Browsing NTNU Open by Author "Mokkelbost, Tommy"

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    • A concept for electrowinning of aluminium using depolarized gas anodes 

      Mokkelbost, Tommy; Kjos, Ole Sigmund; Paulsen, Ove Bjørn; Øye, Bjarte Arne; Gudbrandsen, Henrik; Ratvik, Arne Petter; Haarberg, Geir Martin (Journal article; Peer reviewed, 2014)
      Aluminium is today commercially produced by the Hall-Héroult process using consumable carbon anodes. Consumable anodes have some concerns such as CO2 emission, continuous anodecathode distance adjustments and replacements ...

    • Gas Anodes Made of Porous Graphite for Aluminium Electrowinning 

      Khalaghi, Babak; Gudbrandsen, Henrik; Kjos, Ole Sigmund; Osen, Karen Sende; Paulsen, Ove; Mokkelbost, Tommy; Haarberg, Geir Martin (Journal article, 2017)
      One of the major downsides of the current aluminium production process is the high CO2 emission. One alternative is to replace the consumable carbon anodes with inert anodes so that oxygen evolves instead of CO2. Also PFC ...

    • Manufacturing of perovskite oxygen carriers by spray granulation for chemical looping combustion 

      Thoréton, Vincent; Darell, Ove; Spjelkavik, Aud I.; Sunding, Martin Fleissner; Mokkelbost, Tommy; Pishahang, Mehdi; Wiik, Kjell; Larring, Yngve (Journal article; Peer reviewed, 2017)
      Chemical looping combustion is a technology under development that allows power production with inherent separation of CO2 during fuel combustion. Its principle relies on oxygen carrier materials transporting oxygen from ...

    • Microstructural Stability of Tailored CaMn0.875−xFexTi0.125O3−δ Perovskite Oxygen Carrier Materials for Chemical Looping Combustion 

      Thoréton, Vincent; Pishahang, Mehdi; Mokkelbost, Tommy; Wiik, Kjell; Larring, Yngve (Journal article; Peer reviewed, 2017)
      CaMn1−xTixO3−δ are state-of-the-art perovskite-type oxygen-carrier materials (OCMs) used in gaseous fluidized-bed chemical looping combustion (CLC), which is currently undergoing upscaling and demo campaigns in several ...

    • Natural Gas Anodes for Aluminium Electrolysis in Molten Fluorides 

      Haarberg, Geir Martin; Khalaghi, Babak; Mokkelbost, Tommy (Journal article; Peer reviewed, 2016)
      Industrial primary production of aluminium has been developed and improved over more than 100 years. The molten salt electrolysis process is still suffering from low energy efficiency and considerable emissions of greenhouse ...

    • Natural Gas Anodes of Porous Graphite for Aluminium Electrolysis 

      Khalaghi, Babak (Doctoral theses at NTNU;2017:266, Doctoral thesis, 2017)
      Aluminium is the second metal produced in the world in terms of quantity. It is produced in a multistage process. First, aluminium ore is converted to pure aluminium oxide. The second stage is an electrolysis process. In ...

    • Porous Carbon Anodes for the Supply of Methane during Electrowinning of Aluminium 

      Khalaghi, Babak; Gudbrandsen, Henrik; Kjos, Ole Sigmund; Osen, Karen Sende; Mokkelbost, Tommy; Haarberg, Geir Martin (Chapter, 2016)
      One of the major downsides of the current aluminium production process is the high amount of CO2 e mission. One alternative is to replace the consumable carbon anodes with inert anodes so that oxygen evolves instead of CO2 ...

    • Silicon-carbon composite anodes from industrial battery grade silicon 

      Foss, Carl Erik Lie; Andersen, Hanne Flåten; Ulvestad, Asbjørn; Kirkengen, Martin; Vullum, Per Erik; Voje, Jorunn; Tronstad, Ragnar; Mokkelbost, Tommy; Mæhlen, Jan Petter (Journal article; Peer reviewed, 2019)
      In this work, silicon/carbon composites for anode electrodes of Li-ion batteries are prepared from Elkem’s Silgrain® line. Gentle ball milling is used to reduce particle size of Silgrain, and the resulting Si powder consists ...

    • Synthesis and Characterization of CeO2- and LaNbO4-based Ionic Conductors 

      Mokkelbost, Tommy (Doktoravhandlinger ved NTNU, 1503-8181; 2006:181, Doctoral thesis, 2006)
      Ceramic electrolytes that conduct either oxygen ions or protons at intermediate temperatures are important materials for use in e.g. solid oxide fuel cells, the prime candidate to produce electricity by electrochemical ...

    • Synthesis of Li-ion battery cathode materials by flame spray pyrolysis 

      Lobintsev, Vyacheslav (Master thesis, 2016)
      Li-ion batteries (LIBs) constitute the leading technology within power sources. They are used in hybrid and pure electric vehicles as well as portable electronics and at the present time surpassed other types of battery ...