Results 41 to 50 of about 6,753 (224)
مجلة بغداد للعلوم, 2014 This study is a complementary one to an extended series of research work that aims to produce a thermodynamiclly stable asphalt –sulfur blend. Asphalt was physically modified wiht different percentages of asphaltenes , oxidized asphaltenes and then ...
Baghdad Science Journal
doaj +1 more source
A New Approach to Determine Asphaltenes Stability [PDF]
, 2017 Asphaltenes stability is a phase behavior phenomenon and affected mainly by the change in pressure and temperature. However, the changes in pressure and temperature lead compositional changes, hence, the dependency of asphaltenes stability on crude oil ...
Berna Hascakir
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Oil & Gas Science and Technology, 2006 The adsorption isotherms for phenol and 4-chlorophenol from water onto asphaltenes flocculated in bulk and asphaltenes deposited on silica were established by frontal analysis chromatography at 293, 298, 303, and 308 K.
Jaoui M. +3 more
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Asphaltenes at Oil/Gas Interfaces: Foamability Even with No Significant Surface Activity
Colloids and Interfaces, 2018 In the oil industry, oil foams can be found at different steps from the crude oil treatment to the gas stations. Their lifetime can sometimes reach several hours and be much longer than the residence times available for gas/liquid separation.
Mélanie Arangalage +4 more
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Química Nova, 2021 Asphaltenes fractions were extracted and purified from three heavy Brazilian oils. Their mass compositions of C, H, N, Ni and V were obtained from elemental analysis and S and O atomic percentages from EDS.
Hemmely Guilhermond de Souza Severino +5 more
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The Fractal Aggregation of Asphaltenes [PDF]
, 2016 This paper discusses time-resolved small-angle neutron scattering results that were used to investigate asphaltene structure and stability with and without a precipitant added in both crude oil and model oil.
Michael P. Hoepfner (1873363) +3 more
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Characterisation of an algerian asphaltene by 1H and 13C CPMAS NMR, DEPT and ESI mass spectroscopy
Egyptian Journal of Petroleum, 2021 Quantitative liquid 1H and solid 13C CPMAS NMR spectroscopy were used in combination with qualitative DEPT (Distortionless Enhancement by Polarization Transfer) and liquid 13C NMR to investigate the molecular structural parameters of an Algerian ...
A.C. Djendara +4 more
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Graphitic carbon nanoparticles from asphaltenes [PDF]
, 2011 We report preliminary studies on the preparation of carbon nanoparticles (CNPs) of 3c20 nm in diameter derived from asphaltenes under mild conditions.
Danumah, Christophe +5 more
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Scientific Reports, 2023 Asphaltene precipitation and its adsorption on different surfaces are challenging topics in the upstream and downstream of the oil industries and the environment.
Sajjad Ansari +6 more
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Influence of dispersing additive on asphaltenes aggregation in model system [PDF]
, 2016 The work is devoted to investigation of the dispersing additive influence on asphaltenes aggregation in the asphaltenes-toluene-heptane model system by photon correlation spectroscopy method.
Tukhvatullina, A. Z. +4 more
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