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    • Gas Flow and Pressure Drop in Charge Material in Silicon Production 

      Ringdalen, Eli; Einarsrud, Kristian Etienne; Nordhus, Astrid (Peer reviewed; Journal article, 2022)
      Gassing, outbursts of high-rate gas flows through the taphole, is a phenomenon that sometimes occurs during tapping of silicon furnaces. In addition to being an HSE challenge, this might also affect the tapping, while the ...

    • Gas switching reforming (GSR) for power generation with CO2 capture: Process efficiency improvement studies 

      Nazir, Shareq Mohd; Cloete, Jan Hendrik; Cloete, Schalk Willem Petrus; Amini, Shahriar (Peer reviewed; Journal article, 2019)
      This paper presents the process improvement studies of a combined cycle power plant integrated with a novel gas switching reforming (GSR) process for hydrogen production with integrated CO2 capture. The overall process is ...

    • Gas Switching Reforming (GSR) for syngas production with integrated CO2 capture using iron-based oxygen carriers 

      Zaabout, Abdelghafour; Dahl, Paul Inge; Ugwu, Ambrose; Tolchard, Julian R; Cloete, Schalk Willem Petrus; Amini, Shahriar (Peer reviewed; Journal article, 2019)
      The process behavior of a Gas Switching Reforming (GSR) reactor was studied using three different iron-based oxygen carrier materials: Iron-oxide on Alumina, Iron-Nickel oxide on Alumina and Iron-Ceria on Alumina. It was ...

    • Gas switching reforming for flexible power and hydrogen production to balance variable renewables 

      Szima, Szabolcs; Nazir, Shareq Mohd; Cloete, Schalk Willem Petrus; Amini, Shahriar; Fogarasi, Szabolcs; Cormos, Ana-Maria; Cormos, Calin-Cristian (Peer reviewed; Journal article, 2019)
      Variable renewable energy (VRE) is expected to play a major role in the decarbonization of the electricity sector. However, decarbonization via VRE requires a fleet of flexible dispatchable plants with low CO2 emissions ...

    • Gas Switching Reforming for syngas production with iron-based oxygen carrier-the performance under pressurized conditions 

      Ugwu, Ambrose; Zaabout, Abdelghafour; Tolchard, Julian R; Dahl, Paul Inge; Amini, Shahriar (Peer reviewed; Journal article, 2019)
      A four-stage Gas Switching Reforming for syngas production with integrated CO2 capture using an iron-based oxygen carrier was investigated in this study. The oxygen carrier was first reduced using dry methane, where high ...

    • Gas switching technology: Economic attractiveness for chemical looping applications and scale up experience to 50 kWth 

      Ugwu, Ambrose; Arnaiz del Pozo, Carlos; Zaabout, Abdelghafour; Nazir, Shareq Mohd; Kalendar, Nimet Uzun; Cloete, Schalk Willem Petrus; Szima, Szabolcs; Fogarasi, Szabolcs; Donat, Felix; van Diest, Geert; Cloete, Jan Hendrik; Jiménez Álvaro, Ángel; Albertsen, Knuth; Cormos, Ana-Maria; Cormos, Calin-Cristian; Amini, Shahriar (Peer reviewed; Journal article, 2022)
      Gas switching technology (GST) was introduced to facilitate operation and scale-up of pressurized chemical looping-based technologies thus bringing the expected benefits of reducing costs and energy penalty of CO2 capture. ...

    • Gaseous reduction of Mn ores in CO-CO2 atmosphere 

      Larssen, Trine Asklund; Tangstad, Merete; Kero, Ida (The Minerals, Metals & Materials Series;2367-1181, Chapter, 2018)
      The efficiency in production of manganese ferroalloys is dependent on the gaseous reduction of the higher manganese oxides in the ores used as raw materials. The materials, descending in the furnace, will meet the furnace ...

    • Gassing During Tapping of Silicon 

      Vachaparambil, Kurian J.; Panjwani, Balram; Olsen, Jan Erik (Peer reviewed; Journal article, 2022)
      During tapping of metal from silicon furnaces, a significant amount of gas is often released through the tap-hole. The gas is combustible, and a flame jet is created which poses a safety threat to operators. Due to the ...

    • The generality of the standard 2D TFM approach in predicting bubbling fluidized bed hydrodynamics 

      Cloete, Schalk Willem Petrus; Zaabout, Abdelghafour; Johansen, Stein Tore; Annaland, MV; Gallucci, F; Amini, Shahriar (Peer reviewed; Journal article, 2013)
      Hydrodynamic simulations of a pseudo-2D bubbling fluidized bed were carried out and compared to experiments conducted over a wide range of flow conditions. The primary purpose of this study was to assess the generality of ...

    • GHGT-12 Performance of the IGCC with distributed feeding of H2 in the gas turbine burner 

      Jordal, Kristin; Anantharaman, Rahul; Gruber, Andrea; Peters, Thijs; Henriksen, Partow Pakdel; Berstad, David Olsson; Bredesen, Rune (Peer reviewed; Journal article, 2014)
      A main hurdle for realizing the IGCC with CO2 capture is the lack of gas turbines capable of burning hydrogen in an environmental-friendly, yet energy-efficient manner. With currently proposed combustion schemes an efficiency ...

