Karoline Kvande

• Kvande, Karoline; Pappas, Dimitrios; Borfecchia, Elisa & Lomachenko, Kirill A. (2020). Advanced X‐ray Absorption Spectroscopy Analysis to Determine Structure‐Activity Relationships for Cu‐Zeolites in the Direct Conversion of Methane to Methanol. ChemCatChem. ISSN 1867-3880. 12, s. 2385–2405. doi: 10.1002/cctc.201902371.
• Martini, Andrea; Signorile, Matteo; Negri, Chiara; Kvande, Karoline; Lomachenko, Kirill A. & Svelle, Stian [Vis alle 10 forfattere av denne artikkelen] (2020). EXAFS wavelet transform analysis of Cu-MOR zeolites for the direct methane to methanol conversion. Physical Chemistry, Chemical Physics - PCCP. ISSN 1463-9076. 22, s. 18950–18963. doi: 10.1039/D0CP01257B.
• Pappas, Dimitrios; Kvande, Karoline; Kalyva, Maria Evangelou; Dyballa, Michael Martin; Lomachenko, Kirill A. & Arstad, Bjørnar [Vis alle 11 forfattere av denne artikkelen] (2020). Influence of Cu-speciation in mordenite on direct methane to methanol conversion: Multi-Technique characterization and comparison with NH3 selective catalytic reduction of NOx. Catalysis Today. ISSN 0920-5861. s. 1–7. doi: 10.1016/j.cattod.2020.06.050. Fulltekst i vitenarkiv
• Kvande, Karoline; Pappas, Dimitrios; Dyballa, Michael Martin; Buono, Carlo; Signorile, Matteo & Borfecchia, Elisa [Vis alle 13 forfattere av denne artikkelen] (2020). Comparing the Nature of Active Sites in Cu-loaded SAPO-34 and SSZ-13 for the Direct Conversion of Methane to Methanol. Catalysts. ISSN 2073-4344. 10(191). doi: 10.3390/catal10020191. Fulltekst i vitenarkiv
• Dyballa, Michael Martin; Thorshaug, Knut; Pappas, Dimitrios; Borfecchia, Elisa; Kvande, Karoline & Bordiga, Silvia [Vis alle 12 forfattere av denne artikkelen] (2019). Zeolite surface methoxy groups as key intermediates in the stepwise conversion of methane to methanol. ChemCatChem. ISSN 1867-3880. 11(20), s. 5022–5026. doi: 10.1002/cctc.201901315. Fulltekst i vitenarkiv Vis sammendrag

  This contribution clarifies the overoxidation-preventing key step in the methane-to-methanol (MTM) conversion over copper mordenite zeolites. We followed the methane-to-methanol conversion over copper mordenite zeolites by NMR spectroscopy supported by DRIFTS to show that surface methoxy groups (SMGs) located at zeolite Brønsted sites are the key intermediates. The SMGs with chemical shift of 59 ppm are identical to those formed on a copper-free reference zeolite after reaction with methanol and react with water, methanol, or carbon monoxide to yield methanol, dimethyl ether, and acetate. This reactivity corroborates the location of SMGs at Brønsted sites. We find no evidence for stable SMGs directly at copper sites and explain mechanistically why H-form mordenites outperform their Na-form analogues. This finding is of interest for any future process that tries to trap the intermediate methane oxidation product towards methanol.

• Dyballa, Michael Martin; Pappas, Dimitrios; Kvande, Karoline; Borfecchia, Elisa; Arstad, Bjørnar & Beato, Pablo [Vis alle 8 forfattere av denne artikkelen] (2019). On how copper mordenite properties govern the framework stability and activity in the methane-to-methanol conversion. ACS Catalysis. ISSN 2155-5435. 9(1), s. 365–375. doi: 10.1021/acscatal.8b04437.
• Buono, Carlo; Martini, Andrea; Pankin, Ilya; Pappas, Dimitrios; Negri, Chiara & