Now showing items 790-809 of 1484

    • Jahn-Teller active fluoroperovskites ACrF3 (A=Na+, K+): Magnetic and thermo-optical properties 

      Bernal, Fabian Leonardo Martinez; Lundvall, Fredrik; Kumar, Susmit; Hansen, Per-Anders S.; Wragg, David S.; Fjellvåg, Helmer; Løvvik, Ole Martin (Peer reviewed; Journal article, 2021)
      Chromium (II) fluoroperovskites A CrF 3 ( A = Na + , K + ) are strongly correlated Jahn-Teller active materials at low temperatures. In this paper, we examine the role that the A -site ion plays in this family of ...
    • Jet fuel range hydrocarbon production from propanal: Mechanistic insights into active site requirement of a dual-bed catalyst 

      Yeboah, Isaac; Feng, Xiang; Wang, Gang; Rout, Kumar Ranjan; Cai, Zhenping; Duan, Xuezhi; Zhou, Xinggui; Chen, De (Peer reviewed; Journal article, 2020)
      Utilization of sustainable biomass to produce jet fuel range hydrocarbons is imperatively needed to mitigate CO2 emissions and to liberate the over-reliance on fossil resources. Using propanal as the feedstock, an excellent ...
    • Kinetic Analysis of Digestate Slow Pyrolysis with the Application of the Master-Plots Method and Independent Parallel Reactions Scheme 

      Bartocci, Pietro; Tschentscher, Roman; Stensrød, Ruth Elisabeth; Barbanera, Marco; Fantozzi, Francesco (Peer reviewed; Journal article, 2019)
      The solid fraction obtained by mechanical separation of digestate from anaerobic digestion plants is an attractive feedstock for the pyrolysis process. Especially in the case of digestate obtained from biogas plants fed ...
    • Kinetic interface condition phase diagram for the rapid solidification of multi-component alloys with an application to additive manufacturing 

      Du, Qiang; S. Azar, Amin; M'hamdi, Mohammed (Peer reviewed; Journal article, 2022)
      Solid-liquid Interface response function or the analysis of kinetic interfacial conditions under rapid solidification setting occupies a central role in solidification research. With the concepts of solute drag and solute ...
    • Kinetic modeling of dynamic changing active sites in a Mars-van Krevelen type reaction: Ethylene oxychlorination on K-doped CuCl2/Al2O3 

      Ma, Hongfei; Sollund, Erling S.; Zhang, Wei; Fenes, Endre; Qi, Yanying; Wang, Yalan; Rout, Kumar Ranjan; Fuglerud, Terje; Piccinini, Marco; Chen, De (Peer reviewed; Journal article, 2020)
      A kinetic model was developed by taking into account the dynamic nature of the active sites in Mars–van Krevelen type catalytic reactions to predict the evolution of the reactant and product composition in the gas phase ...
    • Kinetic Study of Butanol Production from Mixtures of Glucose and Xylose and Investigation of Different Pre-growth Strategies 

      Birgen, Cansu; Berglihn, Olaf Trygve; Preisig, Heinz A.; Wentzel, Alexander (Journal article; Peer reviewed, 2019)
      This study proposes a dynamic model that describes key characteristics of fermentative butanol production from glucose and xylose mixtures. The model has 12 parameters and incorporates noncompetitive inhibitory interaction ...
    • Kinetic study of vacuum evaporation of elements from ternary melts; case of dilute solution of P in Si-Al melts 

      Hoseinpur Kermani, Arman; Tang, Kai; Safarian, Jafar (Journal article; Peer reviewed, 2019)
      This research is devoted to study phosphorus removal from Si-Al alloys by vacuum refining of the ternary system of dilute solutions of P in Si-20 wt%Al. The experiments were carried out in an induction furnace and after ...
    • Kinetics Analysis of Steam Reforming of Methane on Sponge Iron 

      Ramos Ribeiro, Tiago; Ferreira Neto, João Batista; Rocha Poço, João Guilherme; Takano, Cyro; Kolbeinsen, Leiv; Ringdalen, Eli (Peer reviewed; Journal article, 2022)
      The kinetics of steam reforming of methane catalyzed by sponge iron was studied at temperatures between 875°C and 1050°C. Results shows that sponge iron acts as a catalyst and methane conversion is increased in higher ...
    • L-DOPA-Coated Manganese Oxide Nanoparticles as Dual MRI Contrast Agents and Drug-Delivery Vehicles 

      McDonagh, Birgitte Hjelmeland; Singh, Gurvinder; Hak, Sjoerd; Bandyopadhyay, Sulalit; Augestad, Ingrid Lovise; Peddis, Davide; Sandvig, Ioanna; Sandvig, Axel; Glomm, Wilhelm (Peer reviewed; Journal article, 2016)
      Manganese oxide nanoparticles (MONPs) are capable of time‐dependent magnetic resonance imaging contrast switching as well as releasing a surface‐bound drug. MONPs give T2/T2* contrast, but dissolve and release T1‐active ...
    • Lab Scale Experiments on Alumina Raft Formation 

