Blar i NTNU Open på forfatter "Rønning, Magnus"
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Fotokatalytisk drivstoff-produksjon gjennom fotoreforming av hydrokarboner
Lien Bjørnstad, Ida (Master thesis, 2011)The purpose of this study is to investigate the photoreforming of methanol for hydrogen production. Since the photocatalysis field needs a cheaper efficient photocatalyst than the more common Pt loaded TiO2, CuO loaded ... -
Hydrophobic Catalyst Support Surfaces by Silylation of γ-Alumina for Co/Re Fischer-Tropsch Synthesis
Rytter, Erling; Salman, Ata ul Rauf; Tsakoumis, Nikolaos; Myrstad, Rune; Yang, Jia; Lögdberg, Sara; Holmen, Anders; Rønning, Magnus (Journal article; Peer reviewed, 2018)Eight different silanes with chloro or methoxy active ligands have been examined to modify the surface of a standard γ-alumina support to investigate the effect of surface acidity and hydrophobicity in Fischer-Tropsch ... -
Identification of carbon species on iron-based catalysts during Fischer-Tropsch synthesis
Pena, Diego; Cognigni, Andrea; Neumayer, Thomas; Van Beek, Wouter; Jones, Debra; Quijada, Melesio; Rønning, Magnus (Journal article; Peer reviewed, 2018)This paper focuses on the use of in situ and ex situ characterisation techniques to provide evidences of carbon species on a commercial iron-based Fischer-Tropsch synthesis catalyst as well as other indices of potential ... -
Improved lifetime and stability of copper species in hierarchical, copper-incorporated CuSAPO-34 verified by catalytic model reactions
Sørli, Guro; Azim, Muhammad Mohsin; Rønning, Magnus; Mathisen, Karina (Peer reviewed; Journal article, 2021)The first successful synthesis of hierarchical CuSAPO-34 (3.9 wt% Cu) is reported using the polymer Pluronic F127 as a mesoporous structure directing agent (SDA). X-Ray absorption spectroscopy (XAS) revealed single site ... -
In situ characterization of industrial catalysts with Raman spectroscopy
Tran, My Nhung Thi (Master thesis, 2018)Raman spectroscopy is one of the most powerful characterization methods for in situ Raman study of catalytic materials and surfaces under working conditions. The use of Raman spectroscopy in catalytic NO oxidation would ... -
In Situ Studies of the Formation of MoP Catalysts and Their Structure under Reaction Conditions for Higher Alcohol Synthesis: The Role of Promoters and Mesoporous Supports
Valle, E.; Duyar, M.S.; Snider, J.L.; Regli, Samuel K.; Rønning, Magnus; Gallo, A.; Jaramillo, T.F. (Journal article; Peer reviewed, 2022) -
Influence of temperature during pyrolysis of Fe-alginate: Unraveling the pathway towards highly active Fe/C catalysts
Tafjord, Joakim; Regli, Samuel K.; Dugulan, Achim Iulian; Rønning, Magnus; Rytter, Erling; Holmen, Anders; Myrstad, Rune; Yang, Jia (Peer reviewed; Journal article, 2022)Transition metals supported on carbons play an important role in catalysis and energy storage. By pyrolysis of metal alginate, highly active catalysts for the Fischer-Tropsch synthesis (FTS) can be produced. However, the ... -
Investigation of the Yara 58-Y1 nitrous oxide decomposition catalyst
Åbø, Karl Magnus (Master thesis, 2014)The YARA 58-Y1 catalyst is a catalyst developed by YARA for the abatement of nitrous oxide created during nitric acid production. It uses cobalt aluminate (Co2AlO4) as its active phase supported on cerium oxide. The active ... -
Influence of H2 on the Oxygen-Assisted Dehydrogenation of Ethane over Al2O3-supported Pt–Sn Catalysts
Radstake, Paul B.; Rønning, Magnus; Holmen, Anders (Journal article; Peer reviewed, 2018)The oxygen-assisted dehydrogenation of ethane at 650 °C shows that adding Sn to the Pt catalyst results in increased conversion and selectivity to ethylene. Even the smallest amount of tin (0.16 wt%) has a significant ... -
Low Temperature Selective Hydrogenation Using Pd/Al2O3 Catalysts
Røed, Ingvill Andrea (Master thesis, 2020) -
Multivariate curve resolution applied to in situ X-ray absorption spectroscopy data: An efficient tool for data processing and analysis
