Browsing NTNU Open by Author "Simon, Sebastien Charles"
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A critical update of experimental techniques of bulk and interfacial components for fluid characterization with relevance to well fluid processing and transport
Simon, Sebastien Charles; Ruwoldt, Jost; Sjøblom, Johan (Journal article; Peer reviewed, 2020)The present article reviews techniques to address central flow assurance and separation issues. It is our purpose to update the need for extended information in order to draw adequate conclusions about the reason for ... -
A DPD study of asphaltene aggregation: The role of inhibitor and asphaltene structure in diffusion-limited aggregation
Skartlien, Roar; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2017)The kinetic effects of DBSA (dodecyl benzene sulfonic acid) and a linear amphihile on asphaltene aggregation was investigated, using dissipative particle dynamics molecular simulations. The simulation results indicated ... -
An ITC and NMR study of interaction and complexation of asphaltene model compounds in apolar solvent I: Self-association pattern
Simon, Sebastien Charles; Wei, Duo; Barriet, Mathilde Isabelle; Sjøblom, Johan (Journal article; Peer reviewed, 2016)The self-association pattern of asphaltene model compounds with different functional groups in xylene and mixtures of xylene and heptane have been studied by isothermal titration calorimetry (ITC) to shed new light on the ... -
An ITC study of interaction and complexation of asphaltene model compounds in apolar solvent II: Interactions with asphaltene inhibitors
Wei, Duo; Simon, Sebastien Charles; Barriet, Mathilde Isabelle; Sjøblom, Johan (Journal article; Peer reviewed, 2016)The interaction and complexation of asphaltene model compounds containing functional groups with other crude oil compounds in a mixture of xylene and heptane have been studied to shed new light on the association and ... -
Asphaltene fractionation based on adsorption onto calcium carbonate: Part 1. Characterization of sub-fractions and QCM-D measurements
Subramanian, Sreedhar; Simon, Sebastien Charles; Gao, Bicheng; Sjøblom, Johan (Journal article; Peer reviewed, 2016)A new fractionation procedure was developed based on adsorption of asphaltenes onto calcium carbonate. The fractions obtained were characterized by elemental analysis, Fourier Transform Infrared Spectroscopy (FTIR) and ... -
Asphaltene fractionation based on adsorption onto calcium carbonate: Part 3. Effect of asphaltenes on wax crystallization
Ruwoldt, Jost; Subramanian, Sreedhar; Simon, Sebastien Charles; Oschmann, Hans-Jörg; Sjøblom, Johan (Journal article; Peer reviewed, 2018)Asphaltenes fractionation procedures were developed and tested in two preceding articles (doi: https://doi.org/10.1016/j.colsurfa.2016.02.011, doi: https://doi.org/10.1016/j.colsurfa.2016.11.035), and asphaltene fractions ... -
Asphaltene Precipitation Models: A Review
Subramanian, Sreedhar; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2016)Asphaltenes are the heaviest and the most polar fractions of crude oil and are defined as a solubility class (typically soluble in toluene but insoluble in n-alkanes like n-heptane). Precipitation and deposition of asphaltenes ... -
Asphaltenes subfractions extracted from Brazilian vacuum residue: Chemical characterization and stabilization of model water-in-oil (W/O) emulsions
Zorzenao, Priscila C.S.; Mariath, Rubia M.; Pinto, Fernanda E.; Tose, Lilian V.; Romão, Wanderson; Santos, Alexandre F.; Scheer, Agnes P.; Simon, Sebastien Charles; Sjøblom, Johan; Yamamoto, Carlos I. (Journal article, 2018)Asphaltenes were obtained from a Brazilian vacuum residue (VR) by precipitation with different ratios of n-heptane/VR to give three asphaltene subfractions. The behavior of these different subfractions in relation to the ... -
Assessing the Interfacial Activity of Insoluble Asphaltene Layers: Interfacial Rheology versus Interfacial Tension
Alicke, Alexandra; Simon, Sebastien Charles; Sjøblom, Johan; Vermant, Jan (Peer reviewed; Journal article, 2020)Asphaltenes have been suggested to play an important role in the remarkable stability of some water-in-crude oil emulsions, although the precise mechanisms by which they act are not yet fully understood. Being one of the ... -
Cellulose nanofibrils as rheology modifier in mayonnaise – A pilot scale demonstration
Heggset, Ellinor Bævre; Aaen, Ragnhild; Veslum, Trinelise; Henriksson, Marielle; Simon, Sebastien Charles; Syverud, Kristin (Peer reviewed; Journal article, 2020)The applicability of cellulose nanofibrils (CNFs) as viscosifying agent in a starch-reduced low-fat mayonnaise and in an oil-reduced full-fat mayonnaise has been considered. For low-fat mayonnaise a 50 wt% reduction in the ... -
