Blar i NTNU Open på forfatter "Tranell, Gabriella"

Viser treff 61-80 av 93

    • Processing and Characterisation of Diatoms for Light Harvesting Materials in Solar Cells 

      Ottesen, Petter (Master thesis, 2011)
      By applying a texture to the front surface of solar cells, less light may be reflected and the incoming light may be given a longer path length inside the solar cell causing a better light absorbance for the solar cell. ...

    • Production of Titanium alloys via aluminothermic reduction 

      Fygle, Inger (Master thesis, 2020)
      Titan metall har blitt produsert og fremstilt på kommersiell skala siden begynnelsen av 1950-tallet på grunn av dets unike egenskaper: (i) høyt styrke-til-vekt forhold, (ii) forhøyet smeltepunkt, og (iii) utmerket ...

    • Pyrometallurgical Treatment of Apatite Concentrate with the Objective of Rare Earth Element Extraction: Part I 

      Tianming, Sun; Kennedy, Mark William; Yurramendi, Lourdes; Aldana, Jose; Del Rio, Carmen; Arnout, Sander; Tranell, Gabriella; Aune, Ragnhild Elizabeth (Journal article, 2017)
      Apatite, Ca5(PO4)3F, concentrate from LKAB in Kiruna, Sweden, has been characterized and pyrometallurgically treated using (i) silicon metal and fluxes to extract phosphorus and transition metals at 1600 °C (Part I ...

    • Pyrometallurgical Treatment of Apatite Concentrate with the Objective of Rare Earth Element Recovery: Part II 

      Kennedy, Mark William; Tianming, Sun; Yurramendi, Lourdes; Arnout, Sander; Aune, Ragnhild Elizabeth; Tranell, Gabriella (Journal article, 2017)
      Apatite, Ca5(PO4)3F, is a useful raw material for the production of both elemental phosphorus and phosphoric acid, and the mine tailings present at Luossavaara-Kiirunavaara AB (LKAB) in Kiruna, Sweden, represent a significant ...

    • Quartz Behavior in Si Production 

      Zhang, Xinhao (Master thesis, 2013)
      The results of this study show the main findings in this work. The points are summarized as follow:1.With the temperature increased, many cracks formed inside the quartz. When the temperature was approaching melting point, ...

    • Recovery and Utilisation of Kerf Waste from Silicon Wafering Process 

      Lim, Kevin (Master thesis, 2018)
      While the green credentials of solar photovoltaic technology are often touted, there is still substantial room for improvement in the silicon solar photovoltaic value chain. In particular, silicon kerf which is a byproduct ...

    • Recovery of Iron and Aluminum from Bauxite Residue by Carbothermic Reduction and Slag Leaching 

      Ekstrøm, Kai Erik; Bugten, Andreas Voll; Eijk, Casper van der; Lazou, Adamantia; Balomenos, E.; Tranell, Gabriella (Peer reviewed; Journal article, 2021)
      The recovery of major components of bauxite residue by carbothermic reduction at 1550–1750 °C and subsequent slag leaching in a Na3CO3(aq) solution is studied. Iron recovers primarily to pig-iron and lime is added to tune ...

    • Recycling and Utilisation of Secondary Aluminium Products 

      Meling, Ingrid (Master thesis, 2018)
      Efficient utilisation of secondary aluminium products is increasingly important as the energy consumption and CO2 emissions are greatly reduced by recycling compared to primary production. The aim of this study was to ...

    • Recycling of the Rare Earth Oxides from Spent Rechargeable Batteries Using Waste Metallurgical Slags 

      Tang, Kai; Ciftja, Arjan; Eijk, Casper van der; Wilson, Shawn C.; Tranell, Gabriella (Journal article; Peer reviewed, 2013)
      A high temperature process for recycling spent nickel-metal hydride rechargeable batteries has been recently developed at SINTEF/NTNU. The spent battery modules were first frozen with liquid nitrogen for the de-activation ...

    • Refining Kinetics of the SisAl Silicon Alloy 

      Sørli, Fredrik (Master thesis, 2023)
      SisAl Pilot-prosjektet er dedikert til å utforske en mer miljøvennlig tilnærming til produksjon av silisium. Hovedmålet er å redusere karbonavtrykket og energiforbruket forbundet med tradisjonelle metoder ved å erstatte ...

