Browsing Kjemisk institutt by Author "Olsbye, Unni"

Now showing items 1-20 of 48

  • A CO2 valorization plant to produce light hydrocarbons: Kinetic model, process design and life cycle assessment 
    Cordero-Lanzac, Tomas; Ramirez, Adrian; Cruz-Fernandez, Marta; Zander, Hans-Jörg; Joensen, Finn; Woolas, Steven; Meiswinkel, Andreas; Styring, Peter; Gascon, Jorge; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Reliable Life Cycle Assessment (LCA) of processes for valorization of CO2-rich off-gas streams requires multidisciplinary contributions that span the development of active and selective catalysts, reactor design, plant ...
  • A temporal analysis of products (TAP) study of C2-C4 alkene reactions with a well-defined pool of methylating species on ZSM-22 zeolite 
    Redekop, Evgeniy; Lazzarini, Andrea; Bordiga, Silvia; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Reactions between alkenes and methanol or dimethyl ether (DME) on zeolite catalysts are involved in industrial processes that are highly relevant for the transition to renewable carbon sources, such as the Methanol-To-Hydrocarbons ...
  • A toroidal Zr70 oxysulfate cluster and its diverse packing structures 
    Øien-Ødegaard, Sigurd; Bazioti, Kalliopi; Redekop, Evgeniy; Prytz, Øystein; Lillerud, Karl Petter; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Herein, we report the discovery of a toroidal inorganic cluster of zirconium(IV) oxysulfate of unprecedented size with the formula Zr70(SO4)58(O/OH)146⋅x(H2O) (Zr70), which displays different packing of ring units and thus ...
  • Acidity effect on benzene methylation kinetics over substituted H-MeAlPO-5 catalysts 
    Mortén, Magnus; Cordero Lanzac, Tomas; Cnudde, Pieter; Redekop, Evgeniy; Svelle, Stian; Van Speybroeck, Veronique; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Methylation of aromatic compounds is a key reaction step in various industrial processes such as the aromatic cycle of methanol-to-hydrocarbons chemistry. The study of isolated methylation reactions and of the influence ...
  • Catalyst sites and active species in the early stages of MTO conversion over cobalt AlPO-18 followed by IR spectroscopy 
    Airi, Alessia; Damin, Alessandro; Xie, Jingxiu; Olsbye, Unni; Bordiga, Silvia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The isomorphic insertion of cobalt(II) confers strong acidity to the AlPO-18 zeotype. This makes it a suitable catalyst for the acid catalysed conversion of methanol to olefins (MTO). However, due to the tendency of Co(II) ...
  • Cation-induced speciation of port-size during mordenite zeolite synthesis 
    Prodinger, Sebastian; Capel Berdiell, Izar; Cordero-Lanzac, Tomas; Bygdnes, Odd Reidar; Solemsli, Bjørn Gading; Kvande, Karoline; Arstad, Bjørnar; Beato, Pablo; Olsbye, Unni; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Mordenite (MOR) zeolite, an important industrial catalyst exists in two, isostructural variants defined by their port-size, small and large-port. Here we show for the first time how a systematic, single-parameter variation ...
  • Co-catalyst free ethene dimerization over Zr-based metal-organic framework (UiO-67) functionalized with Ni and bipyridine 
    Kømurcu, Mustafa; Lazzarini, Andrea; Kaur, Gurpreet; Borfecchia, Elisa; Øien-Ødegaard, Sigurd; Gianolio, Diego; Bordiga, Silvia; Lillerud, Karl Petter; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Ni functionalized metal organic frameworks (MOF) are promising heterogeneous ethene dimerization catalysts. Activities comparable to or higher than Ni-aluminosilicates have been reported in literature. However, unlike the ...
  • Comparing the Nature of Active Sites in Cu-loaded SAPO-34 and SSZ-13 for the Direct Conversion of Methane to Methanol 
    Kvande, Karoline; Pappas, Dimitrios; Dyballa, Michael Martin; Buono, Carlo; Signorile, Matteo; Borfecchia, Elisa; Lomachenko, Kirill A.; Arstad, Bjørnar; Bordiga, Silvia; Berlier, Gloria; Olsbye, Unni; Beato, Pablo; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    On our route towards a more sustainable future, the use of stranded and underutilized natural gas to produce chemicals would be a great aid in mitigating climate change, due to the reduced CO2 emissions in comparison to ...
  • Controlling the Synthesis of Metal−Organic Framework UiO-67 by Tuning Its Kinetic Driving Force 
    Kaur, Gurpreet; Øien-Ødegaard, Sigurd; Lazzarini, Andrea; Chavan, Sachin Maruti; Bordiga, Silvia; Lillerud, Karl Petter; Olsbye, Unni (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    The successful synthesis of metal−organic framework (MOF) compounds relies on an intricate interplay between the components of the synthesis liquor at the given synthesis conditions. Herein, we explore the interdependence ...
  • Conversion of methanol to hydrocarbons over zeolite ZSM-23 (MTT): Exceptional effects of particle size on catalyst lifetime. 
    Molino, Andrea; Lukaszuk, Katarzyna Anna; Rojo-Gama, Daniel; Lillerud, Karl Petter; Olsbye, Unni; Bordiga, Silvia; Svelle, Stian; Beato, Pablo (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    A variety of synthetic procedures have been used to obtain zeolite ZSM-23 (MTT) catalysts with crystallite sizes ranging from the micrometer to nanometer scale. When the acidic zeolite is used as catalyst for the Methanol ...
