Browsing Kjemisk institutt by Author "Beato, Pablo"

Now showing items 1-20 of 26

  • 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-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 ...
  • 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 ...
  • From Colloidal Monodisperse Nickel Nanoparticles to Well-Defined Ni/Al2O3 Model Catalysts 
    Zacharaki, Eirini; Beato, Pablo; Tiruvalam, Ramchandra R; Andersson, Klas J.; Fjellvåg, Helmer; Sjåstad, Anja Olafsen (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    In the past few decades, advances in colloidal nanoparticle synthesis have created new possibilities for the preparation of supported model catalysts. However, effective removal of surfactants is a prerequisite to evaluate ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...