Results 71 to 80 of about 22,271 (251)
Study of Asphaltene Structure Precipitated from Oil Sands
Eurasian Chemico-Technological Journal, 2013 In the paper microscopic structure and physicochemical characteristics of asphaltenes were investigated. Asphaltene was precipitated from natural bitumen of oil sand of Munaily-Mola deposit using organic solvent of petroleum ether.
F. R. Sultanov +6 more
doaj +1 more source
Chemical characterization of liquefaction products of an inertinite enriched northern Alaska coals [PDF]
, 1989 A Northern Alaskan coal rich in inertinites was further enriched by density gradient separations. The degree of condensation of the enriched coal was estimated to be low, mainly 3 ring.
Mayasandra, Venugopal
core
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.
Ges, G. A. +4 more
core +1 more source
Géochimie des résines et asphaltènes Geochernistry of Resins and Asphaltenes
Oil & Gas Science and Technology, 2006 Les produits lourds des huiles brutes (résines et asphaltènes) jouent un rôle important dans la genèse et l'accumulation du pétrole, ainsi que dans la mise en production par des méthodes conventionnelles ou par récupération assistée.
Tissot B.
doaj +1 more source
Journal of Chemometrics, Volume 40, Issue 2, February 2026.ABSTRACT Conventional geochemical biomarkers include saturated, aromatic, and carboxylic acid compounds. Saturated and aromatic biomarkers, however, form the foundation of many geochemical studies because of their abundance and intrinsic significance.
Alek A. C. de Sousa +7 more
wiley +1 more source
Surfactant-assisted liquefaction of particulate carbonaceous substances [PDF]
, 1978 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
Experimental methods in chemical engineering: Electrospinning
The Canadian Journal of Chemical Engineering, Volume 104, Issue 2, Page 556-568, February 2026.Abstract Electrospinning produces micro‐ and nanofibres by forcing a polymeric solution through a fine needle in an electric field that produces a filament that accumulates onto a collector plate. The fibre morphology depends on solution properties, distance between needle and plate, feed rate, and electric field intensity.
M. Olga Guerrero‐Pérez +2 more
wiley +1 more source
Computer Simulation of Asphaltenes
Petroleum Chemistry, 2018 The review describes theoretical approaches based on computer simulations at various levels of details (from quantum chemical calculations to atomistic and coarse-grained models) to study asphaltenes and systems containing asphaltenes. The used methods are described, their advantages and disadvantages are discussed in terms of computational costs and ...
S. V. Lyulin +9 more
openaire +2 more sources
Data in Brief, 2020 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 +1 more source
Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.Abstract The Permian–Triassic environmental crisis triggered fundamental changes in marine ecosystems, culminating in the most severe biodiversity crisis of the Phanerozoic. Yet, the environmental and geochemical conditions governing the crisis and ecosystem recovery remain debated.
S. Z. Buchwald +17 more
wiley +1 more source