Blar i NTNU Open på forfatter "Tranell, Gabriella"
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A Combined Upcycling Route for Silicon Powder Waste and a Silicon Alloy
Meling, Mathilde (Master thesis, 2023)Silisium er et avgjørende element i produkter som omgir oss hver dag, som solcellepaneler, elektronikk og i kjemiske produkter. Behovet for en bærekraftig og sirkulær verdikjede for silisium er presserende. Dagens produksjon ... -
A Method for Assessment of Recyclability of Aluminum from Incinerated Household Waste
Gökelma, Mertol; Meling, Ingrid; Soylu, Ece; Kvithyld, Anne; Tranell, Gabriella (Journal article; Peer reviewed, 2019)Aluminum is widely used in daily household consumable goods such as food and drink packaging materials, storage containers, etc. The disposal of such goods into household waste means that this waste stream contains a ... -
A thermodynamic assessment of the Nd-C system
Bian, Yuyang; Tang, Kai; Tranell, Gabriella (Journal article; Peer reviewed, 2015)The Nd–C binary system has been assessed based on the experimental investigation, thermodynamic calculations and the literature survey. The intermediate compounds Nd2C3 and βNdC2 (high-temperature form of NdC2 phase) were ... -
B diffusion in slag during slag refining for solar grade silicon
Zhang, Shuang (Master thesis, 2011)Mass transfer rate of B during slag refining has been investigated in the resistance tube furnace at temperature 1600 ºC and the mass transfer coefficients of B have been determined. The values of mass transfer coefficients ... -
Behavior of Al4C3 Particles During Flotation and Sedimentation in Aluminum Melts
Gökelma, Mertol; Aarnæs, Trygve Storm; Maier, Jürgen; F. Renkel, Maria; Ekstrøm, Kai Erik; Friedrich, Bernd; Tranell, Gabriella (Peer reviewed; Journal article, 2021)Al4C3 particles form during the primary production of aluminum via molten salt electrolysis due to the carbon solubility and direct contact between bath, metal, and carbon anodes. Additional Al4C3 may form during melt ... -
Behaviour of Aluminium Carbide in Al-melts during Re-melting
Gökelma, Mertol; Aarnæs, Trygve Storm; Maier, Jürgen; Friedrich, Bernd; Tranell, Gabriella (Journal article; Peer reviewed, 2019)The presence of non-metallic inclusions in aluminium has become a more critical issue with increasing demands on surface quality and low final wall thicknesses of products. Aluminium carbide particles form during the primary ... -
BORON REMOVAL FROM MOLTEN SILICON BY GAS BLOWING USING DIFFERENT GAS MIXTURES
Sanna, Claudio (Master thesis, 2016)- -
Boron Removal from Silicon by Humidified Gases
Safarian-Dastjerdi, Jafar; Tang, Kai; Hildal, Kjetil; Tranell, Gabriella (Journal article; Peer reviewed, 2014)Boron (B) is one of the most problematic impurities to remove from metallurgical grade silicon in the production of more pure solar grade silicon (SoG-Si). In the present work, recent progresses in the application of ... -
Boron Removal from Silicon by Moisturized Gases
Safarian, Jafar; Sana, Claudio; Tranell, Gabriella (Chapter, 2017)The photovoltaic (PV) industry is in rapid growth and a large supply of PV feedstock materials must be provided to maintain this growth. Since silicon is still the dominant material for the fabrication of solar cells, ... -
BORON REMOVAL FROM SILICON USING GAS REFINING AND DIFFERENT CRUCIBLE MATERIALS
Bhat, Akshay (Master thesis, 2016)- -
Carbon Behaviour during Si Production
Jin, Zhejun (Master thesis, 2013)First, the carbon content decreases with the increasing of silicon content in silicon phases. Second, the carbon content has no obvious trend in ferrosilicon phases. Third, the carbon element can be formed as silicon carbide ... -
Characteristic properties and recyclability of the aluminium fraction of MSWI bottom ash
Gökelma, Mertol; Vallejo-Olivares, Alicia; Tranell, Gabriella (Peer reviewed; Journal article, 2021)The increasing use of aluminimum in packaging applications results in many different aluminium-based products ending up in consumer mixed-waste bins. This waste is typically incinerated, generating an aluminium-containing ... -
Characterization and recovery of rare earth elements from electronic scrap
Bristøl, Lene Marie Lysgaard (Master thesis, 2012)The rare earth elements are a group of 17 elements consisting of the lantahnide series, scandium and yttrium. The application with the largest rare earth consumption is the permanent rare earth magnets. The neodymium-iron-boron ... -
Characterization of Structure and Optical Properties of Diatoms for improved Solar Cell Efficiency
Noren, Anne Kirsti (Master thesis, 2011)Interest in renewable energy resources has increased in recent years, and solar cells are one of the areas that have been subject to intensive research. For solar energy to develop into a competitive alternative to fossil ... -
Compaction of aluminium foil and its effect on oxidation and recycling yield
Vallejo-Olivares, Alicia; Philipson, Harald; Gökelma, Mertol; Roven, Hans Jørgen; Furu, Trond; Kvithyld, Anne; Tranell, Gabriella (Peer reviewed; Journal article, 2021)One of the problems when recycling aluminium is its oxidation and consequent metal loss. This is especially critical for the thin sheet/foil materials used for food packaging applications. Compacting the scrap into briquettes ... -
Composition and Surface Modifications of Silica Structures in Diatiom Frustules by Incorporation of Functional Oxides and Nitride Formation
Ødegård, Ivar Andre (Master thesis, 2012)Renewable energy production featuring silicon photovoltaic solar cells are of considerable interest to reduce pollution and related environmental changes. Improvements in efficiency along with reductions in cost are key ... -
Continued study to aluminothermic reduction process for silicon production
Simkhada, Nishan (Master thesis, 2022)Hovedmålet med denne oppgaven var å undersøke effekten av understøkiometrisk reduksjonsmiddeltilsetning i silikabasert slagg under aluminotermisk reduksjonsprosess. Produksjon av Si med mindre Ca-innhold har vært et av ... -
Distribution of Aluminum and Calcium between Silicon and CaO-Al2O3-SiO2 Slags at 1650 °C
Hassan, Safia (Master thesis, 2020)Hovedformålet med oppgaven var å undersøke likevekten mellom silisium (Si) og calcia-alumina (CaO-Al2O3) slagger. Ved å variere forholdet mellom metall og slagg i dette systemet vil det ideelt sett bli en linje på i den ... -
Distribution of Phosphorus between FeSi/Si and CaO-SiO2 Slags at 1600o C
Kvitastein, Nina (Master thesis, 2017)The aim of this thesis was to determine data for the phosphorus(P) distribution coefficients between ferrosilicon(FeSi) or silicon(Si) and calcia-silica(CaO SiO2) slags. The work was carried out due to inconsistencies ... -
Effect of Compaction and Thermal De-coating Pre-treatments on the Recyclability of Coated and Uncoated Aluminium
Vallejo-Olivares, Alicia; Høgåsen, Solveig; Kvithyld, Anne; Tranell, Gabriella (Journal article, 2022)Scrap pre-treatments, such as compaction and thermal de-coating, are standard industrial practices for recycling aluminium post-consumer scrap. This study compares the recyclability of a coated and uncoated 8111 alloy under ...