Blar i NTNU Open på forfatter "Einarsrud, Kristian Etienne"

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    • A Comparative Study of Different CFD-codes for Fluidized Beds 

      Daun, Per Fredrik (Master thesis, 2023)
      Fluidiserte senger er viktige prosesser med mange bruksområder i ulike industrier. Ett av bruksområdene er som en tørrskrubber for å behandle avgass fra aluminiumsproduksjon. Økt etterspørsel etter aluminium i verden betyr ...

    • A Model Based Parametric Study of Alumina Feeding and Dissolution 

      Aase, Simen; Bekkevoll, Simen; Forberg, Sigmund A.K. (Bachelor thesis, 2020)
      Alumina blir brukt som råmateriale i den energikrevende Hall-Hèroult-prosessen for produksjon av aluminium. I denne prosessen blir aluminapulver matet til et kryolittbad med jevne mellomrom. Det utfordrende miljøet i den ...

    • A Treatise on Interpolar Transport Phenomena 

      Einarsrud, Kristian Etienne (Doktoravhandlinger ved NTNU, 1503-8181; 2012:201, Doctoral thesis, 2012)
      This thesis contributes to the understanding of mechanisms for mass transport in aluminium electrolysis cells. Fundamental studies are undertaken of ow patterns and mass transport in the interpolar region under various ...

    • Alumina Dissolution in Cryolite Melts - Formation and Behavior of Rafts 

      Gylver, Sindre Engzelius (Master thesis, 2018)
      Alumina is the raw-material used for aluminum production in the Hall-Héroult process. Though the process is used for several years, some phenomena is not fully investigated yet. One of those is the formation of floating ...

    • Alumina feeding and raft formation: Raft collection and process parameters 

      Gylver, Sindre Engzelius; Omdahl, Nina Helene; Prytz, Ann Kristin; Meyer, Astrid Johanne; Lossius, Lorentz Petter; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2019)
      Alumina, alongside with electricity and carbon, is the raw material used for production of aluminium in the Hall-Héroult process. An efficient dissolution process is important to acquire stable conditions for the cell, ...

    • An experimental study of bubble behaviour at liquid-liquid interfaces 

      Moe, Kristian Ringheim (Master thesis, 2022)
      I metallindustri er tapping en prosess som kan tilføre mye luft til det smeltede metallet og flytende slagget. Dette kan medføre transport av metall inn i slagget via stigende metalldekkede bobler. Målet med denne oppgaven ...

    • Analysis of nitro- and oxy-PAH emissions from a pilot scale silicon process with flue gas recirculation 

      Arnesen, Kamilla; Andersen, Vegar; Jakovljevic, Katarina; Enge, Ellen Katrin; Gaertner, Heiko; Aarhaug, Thor Anders; Einarsrud, Kristian Etienne; Tranell, Maria Gabriella (Peer reviewed; Journal article, 2023)

    • Analysis of Polycyclic Aromatic Hydrocarbon Emissions from a Pilot Scale Silicon Process with Flue Gas Recirculation 

      Arnesen, Kamilla; Vachaparambil, Kurian Jomy; Vegar, Andersen; Panjwani, Balram; Jakovljevic, Katarina; Enge, Ellen Katrin; Gaertner, Heiko; Aarhaug, Thor Anders; Einarsrud, Kristian Etienne; Tranell, Maria Gabriella (Peer reviewed; Journal article, 2023)
      Flue gas recirculation (FGR) is a method used in several industries to control emissions and process conditions, such as NOx reduction and temperature levels, and increase the CO2 concentration in the off-gas, to be better ...

    • Assessment of Established and New Separation Methods for Water-in-Oil Emulsions 

      Woxholt, Eirik Giil; Stavrum, Jørgen Sivertsen (Bachelor thesis, 2020)
      Råolje er en kjemisk blanding av hydrokarboner, heteroatomer, metalliske forbindelser og mange komplekse organiske forbindelser. Sammensetningen av disse varierer avhengig av hvor og når hentet, samt flere ander faktorer. ...

    • Bubble Phenomena and Bubble Properties for Horizontal and Vertical Carbon Anode Surfaces in Cryolite Melt Applying a See‐Through Cell 

      Stanic, Nikolina; Martinez, Ana Maria Cuellar; Einarsrud, Kristian Etienne; Sandnes, Espen (Peer reviewed; Journal article, 2021)
      Gas bubble behavior on a carbon anode in a cryolite melt has been studied using a see-through cell. The phenomena studied have been growth, coalescence, detachment, and wetting during electrolysis. The surface orientation ...

