Browsing Kjemisk institutt by Author "Olsbye, Unni"

Now showing items 41-49 of 49

  • SYNTHESIS OF HIGH SILICA CHA ZEOLITES WITH CONTROLLED Si/Al RATIO 
    Eilertsen, Einar Andre; Nilsen, Merete Hellner; Wendelbo, Rune; Olsbye, Unni; Lillerud, Karl Petter (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2008)
    Zeolites with the CHA topology have been synthesized with Si/Al ratios ranging from 15 to 133. ICP-AES analysis shows that the Si/Al ratio in the material is close to linearly related to the Si/Al ratio in the reaction ...
  • Synthesis of mesoporous ZSM-5 zeolite encapsulated in an ultrathin protective shell of silicalite-1 for MTH conversion 
    Goodarzi, Farnoosh; Pinilla Herrero, Irene; Kalantzopoulos, Georgios N.; Svelle, Stian; Lazzarini, Andrea; Beato, Pablo; Olsbye, Unni; Kegnæs, Søren (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Coke formation is a major reason in deactivation of acidic zeolite catalysts in industrial processes such as methanol to hydrocarbons conversion. Protecting the surface of acidic zeolite with an inert porous shell can ...
  • Tailoring Cu nanoparticle catalyst for methanol synthesis using the spinning disk reactor 
    Ahoba-Sam, Christian; Boodhoo, Kamelia V.K.; Olsbye, Unni; Jens, Klaus-Joachim (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Cu nanoparticles are known to be very active for methanol (MeOH) synthesis at relatively low temperatures, such that smaller particle sizes yield better MeOH productivity. We aimed to control Cu nanoparticle (NP) size and ...
  • The Role of Solvent Polarity on Low-Temperature Methanol Synthesis Catalyzed by Cu Nanoparticles 
    Ahoba-Sam, Christian; Olsbye, Unni; Jens, Klaus-Joachim (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Methanol syntheses at low temperature in a liquid medium present an opportunity for full syngas conversion per pass. The aim of this work was to study the role of solvents polarity on low-temperature methanol synthesis ...
  • Two-Step Dry Gel Method Produces MgAPO-11 with Low Aspect Ratio and Improved Catalytic Performance in the Conversion of Methanol to Hydrocarbons 
    Zhang, Lina; Firth, Daniel Sean; Olsbye, Unni; Bao, Xiaojun (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    In this article, the synthesis, characterization and catalytic performance of three MgAPO-11 catalysts with distinct crystal morphologies (sunflower, ball and candy) are presented. Among the three samples, the candy-like ...
  • Understanding C-H activation in light alkanes over Cu-MOR zeolites by coupling advanced spectroscopy and temperature-programmed reduction experiments 
    Kvande, Karoline; Garetto, Beatrice; Deplano, Gabriele; Signorile, Matteo; Solemsli, Bjørn Gading; Prodinger, Sebastian; Olsbye, Unni; Beato, Pablo; Bordiga, Silvia; Svelle, Stian; Borfecchia, Elisa (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The direct activation of methane to methanol (MTM) proceeds through a chemical-looping process over Cu-oxo sites in zeolites. Herein, we extend the overall understanding of oxidation reactions over metal-oxo sites and C–H ...
  • Zeolite morphology and catalyst performance: Conversion of methanol to hydrocarbons over offretite 
    Lukaszuk, Katarzyna Anna; Rojo-Gama, Daniel; Øien-Ødegaard, Sigurd; Lazzarini, Andrea; Berlier, Gloria; Bordiga, Silvia; Lillerud, Karl Petter; Olsbye, Unni; Beato, Pablo; Lundegaard, Lars Fahl; Svelle, Stian (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    The synthesis, characterization and catalytic performance of offretite with four distinct crystal morphologies (oval, hexagonal, broccoli-like, and spherical) are presented. As a member of the ABC-6 family of zeolite ...
  • Zeolite surface methoxy groups as key intermediates in the stepwise conversion of methane to methanol 
    Dyballa, Michael Martin; Thorshaug, Knut; Pappas, Dimitrios; Borfecchia, Elisa; Kvande, Karoline; Bordiga, Silvia; Berlier, Gloria; Lazzarini, Andrea; Olsbye, Unni; Beato, Pablo; Svelle, Stian; Arstad, Bjørnar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    This contribution clarifies the overoxidation-preventing key step in the methane-to-methanol (MTM) conversion over copper mordenite zeolites. We followed the methane-to-methanol conversion over copper mordenite zeolites ...
  • Zn Redistribution and Volatility in ZnZrOx Catalysts for CO2 Hydrogenation 
    Redekop, Evgeniy; Cordero-Lanzac, Tomás; Salusso, Davide; Pokle, Anuj; Øien-Ødegaard, Sigurd; Sunding, Martin Fleissner; Diplas, Spyridon; Negri, Chiara; Borfecchia, Elisa; Bordiga, Silvia; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    ZnO–ZrO2 mixed oxide (ZnZrOx) catalysts are widely studied as selective catalysts for CO2 hydrogenation into methanol at high-temperature conditions (300–350 °C) that are preferred for the subsequent in situ zeolite-catalyzed ...