      Gylver, Sindre Engzelius; Solheim, Asbjørn; Gudbrandsen, Henrik; Follo, Åste Hegglid; Einarsrud, Kristian Etienne (The Minerals, Metals & Materials Series;2367-1181, Chapter; Peer reviewed, 2020)
      During feeding of alumina into a Hall-Héroult cell, rafts floating on the bath surface may be formed. In this study, rafts were created in a laboratory furnace by adding 4 g secondary alumina in industrial bath. Samples ...
    • Laboratory scale study of reverse priming in aluminium filtration 

      Bao, Sarina; Syvertsen, Martin; Syvertsen, Freddy; Gihleengen, Britt Elin; Tundal, Ulf; Pettersen, Tanja (The Minerals, Metals & Materials Series;2367-1181, Peer reviewed; Journal article, 2019)
      Inclusions are one of the most serious problems encountered in aluminium production and melt treatment. Even small inclusions, not larger than a few tens of micrometres, can potentially have considerable consequences for ...
    • Large bandgap insulating superior clay nanosheets 

      Pacáková, Barbara; Vullum, Per Erik; Kirch, Alexsandro; Breu, Josef; Miranda, Caetano Rodrigues; Fossum, Jon Otto (Peer reviewed; Journal article, 2022)
      One can find conductive, semiconducting, and insulating single nanosheets with unique electronic properties that are tied to their two-dimensional (2D) structure. Here, we report on wide-bandgap 2D insulator nanosheets ...
    • Large scale experiments on high-rate three-phase low liquid loading flows 

      Kjølaas, Jørn; Unander, Tor Erling; Schümann, Heiner; Wolden, Marita; Holm, Henning (International Conference on Multiphase Technology;2019, Chapter; Peer reviewed, 2019)
      A comprehensive three-phase flow campaign, funded by Equinor as part of the Tanzania gas field development project [1] [2] [3], was carried out in the SINTEF Large Scale Loop at Tiller in 2017-2018. The experiments were ...
    • Large time step HLL and HLLC schemes 

      Prebeg, Marin; Flåtten, Tore Halsne; Müller, Bernhard (Journal article; Peer reviewed, 2018)
      We present Large Time Step (LTS) extensions of the Harten-Lax-van Leer (HLL) and Harten-Lax-van Leer-Contact (HLLC) schemes. Herein, LTS denotes a class of explicit methods stable for Courant numbers greater than one. The ...
    • Large Time Step Roe scheme for a common 1D two-fluid model 

      Prebeg, Marin; Flåtten, Tore; Müller, Bernhard (Peer reviewed; Journal article, 2017)
      We present the Large Time Step (LTS) extension of the Roe scheme and apply it to a standard two-fluid model. Herein, LTS denotes a class of explicit methods that are not limited by the CFL (Courant–Friedrichs–Lewy) condition, ...
    • Laser Beam and Laser-Arc Hybrid Welding of Aluminium Alloys 

      Bunaziv, Ivan; Akselsen, Odd Magne; Ren, Xiaobo; Nyhus, Bård; Eriksson, Magnus Carl Fredrik (Peer reviewed; Journal article, 2021)
      Aluminium alloys are widely used in many industries due to their high strength-to-weight ratios and resistance to corrosion. Due to their specific thermophysical properties and intricate physical metallurgy, these alloys ...
    • Laser welding of niobium to AISI 304 steel using a copper interlayer 

      Zhao, Jian; Shi, Mingxiao; Li, Yanjun; Ma, Xiang; Fang, Zhenxing; Yan, Hua (Peer reviewed; Journal article, 2020)
      Cu interlayers with thicknesses of 1, 1.5, and 2 mm were used to join niobium and AISI 304 steel. Fractures occurred in the weld, the Nb base metal, and the unmelted Cu interlayer when the Cu interlayer thickness was 1, ...
    • Laser-arc hybrid welding of 12- and 15-mm thick structural steel 

      Bunaziv, Ivan; Dørum, Cato; Nielsen, Steen Erik; Suikkanen, Pasi; Ren, Xiaobo; Nyhus, Bård; Eriksson, Magnus Carl Fredrik; Akselsen, Odd Magne (Peer reviewed; Journal article, 2020)
      High-power lasers are very effective in welding of plates thicker than 10 mm due to the keyhole mode. High-power intensity generates a vapor-filled cavity which provides substantial penetration depth. Due to the narrow and ...
    • Latent hardening and plastic anisotropy evolution in AA6060 aluminium alloy 

      Khadyko, Mikhail; Dumoulin, Stephane; Cailletaud, Georges; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2016)
      The crystal plasticity theory predicts that hardening on a particular slip system and its corresponding work-hardening rate will depend on the slip activity on both this slip system and all others. The exact form of this ...
    • Lattice rotations in precipitate free zones in an Al-Mg-Si alloy 

      Christiansen, Emil; Marioara, Calin Daniel; Marthinsen, Knut; Hopperstad, Odd Sture; Holmestad, Randi (Peer reviewed; Journal article, 2018)
      Scanning precession electron diffraction and automated crystal orientation mapping in a transmission electron microscope (TEM) have been applied to quantitatively study the crystal orientation of precipitate free zones ...