Browsing Kjemisk institutt by Author "Svelle, Stian"

Now showing items 1-20 of 32

  • 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 ...
  • 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 ...
  • Collective action of water molecules in zeolite dealumination 
    Nielsen, Malte; Hafreager, Anders; Brogaard, Rasmus Yding; De Wispelaere, Kristof; Falsig, Hanne; Beato, Pablo; Van Speybroeck, Veronique; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    When exposed to steam, zeolite catalysts are irreversibly deactivated by loss of acidity and framework degradation caused by dealumination. Steaming typically occurs at elevated temperatures, making it challenging to ...
  • 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 ...
  • 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 ...
  • Copper Pairing in the Mordenite Framework as a Function of the CuI/CuII Speciation 
    Deplano, Gabriele; Martini, Andrea; Signorile, Matteo; Borfecchia, Elisa; Crocellà, Valentina; Svelle, Stian; Bordiga, Silvia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    A series of gas-phase reactants is used to treat a Cu-exchanged mordenite zeolite with the aim of studying the influence of the reaction environment on the formation of Cu pairs. The rearrangement of Cu ions to form ...
  • Copper-zeolites Prepared by Solid-state Ion Exchange - Characterization and Evaluation for the Direct Conversion of Methane to Methanol 
    Kvande, Karoline; Prodinger, Sebastian; Schlimpen, Fabian; Beato, Pablo; Pale, Patrick; Chassaing, Stefan; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Direct conversion of methane to methanol (MTM) over Cu-zeolites is a so-called “dream reaction” for the chemical industry. There is still a lot that can be done in order to optimize the reaction by e.g. achieving ...
  • 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 ...
  • Effect of Benzoic Acid as a Modulator in the Structure of UiO-66: An Experimental and Computational Study 
    Atzori, Cesare; Shearer, Greig Charles; Maschio, Lorenzo; Civalleri, Bartolomeo; Bonino, Francesca; Lamberti, Carlo; Svelle, Stian; Lillerud, Karl Petter; Bordiga, Silvia (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    The identification and quantification of defects are undoubtedly thorough challenges in the characterization of “defect-engineered” metal–organic frameworks (MOFs). UiO-66, known for its exceptional stability and defect ...
  • From Catalytic Test Reaction to Modern Chemical Descriptors in Zeolite Catalysis Research  
    Prodinger, Sebastian; Beato, Pablo; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    For the successful implementation of catalysts in industrial processes, three overall goals are optimized: activity, selectivity, and stability. This review will address the role of chemical descriptors in aiding and guiding ...
  • 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 ...
  • Hydrogenation of CO2 to Methanol by Pt Nanoparticles Encapsulated in UiO-67: Deciphering the Role of the Metal–Organic Framework 
    Gutterød, Emil Sebastian; Lazzarini, Andrea; Fjermestad, Torstein; Kaur, Gurpreet; Manzoli, Maela; Bordiga, Silvia; Svelle, Stian; Lillerud, Karl Petter; Skúlason, Egill; Øien-Ødegaard, Sigurd; Nova, Ainara; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Metal–organic frameworks (MOFs) show great prospect as catalysts and catalyst support materials. Yet, studies that address their dynamic, kinetic, and mechanistic role in target reactions are scarce. In this study, an ...
  • Impact of post-synthetic treatments on unidirectional H-ZSM-22 zeolite catalyst: Towards improved clean MTG catalytic process 
    Del Campo, Pablo; Olsbye, Unni; Lillerud, Karl Petter; Svelle, Stian; Beato, Pablo (Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
    In the present study, a series of H-ZSM-22 mesoporous catalysts resulting from three different desilication treatments (NaOH treatment, treatment using mixtures of NaOH/CTAB and using mixtures of NaOH/TBAOH) and sequential ...
  • Influence of Cu-speciation in mordenite on direct methane to methanol conversion: Multi-Technique characterization and comparison with NH3 selective catalytic reduction of NOx 
    Pappas, Dimitrios; Kvande, Karoline; Kalyva, Maria Evangelou; Dyballa, Michael Martin; Lomachenko, Kirill A.; Arstad, Bjørnar; Borfecchia, Elisa; Bordiga, Silvia; Olsbye, Unni; Beato, Pablo; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The direct conversion of methane to methanol has the potential of substantially reducing methane emissions and flaring, as such a process might provide an alternative for remote natural gas locations. In this report, we ...
  • Influence of Defects and H2O on the Hydrogenation of CO2 to Methanol over Pt Nanoparticles in UiO-67 Metal-Organic Framework 
    Gutterød, Emil Sebastian; Pulumati, S.H.; Kaur, Gurpreet; Lazzarini, Andrea; Solemsli, B. G.; Gunnæs, Anette Eleonora; Ahoba-Sam, Christian; Kalyva, Maria Evangelou; Sannes, Johnny Andreas; Svelle, Stian; Skúlason, Egill; Nova, Ainara; Olsbye, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    In catalysts for CO2 hydrogenation, the interface between metal nanoparticles (NPs) and the support material is of high importance for the activity and reaction selectivity. In Pt NP-containing UiO Zr-metal–organic frameworks ...
  • Mapping the coke formation within a zeolite catalyst extrudate in space and time by operando computed X-ray diffraction tomography 
    Wragg, David Stephen; Kalantzopoulos, Georgios; Pappas, Dimitrios; Pinilla-Herrero, Irene; Rojo-Gama, Daniel; Redekop, Evgeniy; Di Michiel, Marco; Beato, Pablo; Lundegaard, Lars Fahl; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    We have used operando X-ray diffraction computed tomography (XRD-CT) analysed by rigorous crystallographic methods to reveal the behaviour of a zeolite/alumina based catalyst extrudate in the methanol-to-hydrocarbon reaction ...
  • Methane to methanol: structure-activity relationships for Cu-CHA 
    Pappas, Dimitrios; Borfecchia, Elisa; Dyballa, Michael Martin; Pankin, Ilia A.; Lomachenko, Kirill A.; Martini, Andrea; Signorile, Matteo; Teketel, Shewangizaw; Arstad, Bjørnar; Berlier, Gloria; Lamberti, Carlo; Bordiga, Silvia; Olsbye, Unni; Lillerud, Karl Petter; Svelle, Stian; Beato, Pablo (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    Cu-exchanged zeolites possess active sites that are able to cleave the C–H bond of methane at temperatures ≤200 °C, enabling its selective partial oxidation to methanol. Herein we explore this process over Cu-SSZ-13 ...