Results 91 to 100 of about 6,753 (224)

Precipitation and characterization of petroleum asphaltenes. [PDF]

, 2004
The goal of this work is to obtain a better understanding of the properties of petroleum asphaltenes and their stability in term of asphaltene precipitating tendency.
Wattana, Piyarat
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Oxidation of Petroleum Asphaltenes Coupled with Iodination [PDF]

, 2020
© 2020, Springer Science+Business Media, LLC, part of Springer Nature. Oxidation of petroleum asphaltenes by potassium iodide (KI) is described. Oxidation under mild conditions is shown to be accompanied by iodination of the asphaltene aromatic core. The
Saifina A.F., Borisov D.N., Shabalin K.V., Khannanov A.A., Musin L.I., Vakhitov I.R., Foss L.E., Gubaidullin A.T., Nagornova O.A.   +8 more
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Effect of cavitation on the structural characteristics of oil asphaltenes

Тонкие химические технологии
Objectives. To investigate the influence of hydrodynamic cavitation on the group hydrocarbon composition of straight-run fuel oil and the structural characteristics of its asphaltenes.Methods.
D. V. Nikishin, B. V. Peshnev, A. I. Nikolaev   +2 more
doaj   +1 more source

An Evaluation of the Delayed-Coking Product Yield of Heavy Feedstocks Using Asphaltene Content and Carbon Residue Évaluation du rendement en produit de cokéfaction différée de pétrole lourd à l'aide de la teneur an asphaltènes et du résidu de coke

Oil & Gas Science and Technology, 2006
Six residua from different crude oils were evaluated for composition and carbon residue forming tendencies. The whole residua were evaluated for elemental composition, trace metals content, carbon residue, and specific gravity.
Schabron J. F., Speight J. G.
doaj   +1 more source

Modeling of asphaltenes: Assessment of sensitivity of 13C SSNMR to molecular structure [PDF]

, 2012
journal articleAsphaltenes are an important constituent of many oils and one of the major components in heavy oils sources for liquid hydrocarbon fuels.
Badu, Shyam; Pimienta, Ian S. O.; Orendt, Anita M.; Pugmire, Ronald J.; Facelli, Julio C.
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The Critical Micelle Concentration of Asphaltenes as Measured by Calorimetry [PDF]

, 1999
Micellization of asphaltenes in solution has been investigated using a micro calorimetric titration procedure (Andersen, S. I.; Birdi, K. S. J Colloid Interface Sci. 1991, 142, 497).
Christensen, S.D., Christensen, S. D., Andersen, Simon Ivar   +2 more
core   +1 more source

Mixture Effect on the Dilatation Rheology of Asphaltenes-Laden Interfaces [PDF]

, 2017
Asphaltenes are a solubility class of crude oils comprising polyaromatic and heterocyclic molecules with different interfacial activities. The previously neglected effects of compositional mixture on dilatational rheology are discussed in the light of ...
Shaghayegh Darjani (3816808), Vincent Pauchard (1360239), Sanjoy Banerjee (1360254), Nelya Akhmetkhanova (3816811), Charles Maldarelli (1462189), Fang Liu (13271)   +5 more
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Waxes in asphaltenes of crude oils and wax deposits

Petroleum Science, 2016
Composition and molecular mass distribution of n-alkanes in asphaltenes of crude oils of different ages and in wax deposits formed in the borehole equipment were studied. In asphaltenes, n-alkanes from C12 to C60 were detected.
Yulia M. Ganeeva, Tatiana N. Yusupova, Gennady V. Romanov   +2 more
doaj   +1 more source

Characterization of asphaltenes from processed resids [PDF]

, 1997
The current and future trend for petroleum processing is towards conversion of heavier and heavier fractions into useful products such as gasoline and diesel.
Miller, J. T., Hunt, J. E., Winans, R. E.   +2 more
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Role of oxidative pretreatment on asphaltenes enhancement for carbon fiber precursor production from vacuum residue (VR)

Next Materials
There is growing interest in utilizing petroleum residue to useful carbon materials for economic diversification of low-value petroleum byproducts. Due to chemical complexity and the presence of impurities, it requires pretreatment which traditionally ...
Mustafa M. Amin, Ajay Sharma, Mohammad M. Hossain, Muhammad N. Siddiquee   +3 more
doaj   +1 more source