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Svelle, Stian; Lundegaard, Lars Fahl; Beato, Pablo & Wragg, David Stephen
(2023).
Case Studies: Crystallography as a Tool for Studying Methanol Conversion in Zeolites,
Springer Handbook of Advanced Catalyst Characterization.
Springer.
ISSN 978-3-031-07125-6.
p. 541–563.
doi:
10.1007/978-3-031-07125-6_26.
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Capel Berdiell, Izar; Wragg, David Stephen; Beato, Pablo; Lundegaard, Lars Fahl; Di Michel, Marco & Svelle, Stian
(2023).
Temperature Programmed Oxidation Probed
with X-ray Diffraction Computed Tomography.
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Fjermestad, Torstein; Uglietti, Riccardo; Micale, Daniele; Bracconi, Mauro; Phan, Anh & Striolo, Alberto
[Show all 9 contributors for this article]
(2023).
Modelling the methanol to dimethyl ether reaction – coupling kinetic with transport from Å to cm scale.
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Svelle, Stian
(2023).
Zeolite catalysis research at the University of Oslo.
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Svelle, Stian; Capel Berdiell, Izar; Wragg, David Stephen; Beato, Pablo & Lundegaard, Lars Fahl
(2023).
In situ and operando X-ray diffraction as a tool to monitor zeolite catalyst deactivation
.
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Fjermestad, Torstein; Uglietti, Riccardo; Micale, Daniele; Bracconi, Mauro; Phan, Anh & Striolo, Alberto
[Show all 9 contributors for this article]
(2023).
Modelling the Methanol to Dimethyl Ether Reaction – Coupling Kinetics with Transport from CM to Å Scale.
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Fjermestad, Torstein; Uglietti, Riccardo; Micale, Daniele; Bracconi, Mauro; Phan, Anh & Striolo, Alberto
[Show all 9 contributors for this article]
(2023).
Modelling the Methanol to Dimethyl ether reaction – coupling kinetics with transport from CM to Å scale.
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Capel Berdiell, Izar; König, Nico; Junge, Nicolai Haaber; Kalantzopoulos, Georgios; Beato, Pablo & Svelle, Stian
[Show all 8 contributors for this article]
(2022).
Tracking deactivation level of zeolite H-beta catalysts with novel XRD models.
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Capel Berdiell, Izar; Braghin, Giorgio Bruno; Cordero-Lanzac, Tomas; Beato, Pablo; Lundegaard, Lars Fahl & Wragg, David Stephen
[Show all 8 contributors for this article]
(2022).
Tracking Structural Deactivation of H-Ferrierite Zeolite Catalyst during MTH with XRD.
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Kvande, Karoline; Prodinger, Sebastian; Borfecchia, Elisa; Garetto, Beatrice; Solemsli, Bjørn Gading & Signorile, Matteo
[Show all 10 contributors for this article]
(2022).
Structural and mechanistic investigations of CuxOy- sites in zeolites and their role in the direct activation of lower alkanes.
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Svelle, Stian
(2022).
Monitoring the coking and deactivation of zeolite catalyst H-beta with X-ray diffraction.
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Fjermestad, Torstein; Uglietti, Riccardo; Micale, Daniele; Bracconi, Mauro; Phan, Anh & Striolo, Alberto
[Show all 9 contributors for this article]
(2022).
Modelling the Methanol to Dimethyl ether reaction – coupling kinetics with transport from Å to CM scale.
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Kvande, Karoline; Bordiga, Silvia; Beato, Pablo & Svelle, Stian
(2022).
Ethane to ethylene over Cu loaded zeolites.
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Kvande, Karoline; Garetto, Beatrice; Svelle, Stian & Borfecchia, Elisa
(2022).
Employing TPR to describe activity differences in the Methane-to-Methanol reaction over two different Cu-MOR.
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Kvande, Karoline; Bordiga, Silvia; Beato, Pablo & Svelle, Stian
(2022).
Cu-loaded mordenites for the activation of ethane to ethene in a stepwise, cyclic conversion protocol.
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Solemsli, Bjørn Gading; Kvande, Karoline; Prodinger, Sebastian & Svelle, Stian
(2022).
