Results 111 to 120 of about 35,153 (304)
Asphaltene aggregation is a subject under vivid discussion: There are several parameters one needs to determine before its behavior can be mastered and better target solutions can be tailored.
H. Santos Silva+5 more
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This study presents analysis of asphaltenes isolated from two crude oils: naphthenic-aromatic biodegraded oil and paraffin-naphthenic oil, which have been used as precursors for carbon materials synthesis.
Andrey Grinko+10 more
doaj
REVIEW OF STUDIES ON ASPHALTENE - WAX INTERACTION AND THE EFFECT THEREOF ON CRYSTALLIZATION
This paper reviews the impact of asphaltenes on wax crystallization and on the properties of crude oils, and the consequences thereof on the flow assurance of waxy crude oil.
Emiliano Ariza-León+2 more
doaj
Asphaltenes can cause enormous losses in the oil industry, because they are soluble only in aromatic solvents. Therefore, they must be removed from the petroleum before it is refined, using flocculant agents. Aiming to find new materials that can work as
G. E. Oliveira+3 more
doaj
Surfactant-assisted liquefaction of particulate carbonaceous substances [PDF]
A slurry of carbonaceous particles such as coal containing an oil soluble polar substituted oleophilic surfactant, suitably an amine substituted long chain hydrocarbon, is liquefied at high temperature and high hydrogen presence.
Hsu, G. C.
core +1 more source
Influence of polar solvents on the straight distillation of crude oil [PDF]
It is offered to use for activation of oil raw materials of an additive of polar organic solvents. It is shown that for a preliminary estimate of activating action of additives it is possible to use results of the comparative analysis of properties of ...
Grushova, E. I., Sharif, A. S.
core
A better understanding of the behavior of asphaltenes is paramount for improving processes related to heavy crude oil, such as transport. Previous research has studied its aggregation [1], as well as its average chemical structure [2].
Manuel Roa, Ivan Amaya, Rodrigo Correa
doaj
Crude oils contain a variety of components - including asphaltenes - that can adsorb onto mineral surfaces and alter wetting. What distinguishes the asphaltenes from other constituents of an oil is their tendency to aggregate and even separate from the ...
Buckley J. S.
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AVALIAÇÃO DE ASFALTENOS PRECIPITADOS EM DIFERENTES CONDIÇÕES DE COMPOSIÇÃO, TEMPERATURA E PRESSÃO
Asphaltenes are a heavy fraction of petroleum with the ability for self-association, a phenomenon that can occur spontaneously in the reservoirs or in any of the various stages of production and processing, depending on variations in pressure ...
Lyzette Gonçalves Moraes de Moura+1 more
doaj +1 more source
Investigation of Asphaltene Stability in the Iranian Crude Oils [PDF]
The influence of different factors on the asphaltene stability in three iranian crude oils was evaluated. Compositional studies and structural characterization of resins and asphaltenes were carried out in order to study a possible relationship between ...
doaj