Results 11 to 20 of about 20,919 (276)
Medium dependence of asphaltene agglomeration inhibitor efficiency [PDF]
Energy & Fuels vol.22, 2008, pp 1917 - 1922;, 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 only do not inhibit the asphaltene agglomeration,, they may also promote it, and why the increasing ...
Barcenas, Mariana +4 more
arxiv +3 more sources
Petroleum Asphaltenes - Part 1: Asphaltenes, Resins and the Structure of Petroleum [PDF]
Oil & Gas Science and Technology, 2004 The definition of the nonvolatile constituents of petroleum (i.e., the asphaltene constituents, the resin constituents, and, to some extent, part of the oils fraction insofar as nonvolatile oils occur in residua and other heavy feedstocks) is an operational aid. It is difficult to base such separations on chemical or structural features.
James G. Speight
openaire +3 more sources
Leveraging Non-Radiative Transitions in Asphaltenes-Derived Carbon Dots for Cancer Photothermal Therapy. [PDF]
SmallEffective solvent pretreatment of asphaltenes precursor, succeeded by acid‐based oxidation pinpointed in engineering low‐cost, biocompatible, water re‐dispersible, and scalable asphaltenes‐derived carbon dots, which convert near infrared light to heat via non‐radiative transitions to provide cancer photothermal therapy.
Akakuru OU +6 more
europepmc +2 more sources
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 +6 more
doaj +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. +2 more
core +4 more sources
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
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 +2 more
doaj +1 more source
Georesursy, 2018 NMR spectroscopy in combination with elemental analysis was used to study asphaltenes in biodegraded oils from Cenomanian pools of West Siberia. The sampling depths vary from 680 to 1800 m, formation temperatures – from 40°C to 70°C.
L.S. Borisova, E.A. Fursenko
doaj +1 more source
A Study on the Adsorption and Catalytic Oxidation of Asphaltene onto Nanoparticles [PDF]
Journal of Petroleum Science and Technology, 2017 The use of nanoparticles, including metal oxide surfaces, as asphaltene adsorbents is a potential method of removing and/or upgrading asphaltenes. The adsorption of two asphaltene types, extracted from two types of Iranian crude oil, onto nanoparticles ...
Alireza Solaimany nazar, Fatemeh Amin
doaj +1 more source
Asphaltene aggregation due to waterflooding (A molecular dynamics study) [PDF]
Yaseen, S. and Mansoori, G.A., 2018. Asphaltenes aggregation due
to waterflooding (A molecular dynamics simulation study). Journal of
Petroleum Science and Engineering, 2018 In the present study, we report our findings on various asphaltenes-water interactions at a high reservoir condition (550 K and 200 bar) and the role of water in asphaltene association during the waterflooding process. Molecular dynamics (MD) simulations are performed on oil/water and oil/brine systems. The oil phase is composed of asphaltenes (10 wt%)
arxiv +1 more source