Fuels & Chemicals from Methane.
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Solemsli, Bjørn Gading; Svelle, Stian; Kvande, Karoline & Prodinger, Sebastian
(2022).
Direct Synthesis to Methanol from Methane over Cu-Zeolites
.
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Solemsli, Bjørn Gading; Svelle, Stian; Prodinger, Sebastian & Kvande, Karoline
(2022).
Methylation of Lower alkenes though stepwise reaction with methane.
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Kvande, Karoline; Svelle, Stian; Pappas, Dimitrios K; Borfecchia, Elisa; Martini, Andrea & Bordiga, Silvia
[Show all 7 contributors for this article]
(2021).
Methane to methanol conversion over Cu-zeolites – structure performance relationships.
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Prodinger, Sebastian; Svelle, Stian & Beato, Pablo
(2021).
On the Role of Ions in the Formation of Zeolites.
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Fjermestad, Torstein; Micale, Daniele; Ahn, Phan; Striolo, Alberto; Stamatakis, Michail & Iacoviello, Francesco
[Show all 8 contributors for this article]
(2021).
The effective diffusivity bridges the kinetics at the active sites and the fluid flow in the reactor.
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Arstad, Bjørnar; Dyballa, Michael Martin; Thorshaug, Knut; Pappas, Dimitrios K; Borfecchia, Elisa & Kvande, Karoline
[Show all 12 contributors for this article]
(2020).
Solid State NMR studies of the stepwise transformation of methane to methanol over Cu-Zeolites.
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Kvande, Karoline & Svelle, Stian
(2020).
New paths for “direct activation of lower alcanes”.
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Kvande, Karoline; Svelle, Stian & Beato, Pablo
(2020).
CH4-TPR: A good descriptor for optimizing the direct conversion of methane-to-methanol?
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Helgaker, Trygve; Svelle, Stian & Haugnes, Gunhild Merete
(2019).
Datakraft gir forskerne bedre intuisjon og flere ideer.
[Newspaper].
Titan.uio.no.
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Svelle, Stian
(2019).
Methane to methanol conversion over Cu-zeolites.
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Svelle, Stian
(2019).
Spatiotemporal studies of the deactivation of zeolites by coking during the conversion of methanol to hydrocarbons.
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Svelle, Stian
(2019).
Direct conversion of methane (to methanol): Is it feasible?
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Bjørgen, Morten; Eilertsen, Heidi; Gjengedal, Elin Lovise Folven; Maarten, Aerts & Svelle, Stian
(2019).
Bruk av kontrollkort i kjemilaboratoriet – hvorfor, hvordan og hvordan ikke.
Kjemi.
ISSN 0023-1983.
3,
p. 22–27.
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Dyballa, Michael Martin; Pappas, Dimitrios; Borfecchia, Elisa; Kvande, Karoline; Bordiga, Silvia & Berlier, Gloria
[Show all 11 contributors for this article]
(2019).
Cu-MOR applied in the stepwise methane-to-methanol conversion.
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Groppo, Elena; Svelle, Stian & De Vos, Dirk
(2018).
Understanding and Design Catalysts from Molecular to Material Scale: One of the Five Grand-Challenges for Catalysis at the 13th European Congress on Catalysis.
Topics in catalysis.
ISSN 1022-5528.
61(14),
p. 1383–1384.
doi:
10.1007/s11244-018-1034-y.
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Svelle, Stian
(2018).
Zeolite catalysis at the University of Oslo.
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Svelle, Stian
(2018).
Coking of zeolite ZSM-5 during the conversion of methanol to hydrocarbons monitored by X-ray diffraction tomography.
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Svelle, Stian
(2018).
Zeolite research in the Catalysis group at the University of Oslo – Three case studies.
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Pappas, Dimitrios; Borfecchia, Elisa; Dyballa, Michael Martin; Berlier, Gloria; Bordiga, Silvia & Olsbye, Unni
[Show all 8 contributors for this article]
(2018).
FOLLOWING O2-ACTIVATION OF CU-ZEOLITES WITH TIME-RESOLVED XAS.
