Browsing Kjemisk institutt by Author "Svelle, Stian"

Now showing items 21-32 of 32

  • Morphology-induced shape selectivity in zeolite catalysis 
    Teketel, Shewangizaw; Lundegaard, Lars Fahl; Skistad, Wegard; Chavan, Sachin Maruti; Olsbye, Unni; Lillerud, Karl Petter; Beato, Pablo; Svelle, Stian (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2015)
    Zeolites are crystalline aluminosilicates that are widely used as shape-selective catalysts in the refinery and petrochemical industries. By synthesizing a series of structurally related zeolite catalyst and applying them ...
  • Real-time regeneration of a working zeolite monitored via operando X-ray diffraction and crystallographic imaging: how coke flees the MFI framework 
    Kalantzopoulos, Georgios; Rojo Gama, Daniel; Pappas, Dimitrios; Dovgaliuk, Iurii; Olsbye, Unni; Beato, Pablo; Lundegaard, Lars F.; Wragg, David Stephen; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We have monitored the regeneration of H-ZSM-5 via operando time-resolved powder X-Ray diffraction (PXRD) coupled with mass spectroscopy (MS). Parametric Rietveld refinements and calculation of the extra-framework electronic ...
  • A Straightforward Descriptor for the Deactivation of Zeolite Catalyst H-ZSM-5 
    Rojo-Gama, Daniel; Nielsen, Malte; Wragg, David; Dyballa, Michael Martin; Holzinger, Julian; Falsig, Hanne; Lundegaard, Lars Fahl; Beato, Pablo; Brogaard, Rasmus Yding; Lillerud, Karl Petter; Olsbye, Unni; Svelle, Stian (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    ZSM-5 is a widely used zeolite catalyst and is employed industrially for the methanol to gasoline (MTG) process. Even so, deactivation of ZSM-5 by coke formation constitutes a major technical and also fundamental challenge. ...
  • Structure-deactivation relationships in zeolites during the methanol–to-hydrocarbons reaction: Complementary assessments of the coke content 
    Rojo-Gama, Daniel; Signorile, Matteo; Bonino, Francesca; Bordiga, Silvia; Olsbye, Unni; Lillerud, Karl Petter; Beato, Pablo; Svelle, Stian (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    Catalyst deactivation during the methanol-to-hydrocarbons (MTH) reaction was investigated using five different commercially prepared microporous catalysts, including Mordenite, ZSM-22, ZSM-5, zeolite Beta and SAPO-34. The ...
  • 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 ...
  • Synthesis of ZSM-23 (MTT) zeolites with differentcrystal morphology and intergrowths: effects onthe catalytic performance in the conversion ofmethanol to hydrocarbons 
    Molino, Andrea; Holzinger, J.; Lukaszuk, Katarzyna Anna; Rojo-Gama, Daniel; Gunnæs, Anette Eleonora; Skibsted, J.; Lundegaard, Lars Fahl; Svelle, Stian; Beato, Pablo; Bordiga, Silvia; Lillerud, Karl Petter (Journal article / Tidsskriftartikkel / SubmittedVersion, 2019)
    A series of zeolite ZSM-23 samples prepared with different organic structure-directing agents, gave rise to crystalline phases, which show a large variety of particle dimensions. A detailed analysis of the structure of ...
  • Titration of Cu(I) Sites in Cu-ZSM-5 by Volumetric CO Adsorption 
    Deplano, Gabriele; Signorile, Matteo; Crocellà, Valentina; Porcaro, Natale Gabriele; Atzori, Cesare; Solemsli, Bjørn Gading; Svelle, Stian; Bordiga, Silvia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Cu-exchanged zeolites are widely studied materials because of their importance in industrial energetic and environmental processes. Cu redox speciation lies at the center of many of these processes but is experimentally ...
  • Topology-dependent hydrocarbon transformations in the methanol to hydrocarbons reaction studied by operando UV-Raman spectroscopy 
    Signorile, Matteo; Rojo-Gama, Daniel; Bonino, Francesca; Beato, Pablo; Svelle, Stian; Bordiga, Silvia (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    The methanol-to-hydrocarbons (MTH) reaction represents a versatile, industrially viable alternative to crude-oil based processes for the production of chemicals and fuels. In the MTH reaction, the shape selectivity of ...
  • Tracking Structural Deactivation of H-Ferrierite Zeolite Catalyst During MTH with XRD 
    Berdiell, Izar Capel; Braghin, Giorgio Bruno; Cordero-Lanzac, Tomas; Beato, Pablo; Lundegaard, Lars F.; Wragg, David Stephen; Bordiga, Silvia; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract We used the methanol-to-hydrocarbon (MTH) reaction as a shape-selective model reaction to investigate coke formation in zeolite H-Ferrierite. Despite being a 2D topology in terms of channel propagation, the FER ...
  • 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 ...