Results 231 to 240 of about 21,307 (276)

Synthesis of a novel carbon-based nano-emulsifier and its application in viscosity reduction of emulsified Jurassic oil in the Sichuan Basin. [PDF]

RSC Adv
Chen W, He R, Liu R, Zeng J, Liu R, Wang H, Guan W, Lv Z, Fu B, Pu W.   +9 more
europepmc   +1 more source

Exploring the Effect of Relaxation Time, Natural Surfactant, and Potential Determining Ions (Ca²⁺, Mg²⁺, and SO₄^2-) on the Dynamic Interfacial Tension Behavior of Model Oil-Brine Systems. [PDF]

Heliyon
Mohammadi A, Keradeh MP.
europepmc   +1 more source

Asphaltenes size polydispersity reduction by nano and ultrafiltration separation method. Comparison with the floculation method.

, 2007
João Pedro Marques, Isabelle Merdrignac, Arnaud Baudot, Loı̈c Barré, Denis Guillaume, D. Espinat, Sylvette Brunet   +6 more
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Electrokinetic Characterization of Asphaltenes and the Asphaltenes−Resins Interaction [PDF]

Energy & Fuels, 2003
The electrophoretic mobility of asphaltene particles formed by precipitation induced by the addition of n-heptane to asphaltene solutions in toluene was measured in water and in nonpolar media. Dispersed in water, the particles presented a negative electrophoretic mobility, whereas in toluene their mobility was positive and around 2.0 × 10-9 m2/V s ...
Marcia Dos Anjos De Sousa, Guilherme B. M. Neves, Sandra M. Saraiva, Gaspar González, Elizabete F. Lucas   +4 more
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ADSORPTION OF ASPHALTENE FUNTIONALITIES AND ASPHALTENE ON GOETHTTE

Fuel Science and Technology International, 1995
ABSTRACT Solid-stabilized water-in-oil emulsions cause many problems such as oil loss, fouling of a processing unit, and environmental hazard in the petroleum production and refining. The ability of finely divided solids to stabilize these emulsions is due to the adsorption of asphaltenes and other heavy constituents. This study presents the individual
Sang J. Choi, Young W. Jeon, Sug H. Yi
openaire   +2 more sources

Asphaltene Cake Properties

Energy & Fuels, 2008
One of the major problems encountered during the exploitation of the oil reservoir is the deposition of asphaltene in the porous rock near the wellbore. The crude oil asphaltene considerably reduces the rock permeability and, consequently, the oil production.
Montel, Valérie, Lazzeri Pordoy, Véronique, Brocart, B., Zhou, Honggang   +3 more
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Effects of asphaltene concentration and asphaltene agglomeration on viscosity

Fuel, 2019
Abstract Asphalenes are regarded as the most polar and heaviest components in crude oil system. Their precipitation and agglomeration cause problems in oil recovery, production, and transportation. Asphaltenes are directly responsible for determining the viscosity of crude oil.
Xingxun Li, Pengcheng Chi, Xuqiang Guo, Qiang Sun   +3 more
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Solution Properties of Asphaltenes

Langmuir, 2008
Ultracentrifugation has been used to produce asphaltene fractions of reduced polydispersity. The structure of these asphaltene fraction solutions has been investigated using viscosity and X-ray scattering (SAXS) measurements as a function of concentration.
Sébastien Simon, Loïc Barré, Thierry Palermo   +2 more
openaire   +3 more sources

The Asphaltenes

Annual Review of Analytical Chemistry, 2011
Asphaltenes, the most aromatic of the heaviest components of crude oil, are critical to all aspects of petroleum utilization, including reservoir characterization, production, transportation, refining, upgrading, paving, and coating materials. The asphaltenes, which are solid, have or impart crucial and often deleterious attributes in fluids such as ...
openaire   +2 more sources