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Pappas, Dimitrios; Borfecchia, Elisa; Berlier, Gloria; Beato, Pablo & Svelle, Stian
(2018).
Methane to Methanol over Cu-Zeolites: Establishing Structure-Activity Relationships.
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Pappas, Dimitrios; Borfecchia, Elisa; Dyballa, Michael Martin; Martini, Andrea; Lomachenko, Kirill A. & Berlier, Gloria
[Show all 11 contributors for this article]
(2018).
Methane to Methanol over Cu-Zeolites: Establishing Structure-Activity Relationships.
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Olsbye, Unni; Mortén, Magnus; Mentel, Lukasz; Lazzarini, Andrea; Pankin, Ilya & Lamberti, Carlo
[Show all 10 contributors for this article]
(2018).
On the influence of catalyst acid strength in the Methanol to Hydrocarbons (MTH) and related reactions.
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Pappas, Dimitrios; Borfecchia, Elisa; Dyballa, Michael Martin; Pankin, Ilia A.; Lomachenko, Kirill A. & Martini, Andrea
[Show all 16 contributors for this article]
(2017).
XAS reveals structure-activity relationships for the Methane-to-Methanol conversion over Cu-zeolites.
ESRF Highlights of the Year.
p. 49–51.
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Pinilla Herrero, Irene; Borfecchia, Elisa; Mentzel, Uffe V.; Joensen, Finn; Lillerud, Karl Petter & Olsbye, Unni
[Show all 10 contributors for this article]
(2017).
Dehydrogenation vs hydrogen transfer activity of Zn-ZSM-5 catalytic systems in methanol conversion to aromatics.
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Pinilla Herrero, Irene; Borfecchia, Elisa; Mentzel, Uffe V.; Joensen, Finn; Olsbye, Unni & Lamberti, Carlo
[Show all 9 contributors for this article]
(2017).
High Zn/Al ratios enhance the dehydrogenation activity of Zn_ZSM-5 catalytic systems in methanol conversion to aromatics.
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Bjørgen, Morten; Svelle, Stian; Angell Eid, Hilde M. & Aerts, Maarten
(2017).
Måler vi rikitg? Sammenlignende laboratorieprøving – hva, hvorfor og hvordan!
Kjemi.
ISSN 0023-1983.
3,
p. 4–7.
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Svelle, Stian
(2017).
Experimental and theoretical studies of reversible and irreversible zeolite catalyst deactivation.
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Svelle, Stian
(2017).
Spatiotemporal studies of the deactivation of zeolites by coking.
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Svelle, Stian
(2017).
Ab initio molecular dynamics and microkinetic modeling of zeolite dealumination.
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Kvande, Karoline & Svelle, Stian
(2023).
Compositional and Mechanistic Studies of Cu-zeolites for the Direct Activation of Lower Alkanes.
University of Oslo, Faculty of Mathematics and Natural Sciences, Department of Chemistry.
ISSN 1501-7710.
2023(2633).
Show summary
Due to poor access and energy-intensive conversion reactions, large reservoirs of natural gas are underutilized. Natural gas and biogas mainly contain small and stable hydrocarbons (light alkanes) and could be a more sustainable resource in the nearest future for the chemical industry, compared to coal and oil. However, due to the stability of alkanes, it is notoriously difficult to make specific products, because, in a reaction, the products are usually more reactive, and unwanted by-products are formed. With the help of activity testing and multiple characterization techniques, we have obtained insight into a direct, but stepwise pathway to convert alkanes to functionalized products for the industry that is potentially less energy-demanding than the existing ones. The stepwise pathway proceeds over oxidized Cu ions anchored to porous materials (zeolites) that hinder the reactants and products from interacting. With this approach, there is almost no over-oxidation, although, the product yield per time from this reaction is low. Accordingly, our focus has been on exploring different parts of the reaction to understand the individual steps and how they can be improved. We have obtained more insight into the Cu speciation and found important activity relationships with both zeolite structure and Cu ion reducibility.
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Kumar, Sushant; Svelle, Stian & Lillerud, Karl Petter
(2020).
Potentiometric acid-base titration as a tool to characterize porous solid acids.
Universitetet i Oslo.
