Results 21 to 30 of about 35,311 (304)

High-Field (3.4 T) Electron Paramagnetic Resonance, ¹H Electron-Nuclear Double Resonance, ESEEM, HYSCORE, and Relaxation Studies of Asphaltene Solubility Fractions of Bitumen for Structural Characterization of Intrinsic Carbon-Centered Radicals

Nanomaterials, 2022
Petroleum asphaltenes are considered the most irritating components of various oil systems, complicating the extraction, transportation, and processing of hydrocarbons. Despite the fact that the paramagnetic properties of asphaltenes and their aggregates
Marat Gafurov, Yulia Ganeeva, Tatyana Yusupova, Fadis Murzakhanov, Georgy Mamin   +4 more
doaj   +1 more source

Asphaltene Precipitation/Deposition Estimation and Inhibition through Nanotechnology: A Comprehensive Review

Energies, 2023
Asphaltene precipitation/deposition is considered a problem of formation damage, which can reduce the oil recovery factor. In addition, asphaltenes can be deposited in pipelines and surface installations, causing serious complications in guaranteeing ...
Camilo Andrés Guerrero-Martin, Daniel Montes-Pinzon, Mariana Meneses Motta da Silva, Erik Montes-Paez, Laura Estefanía Guerrero-Martin, Raúl Salinas-Silva, Stefanny Camacho-Galindo, Elizabete Fernandes Lucas, Alexandre Szklo   +8 more
doaj   +1 more source

Mechanical Properties of the Blends of Recycled Polypropylene with Blown and Soft Bitumens [PDF]

علوم و تکنولوژی پلیمر, 2008
In this investigation, the mechanical properties of the blends of blown bitumen110/10, heavy vacuum slops (H.V.S), bitumen 60/70 penetration grade and isotactic polypropylene (iPP) were studied for the first time.
V. Hadadi, A.A. Yousefi, M.T. Ganji, M. Khosravi   +3 more
doaj   +1 more source

EVALUATION OF AN HPHT UNIT COUPLED WITH NIR PROBE TO DETERMINE ASPHALTENES PRECIPITATION ONSET UNDER DIFFERENT PRESSURES

Revista Fuentes El Reventón Energético, 2023
Asphaltenes are characterized as the crude oil fraction with the highest molar mass and polarity, presetting mainly (poly) aromatic groups. The flocculation and deposition of asphaltenes causes large losses to the oil industry.
Daniel Rezende da Silva, João Pedro Dias Capuchinho, Edilson Domingos da Silva, Daniela Hartmann, Marcia Cristina Khalil de Oliveira, Elizabete Fernandes Lucas   +5 more
doaj   +1 more source

Method for Judging the Stability of Asphaltenes in Crude Oil

ACS Omega, 2020
The colloidal instability index (CII) has been widely used for testing the stability of asphaltenes as a classical method. In this study, five oil samples were tested by the CII method; the results obtained greatly differ from the real field results.
R. Xiong, Jixiang Guo, Wyclif Kiyingi, Hengshui Feng, T. Sun, Xiaohui Yang, Qing Li   +6 more
semanticscholar   +1 more source

Characterization of the Structure of Saudi Crude Asphaltenes by X-ray Diffraction [PDF]

, 1997
Structural characterization studies have been carried out on four commercial Saudi Arabian crude oils. The aromaticity and crystallite parameters of the asphaltenes were studied by X-ray diffraction methods and compared to the average structural ...
Ali, Mohammad F., Shirokoff, John W., Siddiqui, Mohammad N.   +2 more
core   +4 more sources

Molecular Characterization of Strongly and Weakly Interfacially Active Asphaltenes by High-Resolution Mass Spectrometry

Energy & Fuels, 2020
Asphaltenes are a complex mixture of molecular structures with a variety of functionalities, which in turn impacts their physical properties.
D. A. Ballard, M. Chacón-Patiño, P. Qiao, K. Roberts, R. Rae, P. Dowding, Zhenghe Xu, D. Harbottle   +7 more
semanticscholar   +1 more source

Bitumen and asphaltene derived nanoporous carbon and nickel oxide/carbon composites for supercapacitor electrodes

Scientific Reports, 2022
Asphaltenes from bitumen are abundant resource to be transformed into carbon as promising supercapacitor electrodes, while there is a lack of understanding the impact from different fractions of bitumen and asphaltenes, as well as the presence of ...
Dinesh Mishra, Rufan Zhou, Md. Mehadi Hassan, Jinguang Hu, Ian Gates, Nader Mahinpey, Qingye Lu   +6 more
doaj   +1 more source

Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity

Dyna, 2016
This study aims to evaluate the effect of surface acidity of fumed silica nanoparticles in adsorption and subsequent thermal cracking of Colombian asphaltenes.
Camilo Andrés Franco-Ariza, Juan David Guzmán-Calle, Farid B. Cortés   +2 more
doaj   +1 more source

Thermodynamics of the deposition of complex waxes and asphaltenes in crude oil [PDF]

, 2009
Peer reviewedPublisher ...
Ball, Rowena, Jones, John C
core   +1 more source