    • Removal of Aluminium Carbide from Liquid Aluminium 

      Aarnæs, Trygve Storm (Master thesis, 2018)
      Aluminium carbide (Al4C3) inclusions are a common type of impurity found in aluminium alloys. Currently aluminium carbide cannot be efficiently removed due to its small particle size and wetting properties. The small carbide ...

    • Rheological properties of Al2O3–CaO–SiO2 slags 

      Tang, Kai; Eijk, Casper van der; Gouttebroze, Sylvain; Du, Qiang; Safarian, Jafar; Tranell, Gabriella (Peer reviewed; Journal article, 2022)
      The Al2O3–CaO–SiO2 ternary is a basic oxide system relevant for the Pedersen alumina production process and for aluminothermic silicon production with low environmental impact using secondary aluminium and silica raw ...

    • Sampling Procedure, Characterization, and Quantitative Analyses of Industrial Aluminum White Dross 

      Solem, Cathrine Kyung Won; Deledda, Stefano; Tranell, Gabriella; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2022)
      Up to 10% of all metallic aluminum (Al) produced is lost due to dross generation during production. It also causes an environmental problem due to hazardous waste generation following treatment, as well as toxic gas ...

    • Scaling in the Si Off-gas Systems - The Effect of Alkali Content 

      Hauge, Erlend Gustav Rikardsen (Master thesis, 2022)
      Hensikten med denne masteren har vært å undersøke komposisjonen av avsetningen som finnes i pipen på silisiums og ferrosilisiums verk. Resultatet vil kunne brukes til å oppnå en bedre forståelse av hvilke faktorer som ...

    • Shape Factor Effect on Inclusion Sedimentation in Aluminum Melts 

      Gökelma, Mertol; Einarsrud, Kristian Etienne; Tranell, Gabriella; Friedrich, Bernd (Journal article; Peer reviewed, 2020)
      The quality requirements of aluminum products are steadily increasing, and the presence of non-metallic inclusions have a large impact on the quality of aluminum products. Sedimentation is a widely applied technique to ...

    • Silicon purification by acid leaching and slag refining techniques 

      Zhu, Mengyi (Doctoral theses at NTNU;2021:117, Doctoral thesis, 2021)
      Solar energy has become the most popular and fastest-growing renewable energy resource worldwide. However, it still requires the current solar-grade silicon (SoG-Si, purity 99.9999%) production with a larger manufacturing ...

    • SILICON PURIFICATION THROUGH MAGNESIUM ADDITION AND ACID LEACHING 

      Safarian, Jafar; Tranell, Gabriella (Chapter, 2016)
      Silicon is the dominant material in photovoltaic devices and with regard to the PV market growth, the demand for solar grade silicon feedstock is expected to be high in the future. Although solar silicon is currently ...

    • Surface treatment of high performance multicrystalline silicon wafers 

      Andersen, Gina Opstad (Master thesis, 2018)
      This master thesis investigates the properties of high performance multicrystalline silicon, and the production line of black multicrystalline silicon solar cells with PERC architecture. Possible solutions to achieve ...

    • Tapping Gas from the Silicon Submerged Arc Furnace: An Industrial Measurement Campaign 

      Andersen, Vegar; Gaertner, Heiko; Grådahl, Svend; Ksiazek, Michal Tomasz; Einarsrud, Kristian Etienne; Tranell, Gabriella (Journal article; Peer reviewed, 2022)
      Producing high-silicon alloys in submerged arc furnaces (SAF) involves the generation of an intermediate process gas, consisting of silicon monoxide (SiO) and carbon monoxide (CO). Combustion of process gas from the taphole ...

    • The effect of compaction and thermal treatment in the recovery of coated aluminium scrap through FTIR off-gas analysis and remelting in molten heel 

      Høgåsen, Solveig (Master thesis, 2022)
      Økt fokus på global oppvarming har medført at alle teknologiske sektorer ser etter løsninger på problemer tilknyttet energibruk og utslipp. Aluminiumsektoren har de siste tiårene opplevd en økt primærproduksjon noe som ...