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Blar i NTNU Open på forfatter "Mathisen, Karina"

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Viser treff 1-20 av 35

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    • An In Situ XAS Study of the Cobalt Rhenium Catalyst for Ammonia Synthesis 

      Mathisen, Karina; Kirste, Karsten Granlund; Hargreaves, Justin S. J. (Journal article; Peer reviewed, 2018)
      A cobalt rhenium catalyst active for ammonia synthesis at 400 °C and ambient pressure was studied using in situ XAS to elucidate the reducibility and local environment of the two metals during reaction conditions. The ...
    • An In-situ FTIR Study of the Methanol to Hydrocarbons Reaction Over Zeolite Catalysts 

      Forselv, Stian (Master thesis, 2011)
      This thesis investigates several different types of zeolites during the conversion of methanol to hydrocarbons, and examines the effects of the differences between them. All samples were characterized by SEM, XRD, ICP-MS ...
    • Characterization of Gold and Copper Species in Nanoporous Materials 

      Opsahl, Anette (Master thesis, 2012)
      Global warming and energy production from other sources than fossil fuels have the last years attracted more and more attention. Catalysis plays an important role in controlling the emission of greenhouse gases and other ...
    • COx-free hydrogen production from ammonia – mimicking the activity of Ru catalysts with unsupported Co-Re alloys 

      Kirste, Karsten Granlund; McAulay, Kate; E. Bell, Tamsin; Stoian, Dragos; Laassiri, Said; Hargreaves, Justin S. J.; Mathisen, Karina; Torrente-Murciano, Laura (Peer reviewed; Journal article, 2020)
      On-demand production of hydrogen from ammonia is a challenge limiting the implementation of ammonia as a long term hydrogen vector to overcome the difficulties associated with hydrogen storage. Herein, we present the ...
    • Developing synthesis route for CuSAPO-18 

      Botten, Sigurd Norum (Master thesis, 2019)
      I dette arbeidet ble synthese av SAPO-18 med kobber isomorfisk substituert forsøkt via en hydrotermisk metode. Metoder basert på di-isopropyletylamin (DIPEA) ble funnet til å redusere deler av eller alt kobberet til ...
    • The Effect of mechanical mixing and Porosity on the Activity of Ag and Cu Ion exchanged Zeotypes in the HC-SCR of NOx with Propene 

      Botne, Georg (Master thesis, 2017)
      Abstract The effect of mechanical mixing and porosity of Ag and Cu ion exchanged zeotypes in the hydrocarbon selective catalytic reduction (HC-SCR) of NOx with propene has been investigated. To this effect, mordenite, ...
    • Effect of Porosity and Copper Content on Copper Containing SAPO-34 for Removal of NOx 

      Hutcheson, Anders (Master thesis, 2018)
      In this thesis, hierarchical SAPO-34 with copper isomorphously substituted(H/CuSAPO-34) was attempted synthesised, by a hydrothermal method. As a step in the process, hierarchical SAPO-34 without copper(H/SAPO-34) was ...
    • Effect of Porosity on the Hydrothermal Stability of CuSAPO-34 for the deNOx Process 

      Sørli, Guro (Master thesis, 2016)
      Hierarchical SAPO-34 with incorporated copper was tried synthesised both through a dry gel conversion and a hydrothermal method. Crystalline copper incorporated hierarchical SAPO-34 was not obtained through these directions. ...
    • Evaluation of surfactant templates for one-pot hydrothermal synthesis of hierarchical SAPO-5 

      Ali, Daniel; Zeiger, Caren; Azim, Muhammad Mohsin; Lein, Hilde Lea; Mathisen, Karina (Peer reviewed; Journal article, 2020)
      Hierarchical SAPO-5 molecular sieves were synthesized with three different mesopore structure-directing agents (meso-SDAs) (cetyltrimethylammonium bromide (CTAB), myristyltrimethylammonium bromide (MTMAB) and [3-(trime ...
    • Fe-ZSM-5 og Fe-SAPO-34 Katalysatorer for Lavtemperatur Selektiv Katalytisk Reduksjon av NOx med NH3 

