Results 81 to 90 of about 35,311 (304)
ChemistryOpen, EarlyView.P(AM‐EHMA‐VBS‐VP), a novel polymeric demulsifier, adsorbs at the interface, reduces interfacial modulus, overcomes asphaltene‐inhibited coalescence, and promotes droplet coalescence for effective demulsification. This study presents the synthesis and characterization of a novel polymeric demulsifier, P(AM‐EHMA‐VBS‐VP), through emulsion polymerization ...
Xuezhi Li +5 more
wiley +1 more source
Deposition of colloidal asphaltene in capillary flow: Experiments and mesoscopic simulations [PDF]
, 2008 The aggregation and deposition of colloidal asphaltene in reservoir rock is a significant problem in the oil industry. To obtain a fundamental understanding of this phenomenon, we have studied the deposition and aggregation of colloidal asphaltene in ...
Boek, ES +3 more
core +2 more sources
Coarse‐grained molecular dynamics reveals rejuvenation behavior in aged asphalt
Computer-Aided Civil and Infrastructure Engineering, EarlyView.Abstract To address the issue of insufficient spatiotemporal scales in all‐atom molecular dynamics (MD) simulations, this study employs coarse‐grained MD (CGMD) based on the MARTINI 3.0 force field to simulate the rejuvenation behavior of asphalt. Based on all‐atom molecular structure coarse‐grained mapping, molecular models of both virgin and aged ...
Liang He +8 more
wiley +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
Separation and characterization of asphaltenic subfractions [PDF]
Química Nova, 2012 The structure of the various asphaltenic subfractions found in crude oil was evaluated. For this purpose, C5 asphaltenes were extracted from an asphaltic residue using n-pentane as the flocculant solvent. The different subfractions were isolated from the C5 asphaltenes by the difference in solubility in different solvents.
Honse, Siller O. +4 more
openaire +5 more sources
Aggregation of model asphaltenes – a molecular dynamics study [PDF]
, 2016 Natural asphaltenes are defined as polyaromatic compounds whose chemical composition and structure is dependent on its geological origin and production history, hence are regarded as complex molecules with aromatic cores and aliphatic tails that occur in
Costa, J L L F S +3 more
core +2 more sources
, 2018 A series of molecular dynamics simulations were performed to investigate the effects of model asphaltenes on the toluene/water interfacial tension (IFT) under high temperature and pressure conditions.
Cuiying Jian +3 more
semanticscholar +1 more source
Fines deposition during hydrotreating: Effects of catalyst size and bed arrangement
The Canadian Journal of Chemical Engineering, Volume 103, Issue 9, Page 4390-4401, September 2025.Abstract Fines deposition presents a significant problem during the hydrotreating of bitumen‐derived gas oils. The accumulation of fines leads to reactor clogging and consequently, pressure drop buildup. At critical levels, the hydrotreating reactor must be prematurely shutdown, resulting in substantial economic losses for refineries.
Simon Kwao +3 more
wiley +1 more source
Impact of Flow Rate and Wettability on the Determination of Relative Permeability from Core Floods [PDF]
, 2010 Imperial Users ...
Lau, Ei Sheen, Lau, Ei Sheen
core
Petroleum, 2020 Asphaltenes removal enhances the quality of the oil and facilitates the processing. In the present work, a NiO/AlPO-5 nanocomposite using green TMG was synthesized as a particular adsorbent for asphaltenes removal. NiO/AlPO-5 was characterized using FTIR,
Majid Mohammadi +2 more
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