.5% limits on the sulfur content of marine fuels have been in effect worldwide. One way to achieve this value is to mix the residual sulfur and distillate low sulfur components.
Vladimir G. Povarov, Ignaty Efimov, Ksenia I. Smyshlyaeva, Viacheslav A. Rudko   +3 more
doaj   +1 more source

Study of asphaltene dispersion and removal for high-asphaltene oil wells [PDF]

Petroleum Science, 2012
Many wellbores are blocked by asphaltene deposits, which lead to production problems in the oilfield development process. In this paper, methods such as elemental analysis, and solvent extraction are adopted for the study of wellbore blockages. The content of organic matter in blockages is higher than 96% and asphaltene is the main component of the ...
Qingzhe Jiang, Jixiang Guo, Chaogang Chen, Na An, Na An, Yangqiu Pan, Yaguang Li   +6 more
openaire   +2 more sources

Pre‐treatment with extraction solvent yields higher recovery: Method optimization for efficient determination of polycyclic aromatic hydrocarbons in organic‐rich fine‐textured wastes

Journal of Environmental Quality, EarlyView.
Abstract Fluid fine tailings (FFT) contain numerous organic compounds, including polycyclic aromatic hydrocarbons (PAHs). Growing concerns of PAH toxicity warrants monitoring for environmental consequences and natural attenuation. Conventional Soxhlet extraction yields low (∼50%–60%) recovery of PAHs (naphthalene, phenanthrene, pyrene, dibenzofuran ...
Henian Guo, Najmeh Samadi, Maryam Firoozbakht, Alsu Kuznetsova, Tariq Siddique   +4 more
wiley   +1 more source

Extracting the equation of state of lattice gases from Random Sequential Adsorption simulations by means of the Gibbs adsorption isotherm

, 2017
A novel approach for deriving the equation of state for a 2D lattice gas is proposed, based on arguments similar to those used in the derivation of the Langmuir-Szyszkowski equation of state for localized adsorption.
Darjani, Shaghayegh, Koplik, Joel, Pauchard, Vincent   +2 more
core   +1 more source

Composition of Pre-ozonated High-Sulfur Natural Bitumen Cracking Products [PDF]

, 2015
The results analysis of fractional and material composition of the cracking products of Ashalchinskoye and Karmalskoye bitumen deposits was presented in this work.
Dombrovskaya, A. S., Golovko, A. K., Krivtsov, E. B., Krivtsova, Nadezhda Igorevna, Sviridenko, N. N.   +4 more
core   +1 more source