Browsing NTNU Open by Author "Norrman, Jens"
Now showing items 1-12 of 12
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Absorption of CO2 in lyotropic liquid crystals
Rodriguez Fabia, Sandra; Øyen, Marita; Winter-Hjelm, Nicolai; Norrman, Jens; Lund, Reidar; Sørland, Geir; Knuutila, Hanna; Sjøblom, Johan; Paso, Kristofer Gunnar (Peer reviewed; Journal article, 2020)Vapor–liquid equilibria data of three poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide)/water liquid crystals (LCs) with CO2 has been obtained up to 6 bar. The investigated LCs consist of 60% (EO)3(PO)50(EO)3 ... -
Amino-functionalized iron oxide nanoparticles designed for adsorption of naphthenic acids
Simonsen, Galina; Strand, Mikael; Norrman, Jens; Øye, Gisle (Journal article; Peer reviewed, 2019)Amino-functionalized silica-coated iron oxide (Fe3O4/SiO2 NH2/C18) magnetic nanoparticles were synthesized, and amino-surface modification was performed with a high-pressure autoclave experiment and newly developed reflux ... -
CO2 in Lyotropic Liquid Crystals: Monoethanolamine-Facilitated Uptake and Swelling
Rodriguez Fabia, Sandra; Norrman, Jens; Sjøblom, Johan; Paso, Kristofer Gunnar (Journal article; Peer reviewed, 2018)Ternary systems consisting of amphiphilic block copolymers/water/monoethanolamine (MEA) have been studied as potential solvents for carbon capture and storage (CCS). The phase behavior of two poly(ethylene oxide)-poly(propylene ... -
CO2 in Lyotropic Liquid Crystals: Phase Equilibria Behavior and Rheology
Rodriguez Fabia, Sandra; Norrman, Jens; Knuutila, Hanna K; Sjøblom, Johan; Paso, Kristofer Gunnar (Journal article; Peer reviewed, 2019)The CO2 absorption of liquid crystalline phases of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (Pluronic L92, (EO)8(PO)47(EO)8), monoethanolamine (MEA), and water, with a composition of 60% L92/10% ... -
Influence of Measuring Geometry on Rheomalaxis of Macrocrystalline Wax–Oil Gels: Alteration of Breakage Mechanism from Adhesive to Cohesive
Rodriguez Fabia, Sandra; Fyllingsnes, Regina Lopez; Winter-Hjelm, Nicolai; Norrman, Jens; Paso, Kristofer Gunnar (Journal article; Peer reviewed, 2019)Rheological measurement of wax–oil gel breakage is highly susceptible to the phenomenon of adhesive breakage, hindering instrument-scale replication of cohesive breakage processes. Adhesive breakage measurements are ... -
Influence of Microcrystalline Wax on the Properties of Model Wax-Oil Gels
Kurniawan, Muh; Subramanian, Sreedhar; Norrman, Jens; Paso, Kristofer Gunnar (Journal article; Peer reviewed, 2018)The influence of microcrystalline wax addition upon the rheological properties of model wax-oil gels is investigated. Addition of less than 1 wt % microcrystalline wax to a model oil consisting of 5 wt % macrocrystalline ... -
Influence of Wax Inhibitor Molecular Weight on Solution Crystallization and Rheology of Monodisperse Waxes
Kurniawan, Muh; Ruwoldt, Jost; Norrman, Jens; Paso, Kristofer Gunnar (Peer reviewed; Journal article, 2021)Molecular weight fractionation via stepwise precipitation or chain scission is performed on four pour point depressant polymers to study the pour point reduction mechanism. An homologous series of model oils is prepared ... -
Introducing Video-Recorded Lab Experiments into Assignments for Surface and Colloid Chemistry Students
Dudek, Marcin; Raghunathan, Karthik; Regli, Samuel K.; Norrman, Jens; Øye, Gisle (Peer reviewed; Journal article, 2022)This communication describes our initial experience modifying traditional (written and calculation-based) assignments in the surface and colloid chemistry course given as a part of the chemical engineering program. The new ... -
Microfluidic Interfacial Tension
Selvik, Veslemøy (Master thesis, 2022)En metode for å måle overflatespenning ved hjelp av microfluidics har blitt utviklet. Utviklingen av modellen følger metodikk publisert i litteraturen. En ikke-ionisk surfaktant ble brukt for å manipulere overflatespenning ... -
Modeling of surfactant adsorption on coated quartz crystal surfaces during surfactant flooding process
Nourani, Meysam; Tichelkamp, Thomas; Gawel, Bartlomiej; Norrman, Jens; Øye, Gisle (Peer reviewed; Journal article, 2020)The focus of this study was the experimental determination of surfactant adsorption during low salinity water injection combined with surfactant flooding (LSW-SF) into an oil reservoir and development of an analytical model ... -
Pour point depressant efficacy as a function of paraffin chain-length
Kurniawan, Muh; Norrman, Jens; Paso, Kristofer Gunnar (Peer reviewed; Journal article, 2022)Pour point depressant (PPD) activity mechanisms include solubilization, morphology alteration, and steric/entropic repulsion. A wealth of complex intermolecular interactions governs PPD efficacies in real crude compositions. ... -
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 ...