Blar i NTNU Open på forfatter "Hjartnes, Tomas"
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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 ... -
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, ...