Browsing NTNU Open by Author "Sjøblom, Johan"
Now showing items 41-56 of 56
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Interfacial properties pertinent to W/O and O/W emulsion systems prepared using polyaromatic compounds
Niu, Zheng; Manica, Rogerio; Li, Zuoli; He, Xiao; Sjøblom, Johan; Xu, Zhenghe (Journal article; Peer reviewed, 2019)Establishing interfacial science to understand molecular mechanisms of stabilizing water in heavy crude oil (W/O) emulsions is challenging due to non-transparent nature of crude oil even in diluted systems, as most of the ... -
Kinetics of Crystallization of Aqueous Droplets in Water-in-Crude Oil Emulsions at Low Temperatures
Derkash, S. R.; Kolotova, D.; Rodionova, Galina; Simon, Sebastien Charles; Sjøblom, Johan; Andrianov, A. V.; Malkin, A.Ya. (Journal article; Peer reviewed, 2018)This study focused on the examination of the isothermal crystallization of aqueous droplets in water-in-crude oil emulsions with water concentrations in the range of 5 to 20 wt %. Experiments were carried out using ... -
Lyotropic Liquid Crystals: CO2 Capture and Phase Behavior
Fabià, Sandra Rodriguez (Doctoral theses at NTNU;2019:122, Doctoral thesis, 2019)The rising greenhouse gas emissions, in particular CO2, have contributed to an increase of the global temperature. In order to combat the severe effects of climate change, actions are being taken to favor a switch to low ... -
Methodology to calculate interfacial tension under electric field using pendent drop profile analysis
Mhatre, Sameer; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2019)In this paper, we present a methodology to calculate interfacial tension of a water–oil interface under an electric field. The Young–Laplace equation, conventionally used to estimate surface/interfacial tension in axisymmetric ... -
Microcalorimetry Study of the Adsorption of Asphaltenes and Asphaltene Model Compounds at the Liquid–Solid Surface
Pradilla Ragua, Diego Camilo; Subramanian, Sreedhar; Simon, Sebastien Charles; Sjøblom, Johan; Beurroies, Isabelle; Denoyel, Renaud (Journal article; Peer reviewed, 2016)The adsorption of an acidic polyaromatic asphaltene model compound (C5PeC11) and indigenous C6-asphaltenes onto the liquid–solid surface is studied. Model compound C5PeC11 exhibits a similar type of adsorption with a plateau ... -
Model molecules mimicking asphaltenes
Sjøblom, Johan; Simon, Sebastien Charles; Xu, Zhenghe (Journal article; Peer reviewed, 2015)Asphalthenes are typically defined as the fraction of petroleum insoluble in n-alkanes (typically heptane, but also hexane or pentane) but soluble in toluene. This fraction causes problems of emulsion formation and ... -
Naphthenic acid solubility in produced water and their interactions with divalent cations
Bertheussen, Are (Doctoral theses at NTNU;2018:259, Doctoral thesis, 2018)To keep up with the growing energy demands, the production of high acid crudes is increasing worldwide. This acidity is mainly caused by a subgroup of resins called naphthenic acids. With the increased production and ... -
Rheological Properties of Gels Formed at the Oil−Water Interface by the Reaction between Tetrameric Acid and Calcium Ion under Flow Conditions and at the Batch Scale
Simon, Sebastien Charles; Blanco, Estefania; Gao, Bicheng; Sjøblom, Johan; Passade-Boupat, Nicolas; Palermo, Thierry; Rondon-Gonzalez, Marianna (Journal article; Peer reviewed, 2019)The interfacial reaction between ARN tetrameric acid and Ca2+, which leads to the formation of calcium naphthenate deposits, was studied using a coaxial capillary device fitted to a profile analysis tensiometer. This device ... -
Rheological properties of highly concentrated dense packed layer emulsions (w/o) stabilized by asphaltene
Kelesoglu, Serkan; Barrabino, Albert; Sørland, Geir Humborstad; Simon, Sebastien Charles; Paso, Kristofer Gunnar; Sjøblom, Johan (Journal article; Peer reviewed, 2015)Dense packed layers (DPLs) were sedimented and removed from various asphaltene stabilized w/o emulsion batches, and contained aqueous phase volume fractions (ϕ) between 0.701 and 0.808. These values are close to the ... -
Screening of Inhibition of Calcium Naphthenate Deposition in Crude Oil
Simon, Sebastien Charles; Ehret, Kim; Darcel, Pauline; Sjøblom, Johan; Passade-Boupat, Nicolas; Palermo, Thierry (Peer reviewed; Journal article, 2021)One of the initial steps in calcium naphthenate deposition is the reaction between ARN and Ca2+ leading to the formation of an interfacial gel. After growing, this gel will form calcium naphthenate deposits that are a ... -
Shape evolution of a water drop in asphaltene solution under weak DC electric fields
Mhatre, Sameer; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2019)The microscopic shape change of a pendent water drop, surrounded by an organic solution containing asphaltenes extracted from heavy crude oil, under electric field is investigated. Weak constant DC electric fields were ... -
Solvent desorption of asphaltenes from solid surfaces
Tapio, Lene Katrin; Subramanian, Sreedhar; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2017)The main goal of this paper is to compare the ability of different organic solvents to desorb asphaltenes from stainless steel surfaces. The asphaltenes were extracted from a North Sea crude oil by precipitation. The organic ... -
Some Compositional Viscosity Correlations for Crude Oils from Russia and Norway
Malkin, A.Ya.; Rodionova, Galina Nikolaevna; Simon, Sebastien Charles; Ilyin, S.O.; Arinina, M.P.; Kulichikhin, V.G.; Sjøblom, Johan (Journal article; Peer reviewed, 2016)The current work is based on experimental viscosity and compositional data of about 200 crude oil samples from various parts of Russia and the Norwegian continental shelf. Data analyses were performed to estimate correlations ... -
Sorption and Interfacial Rheology Study of Model Asphaltene Compounds
Pradilla Ragua, Diego Camilo; Simon, Sebastien Charles; Sjøblom, Johan; Samaniuk, Joseph; Skrzypiec, Marta; Vermant, Jan (Journal article; Peer reviewed, 2016)The sorption and rheological properties of an acidic polyaromatic compound (C5PeC11), which can be used to further our understanding of the behavior of asphaltenes, are determined experimentally. The results show that ... -
Synergistic Adsorption of Polyaromatic Compounds on Silica Surfaces Studied by Molecular Dynamics Simulation
Xiong, Yong; Li, Zhen; Cao, Tiantian; Xu, Shengming; Yuan, Shiling; Sjøblom, Johan; Xu, Zhenghe (Journal article; Peer reviewed, 2018)Adsorption on silica surfaces of polyaromatic compounds, N-(1-hexylhepyl)-N′-(5-carboxylicpentyl)-perylene-3,4,9,10-tetracarboxylic bisimide (C5Pe) and N-(1-undecyldodecyl)-N′-(5-carboxylicpentyl)-perylene-3,4,9,10-tetracarboxylic ... -
Wax-Inhibitor Interactions Studied by Isothermal Titration Calorimetry and Effect of Wax Inhibitor on Wax Crystallization
Ruwoldt, Jost; Simon, Sebastien Charles; Norrman, Jens; Oschmann, Hans-Jörg; Sjøblom, Johan (Journal article; Peer reviewed, 2017)Isothermal titration calorimetry is applied to investigate the interactions of polymeric pour-point depressants (PPDs) or asphaltenes with macrocrystalline wax in a model oil system. This represents a novel approach to ...