Cellulose nanofibrils as rheology modifiers and stabilizers in food systems
Aaen, Ragnhild (Doctoral theses at NTNU;2020:291, Doctoral thesis, 2020)Food additives are components used in many food products to improve qualities such as flavor, appearance or texture. In low-fat and non-fat food products, food additives called fat-replacers are added to the food products ... -
Coalescence Behavior of Stable Pendent Drop Pairs Held at Different Electric Potentials
Mhatre, Sameer; Hjartnes, Tomas; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2020)In this work, we studied the electrocoalescence behavior of stable pendent drop pairs and compared the results with clean drops, where the interface is void of surface-active compounds. The drop phase was brine and the ... -
Comparing C5Pe and Asphaltenes under Temperature and Pressure Reservoir Conditions Using an Acoustic Wave Sensor
Cassiède, Marc; Carrier, Hervé; Daridon, Jean-Luc; Simon, Sebastien Charles; Sjøblom, Johan (Peer reviewed; Journal article, 2021)A quartz crystal resonator (QCR) was employed to assess the ability of the C5Pe model asphaltene compound to form nanoaggregates in toluene and bigger flocs that adsorb on the QCR surfaces at a higher concentration of ... -
Demulsification of Crude Oil Emulsions Tracked by Pulsed Field Gradient (PFG) Nuclear Magnetic Resonance (NMR). Part I: Chemical Demulsification
Hjartnes, Tomas; Sørland, Geir H.; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2019)Emulsified water droplets must be extracted from crude oil for economical and transport purposes, which is achievable by chemical demulsification. Four different chemicals were tested on water-in-crude oil emulsions using ... -
Demulsification of crude oil emulsions tracked by pulsed field gradient NMR. Part II: Influence of chemical demulsifiers in external AC electric field
Hjartnes, Tomas; Mhatre, Sameer; Gao, Bicheng; Sørland, Geir; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2020)Crude oil emulsions can reach stability levels that pose severe challenges for the processing industry. Certain conventional methods are used to deal with these challenges, such as chemical demulsification. In this article, ... -
Demulsifier assisted film thinning and coalescence in crude oil emulsions under DC electric fields
Mhatre, Sameer; Simon, Sebastien Charles; Sjøblom, Johan; Xu, Zhenghe (Journal article, 2018)Electrocoalescence has been considered a most efficient method of crude oil dewatering; however, just electric fields are not enough when dealing with heavy crude oils. In this workwe studied effect of asphaltene flocculation ... -
Droplet Crystallization in Water-in-Crude Oil Emulsions: Influence of Salinity and Droplet Size
Kolotova, D.; Brichka, K.; Rodionova, Galina; Simon, Sebastien Charles; Derkach, S.; Paso, Kristofer Gunnar; Sjøblom, Johan (Journal article; Peer reviewed, 2017)Ice crystallization in confined spherical geometries is investigated experimentally at ambient pressure conditions. Water-in-crude (w/o) oil emulsions are formed by homogenization of an acidic North Sea crude oil with water ... -
Electrocoalescence of water in oil emulsions: a DPD simulation study and a novel application of electroporation theory
Skartlien, Roar; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2019)Pore formation in a surfactant laden oil film between two aqueous electrolyte layers in a DC field was studied using DPD (Dissipative Particle Dynamics molecular simulation). This setting represents the final stage of an ... -
Emulsions in external electric fields
Sjøblom, Johan; Mhatre, Sameer; Simon, Sebastien Charles; Skartlien, Roar; Sørland, Geir (Peer reviewed; Journal article, 2021)Water is co-produced with crude oils, generally in the form of water-in-crude oil emulsions. The oil and water phases need to be separated before export. Separation is performed in gravity separators with the addition of ... -
Enhanced sedimentation and coalescence of petroleum crude oil emulsions by the new generation of environmentally friendly yellow chemicals
Barrabino, Albert; Kelesoglu, Serkan; Eftekhardadkhah, Mona; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2017)This study compares by means of new and advanced destabilization protocols the efficiency of new chemistry environmentally friendly (yellow) demulsifiers with already commercially available red demulsifiers in destabilizing ...