      Landfald, Lisa Leganger (Master thesis, 2019)
      Jernbaserte katalysatorer med zeolitten ZSM-5 og zeotypene konvensjonell SAPO-34 og hierarkisk SAPO-34 som bærere ble laget for å undersøke katalytiske opptredenen for selektiv katalytisk reduksjon av NOX med NH3 ved lavere ...
    • Functionalization of Silica Aerogels and AlPO-5 with Molybdenum, Rhenium - A Study on Metal Introduction Methods 

      Liu, Tengzhi (Master thesis, 2018)
      In the present work possible routes for the introduction of Mo and Re into silica aerogels and aluminophosphate AlPO-5 have been investigated. Parameter studies on the influence of synthesis conditions including metal ...
    • Hydrothermal synthesis of materials for intermediate band solar cells 

      Mikalsen, Ragni Fjellgaard (Master thesis, 2013)
      Solar energy is an abundant energy source that may provide an environmentallyfriendly alternative to fossil fuels. The utilization of the solar energy have so farbeen limited by various energy losses in the photovoltaic ...
    • Incorporation of Iron(III) in Silica Aerogels 

      Kristoffersen, Simeon (Master thesis, 2016)
      Silica aerogels containing both single site Fe3+ as well as small FexOy nanoparticles of oxide/hydroxide species were synthesized from a waterglass precursor using co-precursor and ambient pressure drying techniques. Fe3+ ...
    • Incorporation of Rhenium in ITQ-33 

      Knapperholen, Øyvind (Master thesis, 2016)
      ITQ-33 was synthesized by the fluorine route, and the last of three batches was considered phase pure. The as-synthesized samples were then treated with different alkaline and acidic solutions (degermanation), to determine ...
    • Introduction of Cobalt Into Silica Aerogels, Metal Speciation and Reducibility 

      Håbrekke, Sondre (Master thesis, 2017)
      Hydrophobic and amorphous silica aerogels with incorporated cobalt(II) in single-site was tried synthesized through the newly developed method of using sodium silicate as the silica precursor and achieving hydrophobicity ...
    • Introduction of rhenium into porous supports 

      Tafjord, Joakim (Master thesis, 2017)
      This thesis is concerned with the synthesis of porous catalysts containing metallic rhenium nanoparticles. The goals of this work were to evaluate alternative introduction methods to the currently employed incipient wetness, ...
    • Investigating synthesis strategies for materials SAPO-40, AlPO-40 and CuAlPO-40 

      Haraldsen, Anders Granli (Master thesis, 2019)
      Målet med denne oppgaven var å undersøke syntesestrategier for fremstilling av materialene SAPO-40, AlPO-40 og CuAlPO-40, materialer i AFR zeotyp systemet. På grunn av materialenes unike poresystem, potensiale for høyt ...
    • Iridium-based Electrocatalysts for the Oxygen Evolution Reaction 

      Reksten, Anita (Doctoral thesis at NTNU;2016:226, Doctoral thesis, 2016)
      English version: This thesis covers several topics related to the anodic catalyst for the oxygen evolution reaction (OER) in polymer electrolyte membrane (PEM) water electrolysis. Water electrolysis is considered one ...
    • Korleis ulike typar aerogel kan brukast til å fjerne olje frå havet 

      Ertesvåg, Ragnhild Lea (Bachelor thesis, 2020)
      Ei rekkje forsøk har blitt utført opp igjennom tidene for å finne den beste metoden for fjerning av olje frå havet. Metodene som har blitt nytta kan klassifiserast som biologiske, kjemiske og fysiske metodar.[1] Nokre av ...
    • NOx Storage reduction on copper and barium containing micro- and mesoporous materials 

      Yttervik, Johan Hatling (Master thesis, 2013)
      NOx storage reduction (NSR) has been pointed out as a possible solution to meet the stringent emission ceilings for NOx. The NOx storage reduction catalyst is designed to work under cyclic conditions, alternating between ...

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