    • Global Assessment of Mycobacterium avium subsp. hominissuis Genetic Requirement for Growth and Virulence 

      Dragset, Marte Singsås; Ioerger, Thomas R.; Loevenich, Maja; Haug, Markus; Sivakumar, Niruja; Marstad, Anne; Cardona, Pere-Joan; Klinkenberg, Geir; Rubin, Eric J.; Steigedal, Magnus; Flo, Trude Helen (Peer reviewed; Journal article, 2019)

    • Global Circular Economy Scenario in a Multiregional Input-Output Framework 

      Wiebe, Kirsten Svenja; Harsdorff, Marek; Montt, Guillermo; Silva Simas, Moana; Wood, Richard (Journal article; Peer reviewed, 2019)
      In a resource-constrained world of an estimated 10 billion people in 2050 with the same material aspirations of today’s high-income nations, there is no question: The future economy will need to be circular. From a policy ...

    • Governing physics of shallow and deep subsea gas release 

      Olsen, Jan Erik; Skjetne, Paal (SINTEF Proceedings;1, Chapter; Conference object; Peer reviewed, 2015)
      A modelling concept for studying the resulting bubble plume from a subsea gas release is presented. Simulation results show good consistency with available experimental data. The modelling concept is applied to assess the ...

    • Grain boundary corrosion in TiO2 bone scaffolds doped with group II cations 

      Klemm, Anne; Gomez-Florit, Manuel; Carvalho, Patricia A.; Wachendörfer, Mattis; Gomes, Manuela E.; Haugen, Håvard Jostein; Tiainen, Hanna (Journal article; Peer reviewed, 2019)

    • Grain boundary segregation in Pd-Cu-Ag alloys for high permeability hydrogen separation membranes 

      Løvvik, Ole Martin; Zhao, Dongdong; Li, Yanjun; Bredesen, Rune; Peters, Thijs (Peer reviewed; Journal article, 2018)
      Dense metal membranes that are based on palladium (Pd) are promising for hydrogen separation and production due to their high selectivity and permeability. Optimization of alloy composition has normally focused on bulk ...

    • Grain boundary structures and their correlation with intergranular corrosion in an extruded Al-Mg-Si-Cu alloy 

      Lervik, Adrian; Wenner, Sigurd; Lunder, Otto; Marioara, Calin Daniel; Holmestad, Randi (Peer reviewed; Journal article, 2020)
      A detailed analysis of grain boundaries in a highly textured Al-Mg-Si-Cu alloy is presented in this work. Electron backscatter diffraction demonstrates the presence of three main categories of grain boundaries in addition ...

    • Grain refinement of aluminium welds by Ti, TiB2, and TiC filler wire inoculation 

      Kirkbakk, Kjell Martin; Marhaug, Nikolai; Langelandsvik, Geir; Werenskiold, Jens Christofer (Peer reviewed; Journal article, 2023)
      A fine-grained fusion zone characterises a tough aluminium weld. To improve the solidification characteristics and refine the grains in aluminium welding, different inoculation particle combinations were introduced to the ...

    • Graphene oxide-based silico-phosphate composite films for optical limiting of ultrashort near-infrared laser pulses 

      Petris, Adrian; Vasiliu, Ileana Cristina; Gheorghe, Petronela; Iordache, Ana Maria; Ionel, Laura; Rusen, Laurentiu; Iordache, Stefan; Elisa, Mihai; Trusca, Roxana; Ulieru, Dumitru; Etemadi, Samaneh; Wendelbo, Rune; Yang, Juan; Thorshaug, Knut (Peer reviewed; Journal article, 2020)
      The development of graphene-based materials for optical limiting functionality is an active field of research. Optical limiting for femtosecond laser pulses in the infrared-B (IR-B) (1.4–3 μm) spectral domain has been ...

    • Graphene-Based Transparent Conducting Substrates for GaN/AlGaN Nanocolumn Flip-Chip Ultraviolet Light-Emitting Diodes 

      Liudi Mulyo, Andreas; Mukherjee, Anjan; Høiaas, Ida Marie; Ahtapodov, Lyubomir; Nilsen, Tron Arne; Toftevaag, Håvard Hem; Vullum, Per Erik; Kishino, Katsumi; Weman, Helge; Fimland, Bjørn-Ove (Peer reviewed; Journal article, 2021)
      Flip-chip ultraviolet light-emitting diodes based on self-assembled GaN/AlGaN nanocolumns have been fabricated, exploiting single-layer graphene not only as a growth substrate but also as a transparent conducting electrode. ...

    • Graphite crucible interaction with Fe–Si–B phase change material in pilot-scale experiments 

      Jiao, Jianmeng; Tangstad, Merete; Jayakumari, Sethulakshmy; Wallin, Maria (Peer reviewed; Journal article, 2023)
      Fe–26Si–9B alloy is a promising high temperature phase change material (HTPCM), due to its high heat of fusion, small volumetric change, abundance, and low cost. Additionally, graphite has been identified as a promising ...