Browsing Fakultet for naturvitenskap (NV) by Author "Haarberg, Geir Martin"
Now showing items 61-71 of 71
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Seebeck coefficients of cells with molten carbonates relevant for the metallurgical industry
Kang, X.; Børset, Marit Takla; Burheim, Odne Stokke; Haarberg, Geir Martin; Xu, Q.; Kjelstrup, Signe (Journal article; Peer reviewed, 2015)We report Seebeck coefficients of electrochemical cells with molten carbonate mixtures as electrolytes and carbon dioxide|oxygen electrodes. The system is relevant for use of waste heat and off-gases with concentration of ... -
The Study of Jarosite Waste Used for Suspension Electrolysis in Aqueous NaOH Electrolyte
Qin, Bo; Haarberg, Geir Martin (Peer reviewed; Journal article, 2022)Jarosite waste is normally generated from the purification process of zinc production. It contains many valuable elements such as zinc, lead, and especially iron. In the present study, jarosite waste was treated through ... -
Synthesis of a (Ti, Mo)B<inf>2</inf> coating by electro-codeposition in NaCl–KCl–AlCl<inf>3</inf>–MoO<inf>3</inf> melt containing TiB<inf>2</inf> nanoparticles
Jin, Weiliang; Pang, Jie; Kou, Qian; Ge, Chuntao; Zhu, Hongmin; Haarberg, Geir Martin; Xiao, Saijun; Zhang, Jun (Peer reviewed; Journal article, 2022)This paper demonstrates the availability of electro-codeposition (i.e., the simultaneous occurrence of electrophoretic deposition of nanoparticles and electrochemical deposition of metal ions) in molten salts without the ... -
The Behavior of Additives LiF, MgF2 and KF on Current Efficiency in Aluminium Electrolysis
Cui, Peng; Qin, Bo; Haarberg, Geir Martin (Journal article; Peer reviewed, 2019)The effects of LiF, MgF2 and KF additions to the electrolyte on current efficiency were investigated during aluminium electrolysis using base NaF−AlF3−Al2O3 system with a cryolite ratio of 2.5, 4% Al2O3 and 5% CaF2 at 980°C ... -
The durability of the thermally decomposed IrO2-Ta2O5 coated titanium anode in a sulfate solution
Xu, Wenting; Haarberg, Geir Martin; Seland, Frode; Sunde, Svein; Ratvik, Arne Petter; Holmin, Susanne; Afvander, Åsa; Gustavsson, John; Zimmerman, Erik; Årke, Torjus (Journal article; Peer reviewed, 2019)In this work, series of IrO2-Ta2O5 anodes were investigated. The catalytic activity towards oxygen evolution reaction (OER) of these anodes are determined by calcination temperature, coating loading (coating thickness), ... -
The IrO2-Ta2O5 Coated Titanium Anode for Oxygen Evolution Reaction in Sulfate Solution
Xu, Wenting (Doctoral theses at NTNU;2018:320, Doctoral thesis, 2018)Titanium substrates coated with a conductive layer of metal oxides are well known gas evolving electrodes in the metal electrowinning industry, so-called dimensionally stable anodes (DSAs). DSA electrodes display better ... -
Thermal Conductivity of Molten Carbonates with Dispersed Solid Oxide from Differential Scanning Calorimetry
Kandhasamy, Sathiyaraj; Støre, Anne; Haarberg, Geir Martin; Kjelstrup, Signe; Solheim, Asbjørn (Journal article; Peer reviewed, 2019)Recently, there has been a noticeable increase in the applications of composite mixtures containing molten salt and solid oxide for thermal energy conversion and storage systems. This highlights that thermal conductivity ... -
Thermoelectrochemical Cell with Molten Carbonate Electrolyte
Haarberg, Geir Martin; Kandhasamy, Sathiyaraj; Kjelstrup, Signe Helene; Solheim, Asbjørn (Journal article, 2017)Industrial processes for production of metals and alloys by metallurgical and electrochemical methods generate a lot of heat due to irreversible losses. The waste heat should be used to generate electricity. Commercial ... -
Trends and Challenges for Electrowinning of Aluminium and Magnesium from Molten Salt Electrolytes
Haarberg, Geir Martin (Peer reviewed; Journal article, 2020)Modern aluminium producing cells are operating at ~955–965 °C. The current efficiency with respect to aluminium can be as high as 96% and the corresponding energy consumption may be ~13 kWh/kg Al and higher in cells running ... -
Vapour Pressure of Bi above Bi-Ti Alloys by Transpiration Method
Thomassen, Nina Lu (Master thesis, 2017)Titanium is an attractive metal with wide-ranging applications due to its properties. Titanium is one of the most corrosion resistant metals with the highest strength-to-weight ratio. The only industrial production route ... -
Wettable TiB<inf>2</inf> Cathode for Aluminum Electrolysis: A Review
Padamata, Sai Krishna; Singh, Kamaljeet; Haarberg, Geir Martin; Saevarsdottir, Gudrun (Peer reviewed; Journal article, 2022)Titanium diboride (TiB2) is considered a promising material for wettable cathodes in aluminum electrolysis. The demand for wettable cathodes is associated with the development of inert anode technologies to eliminate CO2 ...