Show summary
Potentiometric acid-base titration was introduced to measure pKa values (Brønsted acidity) of protons in Zr_6-based metal-organic frameworks (MOFs), including UiO-type MOFs and MOF-808. The pKa values of three typical types of proton present in these MOFs, μ_3-OH, Zr - OH_2, and Zr – OH were evaluated. The two latter protons are assumed to mainly originate from missing linker. From structural characterization using techniques such as TGA, NMR, and EDS, it seemed to not entirely be the case, since standard UiO-66-BDC was observed to not have any defects from the linkers, and the small amount of chloride detected may originate from the pores of the material rather than being part of the structure. Also, one of the two standard UiO-67s (UiO-67-400) which was amorphous, could seemingly detect protons similar to the other crystalline UiO-67-PM MOF and literature. This weakens the hypothesis that potentiometric acid-base titration is a good method to characterize MOFs. All materials were characterized by PXRD, SEM/EDS, TGA, and N2-adsorption. Additionally, the acidic properties of the titrated samples were compared with MP-AES, EDS, and TPD for zeolites and FT-IR for MOFs. FT-IR was applied to discover the same Brønsted acids that were detected by potentiometric acid-base titration. The μ_3-OH proton could be found with both techniques, but the others could not be detected by the preliminary FT-IR measurements that were carried out. Potentiometric acid-base titration was also used to find the available acid site density for commercial zeolites, involving H-USY (FAU), H-BEA-25 (*BEA), and H – β (*BEA), and H-ZSM-5 (MFI). MP-AES and EDS revealed a higher Si/Al ratio (lower Al content) in all the zeolites compared with the value that was provided by the suppliers. This would predict that fewer amount of acid sites would be detected when using potentiometric titration and TPD, which appeared to be the case. The results indicated good agreement between potentiometric acid-base titration and TPD since the measured density acid sites (μmol/g) showed values comparable to each other. This was especially the case for zeolites with low Al content.
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Ibishi, Diamanta & Svelle, Stian
(2019).
The conversion of methanol to olefins reaction has been tested over synthesized and commercial SAPO-11, where the supplied and synthesized materials inhibit different morphology, surface area, and acid sites density. The synthesized samples were synthesized with the hydrothermal method and the effect of static and rotational crystallization in a temperature range of 150 to 180 °C were investigated for prepared synthesis mixtures. All samples were characterized by PXRD, SEM, TGA, N2 physisorption.
Universitetet i Oslo.
Show summary
The conversion of methanol to olefins reaction has been tested over synthesized and commercial SAPO-11, where the supplied and synthesized materials inhibit different morphology, surface area, and acid sites density. The synthesized samples were synthesized with the hydrothermal method and the effect of static and rotational crystallization in a temperature range of 150 to 180 °C were investigated for prepared synthesis mixtures. All samples were characterized by PXRD, SEM, TGA, N2 physisorption, MP-AES, EDS, and CO-FTIR. The results obtained, indicated a systematic decrease in the measured diameter (µm) for the synthesized SAPO-11 aggregates. The trend was reported as a function of increased temperature under both static and rotational conditions. This screening also revealed that the most uniform SAPO-11 aggregates were obtained at high crystallization temperature. Elemental analysis showed the silicon content for the as-synthesized SAPO-11 was 10 times lower than the supplied SAPO-11. This finding was linked to the difference in catalytic activity observed between commercial SAPO-11 and synthesized SAPO-11 at 180 °C. Performance test revealed methanol to olefins conversion was feasible for both supplied and synthesized samples. The supplied SAPO-11 sample showed an initial higher methanol conversion towards hydrocarbon formation, whilst the in-house synthesized samples inhibited a similar behavior at lower conversion percentages. All tested samples obtained highest selectivities toward C5+ hydrocarbons. Nevertheless, synthesized samples proved to be more stable and selective towards the C2-C4 hydrocarbons compared to the commercial sample.
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Kvande, Karoline; Svelle, Stian; Dyballa, Michael Martin & Pappas, Dimitrios
(2019).
A Study of Cu-loaded SAPO-34 for the Direct Conversion of Methane to Methanol.
Universitetet i Oslo.
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