• A XANES Study of Sulfur Speciation and Reactivity in Cokes for Anodes Used in Aluminum Production 

      Jahrsengene, Gøril; Wells, Hannah C.; Rørvik, Stein; Ratvik, Arne Petter; Haverkamp, Richard G.; Svensson, Ann Mari (Journal article; Peer reviewed, 2018)
      Availability of anode raw materials in the growing aluminum industry results in a wider range of petroleum cokes being used to produce carbon anodes. The boundary between anode grade cokes and what previously was considered ...
    • An EXAFS and XANES Study of V, Ni, and Fe Speciation in Cokes for Anodes Used in Aluminum Production 

      Jahrsengene, Gøril; Wells, Hannah C.; Sommerseth, Camilla; Ratvik, Arne Petter; Lossius, Lorentz Petter; Sizeland, Katie H.; Kappen, Peter; Svensson, Ann Mari; Haverkamp, Richard G. (Journal article; Peer reviewed, 2019)
      Lower-quality petroleum coke with higher levels of sulfur and metal impurities will have to be used for the manufacturing of anodes for aluminum production in the future. The sulfur and metallic impurities affect the anode ...
    • Bio-Binders and its Carbonization and Interaction with Petroleum Coke during Baking 

      Jahrsengene, Gøril; Rørvik, Stein; Støre, Anne; Wang, Liang; Skreiberg, Øyvind (Peer reviewed; Journal article, 2022)
      To reduce the carbon footprint in aluminium production, bio-based binders are suggested to replace some or all coal tar pitch in the carbon anodes. In this study, bio-binders based on Norwegian spruce and birch woods were ...
    • Circular recycling concept for silver recovery from photovoltaic cells in Ethaline deep eutectic solvent 

      Lemoine, Charly; Petit, Yann; Karaman, Thomas; Jahrsengene, Gøril; Martinez Cuellar, Ana Maria; Benayad, Anass; Billy, Emmanuel (Peer reviewed; Journal article, 2024)
      Reducing the number of stages, energy costs and carbon footprint of recycling processes is essential to overcome environmental challenges. The interest in replacing the acids used in traditional hydrometallurgical methods ...
    • Effect of calcination temperature and time on properties of steam exploded pellets 

      Wang, Liang; Baldauf, Lukas; Skreiberg, Øyvind; Jahrsengene, Gøril; Rørvik, Stein (Peer reviewed; Journal article, 2022)
      Carbon anodes play an essential role in the production of primary aluminium. Currently fossil carbon is used for producing carbon anodes. Reducing the carbon utilization and replacing the fossil carbon are the main routes ...
    • Electrochemical Characterization of Silver and Iron Ions in Choline Chloride-Ethylene Glycol DES Electrolyte 

      Jahrsengene, Gøril; Wang, Zhaohui; Martinez Cuellar, Ana Maria (Peer reviewed; Journal article, 2024)
      Solar energy is growing to be an important source of renewable energy in the world, and the need of recycling processes to recover the strategic materials used for this technology are necessary. Ag may be recovered from ...
    • Electrochemical Recovery of Sb, Te, and In in Choline Chloride-Ethylene Glycol DES Electrolyte 

      Jahrsengene, Gøril; Wang, Zhaohui; Martinez Cuellar, Ana Maria (Peer reviewed, 2024)
      Choline Chloride-Ethylene Glycol DES mixture (ethaline) is considered a green solvent and is one of the most popular DESs to combine with electrochemical recovery processes due to its superior electrochemical properties ...
    • Investigation of gasification reactivity and properties of biocarbon at high temperature in a mixture of CO/CO2 

      Wang, Liang; Skreiberg, Øyvind; Smith, Nicholas Albert; Jayakumari, Sethulakshmy; Rørvik, Stein; Jahrsengene, Gøril; Turn, Scott (Peer reviewed; Journal article, 2023)
      Understanding the conversion behaviors of biocarbon under conditions relevant to industrial conditions is important to ensure proper and efficient utilization of the biocarbon for a dedicated metallurgical process. The ...
    • Investigation of the properties and reactivity of biocarbons at high temperature in mixture of CO/CO2 

      Wang, Liang; Skreiberg, Øyvind; Smith, Nicholas Albert; Jayakumari, Sethulakshmy; Jahrsengene, Gøril; Rørvik, Stein; Turn, Scott (Peer reviewed; Journal article, 2022)
      The CO2 gasification reactivity of biocarbons produced from birch wood chips under different atmospheric and pressurised conditions was investigated in this work. The reactivity tests were conducted by using a Macro-TGA ...
    • Optical and Electrochemical Characterisation of Carbon Anodes with Varying Porosity and Coke Quality 

      Jahrsengene, Gøril; Farahani, Mahyar; Linga, Hogne; Svensson, Ann Mari (Peer reviewed; Journal article, 2022)
      The performance of carbon anodes in aluminium production will depend on both the coke quality (impurities, structure) and the physical properties of the anode (density, permeability, electric resistivity). Here, a set of ...
    • Reactivity of coke in relation to sulfur level and microstructure 

      Jahrsengene, Gøril; Rørvik, Stein; Ratvik, Arne Petter; Lossius, Lorentz Petter; Haverkamp, Richard G.; Svensson, Ann Mari (The Minerals, Metals & Materials Series;2367-1181, Peer reviewed; Journal article, 2019)
      Shrinkage induced flow, thermo-solutal convection and equiaxed grain motion are the major transport mechanisms contributing to macrosegregation formation in aluminum alloys produced through Direct Chill casting. Experimental ...
    • Sustainable Metal Production: Use of Biocarbon and the Concern of Dusting 

      Jahrsengene, Gøril; Jayakumari, Sethulakshmy; Kero, Ida Teresia; Ringdalen, Eli (Chapter, 2023)
      The silicon and ferroalloy industries in Norway have traditionally relied on fossil carbon products as reductants for their respective process. Efforts to reduce fossil CO2 emissions by introducing biocarbon have already ...