  • Cu-CHA – a model system for applied selective redox catalysis 
    Borfecchia, Elisa; Beato, Pablo; Svelle, Stian; Olsbye, Unni; Lamberti, Carlo; Bordiga, Silvia (Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
    We review the structural chemistry and reactivity of copper-exchanged molecular sieves with chabazite (CHA) topology, as an industrially applied catalyst in ammonia mediated reduction of harmful nitrogen oxides (NH3-SCR) ...
  • Cu-loaded zeolites enable the selective activation of ethane to ethylene at low temperatures and pressure 
    Kvande, Karoline; Prodinger, Sebastian; Solemsli, Bjørn Gading; Bordiga, Silvia; Borfecchia, Elisa; Olsbye, Unni; Beato, Pablo; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Sending ethane over Cu-oxo sites in zeolites allows for the selective formation of ethylene in a stepwise reaction at mild conditions. Experimental results indicate that the reaction proceeds via the formation of ethanol ...
  • Deactivation of Zeolite Catalyst H-ZSM-5 during Conversion of Methanol to Gasoline: Operando Time- and Space-Resolved X-ray Diffraction 
    Rojo-Gama, Daniel; Mentel, Lukasz; Kalantzopoulos, Georgios N.; Pappas, Dimitrios; Dovgaliuk, Iurii; Olsbye, Unni; Lillerud, Karl Petter; Beato, Pablo; Lundegaard, Lars Fahl; Wragg, David; Svelle, Stian (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    The deactivation of zeolite catalyst H-ZSM-5 by coking during the conversion of methanol to hydrocarbons was monitored by high-energy space- and time-resolved operando X-ray diffraction (XRD) . Space resolution was achieved ...
  • Direct CO2 to methanol reduction on Zr6-MOF based composite catalysts: a critical review 
    Tezel, Elif; Sannes, Dag Kristian; Svelle, Stian; Szilagyi, Petra Agota; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The pressing problem of climate change on account of anthropogenic greenhouse-gas emissions underlines the necessity for carbon capture and utilisation technologies. Several heterogeneous catalyst systems allowing the ...
  • Evolution of Pt and Pd species in functionalized UiO-67 metal-organic frameworks 
    Bugaev, Aram L.; Skorynina, Alina A.; Braglia, Luca; Lomachenko, Kirill A.; Guda, Alexander; Lazzarini, Andrea; Bordiga, Silvia; Olsbye, Unni; Lillerud, Karl Petter; Soldatov, Alexander V.; Lamberti, Carlo (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Functionalization of metal-organic frameworks (MOFs) with noble metals is a promising way for producing new versatile catalysts that will combine the outstanding porosity and specific surface area of MOFs with high catalytic ...
  • Experimental and theoretical evidence for promotional effect of acid sites on the diffusion of alkenes through small-pore zeolites 
    Cnudde, Pieter; Redekop, Evgeniy; Dai, Weili; Porcaro, Natale G.; Waroquier, Michel; Bordiga, Silvia; Hunger, Michael; Li, Landong; Olsbye, Unni; Van Speybroeck, Veronique (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The diffusion of saturated and unsaturated hydrocarbons is of fundamental importance for many zeolite-catalyzed processes. Transport of small alkenes in the confined zeolite pores can become hindered, resulting in a ...
  • Formation and functioning of bimetallic nanocatalysts: The power of X-ray probes 
    Filez, Matthias; Redekop, Evgeniy; Dendooven, Jolien; Ramachandran, Ranjith K.; Solano, Eduardo; Olsbye, Unni; Weckhuysen, Bert M.; Galvita, Vladimir V.; Poelman, Hilde; Detavernier, Christophe; Marin, Guy B. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Bimetallic nanocatalysts are key enablers of current chemical technologies, including car exhaust converters and fuel cells, and play a crucial role in industry to promote a wide range of chemical reactions. However, owing ...
  • From Lab to Technical CO2 Hydrogenation Catalysts: Understanding PdZn Decomposition 
    Ticali, Pierfrancesco; Salusso, Davide; Airi, Alessia; Morandi, Sara; Borfecchia, Elisa; Ramirez, Adrian; Cordero-Lanzac, Tomas; Gascon, Jorge; Olsbye, Unni; Joensen, Finn; Bordiga, Silvia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The valorization of CO2 to produce high-value chemicals, such as methanol and hydrocarbons, represents key technology in the future net-zero society. Herein, we report further investigation of a PdZn/ZrO2 + SAPO-34 catalyst ...
  • High Zn/Al ratios enhance dehydrogenation vs hydrogen transfer reactions of Zn-ZSM-5 catalytic systems in methanol conversion to aromatics 
    Pinilla-Herrero, Irene; Borfecchia, Elisa; Holzinger, Julian; Mentzel, Uffe V.; Joensen, Finn; Lomachenko, Kirill A.; Bordiga, Silvia; Lamberti, Carlo; Berlier, Gloria; Olsbye, Unni; Svelle, Stian; Skibsted, Jørgen; Beato, Pablo (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Two series of Zn-ZSM-5 catalysts were prepared by ion exchanging two commercial zeolites with different Si/Al ratios (40 and 15) with increasing Zn loadings. The nature of the Zn sites in the zeolite was studied by ...
  • Highly effective conversion of CO2 into light olefins abundant in ethene 
    Wang, Sen; Zhang, Li; Wang, Pengfei; Liu, Xingchen; Chen, Yanyan; Qin, Zhangfeng; Dong, Mei; Wang, Jianguo; He, Lin; Olsbye, Unni; Fan, Weibin (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    Conversion of CO2 into light olefins is an effective strategy for sustainable utilization of fossil energy and biomass. However, highly selective production of specific olefin, such as ethene, from CO2 hydrogenation is a ...