Blar i NTNU Open på forfatter "Sørland, Geir Humborstad"
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Asphaltene fractionation based on adsorption onto calcium carbonate: Part 2. Self-association and aggregation properties
Subramanian, Sreedhar; Sørland, Geir Humborstad; Simon, Sebastien Charles Roger; Xu, Zhenghe; Sjöblom, Johan (Journal article; Peer reviewed, 2017)The self-association and aggregation properties of asphaltene sub-fractions obtained by adsorption onto CaCO3 (doi:http://dx.doi.org/10.1016/j.colsurfa.2016.02.011) were investigated using a combination of near infrared ... -
Influence of HPAM on W/O emulsion separation properties
Sjøblom, Johan; Dagsgård, Camilla Israelsen; Simon, Sebastien Charles; Sørland, Geir Humborstad; Hana, Morten (Journal article; Peer reviewed, 2017)The present study reports on the influence of partially hydrolyzed polyacrylamide (HPAM) on essential w/o emulsion properties. The characterization has been undertaken with low field NMR to follow droplet sizes and ... -
Novel Nuclear Magnetic Resonance Techniques To Assess the Wax Precipitation Evolution in Crude Oil Systems
Savulescu, George Claudiu; Simon, Sebastien Charles; Sørland, Geir Humborstad; Øye, Gisle (Peer reviewed; Journal article, 2022)Wax crystallization in cold environments constitutes one of the main causes for flow assurance problems during oil production. Several techniques, such as differential scanning calorimetry (DSC) or gas chromatography/mass ... -
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 ... -
The application of pulse field gradient (PFG) NMR methods to characterize the efficiency of separation of water-in-crude oil emulsions
Sørland, Geir Humborstad; Salomon Marques, Debora; Less, Simone; Vilagines, Regis (Journal article; Peer reviewed, 2018)Demulsification of water-in-crude oil emulsions is an essential and sometimes challenging procedure for crude oil processing facilities. Pulse field gradient (PFG) NMR techniques are known to monitor the dynamics of emulsion ...