Voronov, Alexey; Urakawa, Atsushi; van Beek, Wouter; Tsakoumis, Nikolaos; Emerich, Hermann; Rønning, Magnus (Journal article; Peer reviewed, 2014)Large datasets containing many spectra commonly associated with in situ or operando experiments call for new data treatment strategies as conventional scan by scan data analysis methods have become a time-consuming bottleneck. ... -
Nanostructural Analysis of Co-Re/γ-Al2O3 Fischer-Tropsch Catalyst by TEM and XRD
Dehghan-Niri, Roya; Tsakoumis, Nikolaos E.; Voronov, Alexey; Holmen, Anders; Holmestad, Randi; Vullum, Per Erik; Borg, Øyvind; Rytter, Erling; Rønning, Magnus; Walmsley, John (Journal article; Peer reviewed, 2022)A rhenium promoted Fischer-Tropsch (FT) cobalt catalyst supported on γ-Al2O3 has been investigated by Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD), before and after reduction. Electron diffraction, ... -
New catalysts for low-temperature selective catalytic reduction (SCR)
Bjørkedal, Ole Håvik (Master thesis, 2016)Mesoporous alumina with a regular pore structure and high surface area was prepared using a sol-gel method with a structure-guiding surfactant. The typical diameter of the pores were measured to be 4-6 nm, with narrow pore ... -
Nickel and Iron Poisoning of Copper Based Methanol Synthesis Catalysts
Wigum, Stine Hagen (Master thesis, 2015)Discharged methanol synthesis catalysts are known to contain various amounts of nickel and iron. The purpose of this master thesis was to study nickel and iron poisoning of commercial copper based methanol synthesis catalysts ... -
Nickel Promoted Cobalt Fischer-Tropsch Catalysts - Effect of Nickel on reducibility and Cobalt dispersion
Evenrud, Vegar (Master thesis, 2012)The effect of nickel promotion in cobalt Fischer-Tropsch catalysts towards reducibility and cobalt dispersion was investigated. A series of catalysts loaded with 20% Co and 0-10% Ni on gamma-alumina were impregnated by the ... -
Nitrogen-containing carbon nanofibers as supports for bimetallic Pt-Mn catalysts in aqueous phase reforming of ethylene glycol
Pazos Urrea, Monica; Herold, Felix; Chen, de; Rønning, Magnus (Peer reviewed; Journal article, 2023)Aqueous phase reforming (APR) of ethylene glycol was performed at 225 °C and 30 bar in batch and continuous reaction conditions. The effect on the APR performance by functionalizing carbon supports with nitrogen and adding ... -
Nitrogen-doped carbon nanofiber catalyst for ORR in PEM fuel cell stack: Performance, durability and market application aspects
Bokach, Dmitry; ten Hoopen, Sander; Muthuswamy, Navaneethan; Buan, Marthe Emelie Melandsø; Rønning, Magnus (Journal article; Peer reviewed, 2016)A noble metal-free catalyst based on N-doped carbon nanofibers supported on graphite (N-CNF1 ) was employed for the oxygen reduction at the cathode of a Nafion PEMFC with a commercial Pt/C anode. Obtained performance in ... -
Nitrogen-Doped Carbon Nanofibers as Pt-Free Catalyst in the Oxygen Reduction Reaction - A study of iron nanoparticles as N-CNF catalyst on different supports
Barsnes, Anne Helene (Master thesis, 2015)A new approach was tested as nitrogen-doped carbon nanofibers (N-CNFs) were synthesized by using uniformly sized iron nanoparticles (FeNPs) on two different support as their growth catalyst. The N-CNFs are designed as a ... -
Nitrogen-doped Carbon Nanofibers for the Oxygen Reduction Reaction
Buan, Marthe Emelie Melandsø (Doctoral theses at NTNU;2017:78, Doctoral thesis, 2017)Summary of thesis: One of the major obstacles for the commercialization of fuel cells is the necessity for high cost noble metals to facilitate the electrode reactions. Especially the oxygen reduction reaction (ORR) is ... -
Nitrogen-doped Carbon Nanofibers for the Oxygen Reduction Reaction: Importance of the Iron Growth Catalyst Phase
Buan, Marthe Emelie Melandsø; Muthuswamy, Navaneethan; Walmsley, John; Chen, De; Rønning, Magnus (Journal article; Peer reviewed, 2017)A systematic evaluation of the oxygen reduction reaction (ORR) on nitrogen-doped carbon nanofibers (N-CNFs) has been performed by tuning the properties of the N-CNFs by using chemical vapor deposition. Analysis of the ...