    • CFD Modelling of Alumina Feeding 

      Einarsrud, Kristian Etienne; Gylver, Sindre Engzelius; Manger, Eirik (Journal article, 2018)
      The dissolution and distribution of alumina in molten cryolite bath is a complex process, involving heat and mass transfer, phase transition and dynamics for a particle population with variable size and properties. Although ...

    • Characterization of industrial hydrocarbon samples from anode baking furnace off-gas treatment facility 

      Arnesen, Kamilla; Albinet, Alexandre; Chatellier, Claudine; Huynh, Nina; Aarhaug, Thor Anders; Einarsrud, Kristian Etienne; Tranell, Maria Gabriella (Peer reviewed; Journal article, 2023)
      Polycyclic aromatic hydrocarbons (PAHs) are naturally present in raw materials used as a binder in prebaked anodes for electrolysis of aluminum. Green anodes are baked to about 1200 °C through a cycle of 14–17 days where ...

    • A Comparative Study of Different CFD Codes for Fluidized Beds 

      Kusriantoko, Parindra; Daun, Per Fredrik; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2024)
      Fluidized beds are pivotal in the process industry and chemical engineering, with Computational Fluid Dynamics (CFD) playing a crucial role in their design and optimization. Challenges in CFD modeling stem from the scarcity ...

    • Comparison of Surface Tension Models for the Volume of Fluid Method 

      Vachaparambil, Kurian J.; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2019)
      With the increasing use of Computational Fluid Dynamics to investigate multiphase flow scenarios, modelling surface tension effects has been a topic of active research. A well known associated problem is the generation of ...

    • Comparison of Surface Tension Models for the Volume of Fluid Method 

      Vachaparambil, Kurian J.; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2019)
      With the increasing use of Computational Fluid Dynamics to investigate multiphase flow scenarios, modelling surface tension effects has been a topic of active research. A well known associated problem is the generation of ...

    • Computational Fluid Dynamics Modeling of the Resistivity and Power Density in Reverse Electrodialysis: A Parametric Study 

      Jalili, Zohreh; Burheim, Odne Stokke; Einarsrud, Kristian Etienne (Peer reviewed; Journal article, 2020)
      Electrodialysis (ED) and reverse electrodialysis (RED) are enabling technologies which can facilitate renewable energy generation, dynamic energy storage, and hydrogen production from low-grade waste heat. This paper ...

    • Computational Modelling of Mass Transfer in Molten Salt Electrolyte for Na-Zn Liquid Metal Batteries 

      Koseniuk, Kseniia (Master thesis, 2023)
      Flytende metall-batterier (eller FMB-er) er en fremvoksende batteriteknologi som blir stadig mer relevant for storskala energilagring på strømnettet. Denne lagringen kan bidra til å redusere variasjonene i strømforsyningen ...

    • A continuous multiphase model for liquid metal batteries 

      Godinez Brizuela, Omar Emmanuel; Duczek, Carolina; Weber, Norbert; Nash, William; Sarma, Martins; Einarsrud, Kristian Etienne (Peer reviewed; Journal article, 2023)
      Liquid metal batteries (LMBs) are a promising candidate for large-scale stationary storage of renewably generated energy. Their Earth-abundant electrode materials and highly conductive molten salt electrolytes confer the ...

    • Dispersion and dissolution of alumina in cryolite melts: impact of sulfur and carbon on dissolution behavior in see through cell 

      Aulie, Vegard (Master thesis, 2021)
      Aluminium blir produsert industrielt ved hjelp av Hall-Herôult metoden. Denne metoden produserer flytende aluminium fra aluminiumoksid (kalt alumina) og karbon i ett bad med flytende kryolitt. Denne prosessen krever høy ...

    • Dissolution Characteristics and Concentration Measurements of Alumina in Cryolite Melts 

      Bracamonte, Luis Carlos Izaguirre; Aulie, Vegard; Rosenkilde, Christian; Einarsrud, Kristian Etienne; Sandnes, Espen (Peer reviewed; Journal article, 2021)
      Alumina dissolution is one of the most important processes in the Hall-Héroult process. In this work, video recording using a high-speed camera and a see-through cell and electromotive force (emf) based alumina sensor ...