Results 21 to 30 of about 6,740 (225)

Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion

Cleaner Materials, 2023
Stabilization of pavement base material using asphalt emulsion has been widely used to improve pavement performance. This technology produces a high-quality base course material with decreased energy consumption, carbon footprint, and raw material usage.
Farshad Kamran, Leila Hashemian
doaj   +1 more source

Asphaltenes and Asphaltene model compounds: Adsorption, Desorption and Interfacial Rheology. [PDF]

, 2016
There are numerous problems encountered during extraction, production, transportation and refining of crude oil. Most of these problems are typically oil-specific, meaning that they depend upon the source of the oil, and sometimes they are reservoir ...
Pradilla, Diego
core   +1 more source

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, Jean-Philippe Gingras, Nicolas Passade-Boupat, François Lequeux, Laurence Talini   +4 more
doaj   +1 more source

Adsorption Isotherms of Phenol and 4-Chlorophenol on Petroleum Asphaltenes Adsorption du phénol et du 4-chlorophénol sur les asphaltènes pétroliers

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., Achard C., Hasnaoui N., Rogalski M.   +3 more
doaj   +1 more source

EVALUATION OF THE CHEMICAL COMPOSITION AND STRUCTURE OF ASPHALTENES FROM THREE OFFSHORE BRAZILIAN BIODEGRADED HEAVY OILS

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, Christiane Béatrice Duyck Pinto, André Luiz Durante Spigolon, Carlos Siqueira Bandeira de Mello, Tais Freitas da Silva, Kátia Zaccur Leal   +5 more
doaj   +1 more source

Experimental measurement and modeling of asphaltene adsorption onto iron oxide and lime nanoparticles in the presence and absence of water

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, Mohammad-Reza Mohammadi, Hamid Bahmaninia, Abdolhossein Hemmati-Sarapardeh, Mahin Schaffie, Saeid Norouzi-Apourvari, Mohammad Ranjbar   +6 more
doaj   +1 more source

Modification Of Rheological Properties Of Asphalt Effect Of Addition Of Asphaltenes And Oxidized Asphaltenes On The Compatibility Of Asphalt- Sulfur Blends

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

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, Y. Bouhadda, T. Fergoug, M. Djabeur, A. Bellil   +4 more
doaj   +1 more source

Experimental Studies on the Adsorption/Occlusion Phenomena Inside the Macromolecular Structures of Asphaltenes

, 2012
International audienceAsphaltenes are the polar macromolecules with complex structures in oils, usually existing as aggregates. Inside the macromolecular structures of asphaltenes, some other fractions can be adsorbed/occluded, and the occluded compounds
Liao, Zewen, Zhang, Linye, Graciaa, Alain, Zhao, Jing, Zhang, L., Liu, Qing, Creux, Patrice, Chrostowska, Anna, Zhao, J., Liao Zewen, Z., Liu, Q.Y.   +10 more
core   +1 more source

Stability and demulsification of emulsions stabilized by asphaltenes or resins

, 2004
Experimental data are presented to show the influence of asphaltenes and resins on the stability and demulsification of emulsions. It was found that emulsion stability was related to the concentrations of the asphaltene and resin in the crude oil, and ...
Lu, SW, Xia, LX, Cao, GY
core   +1 more source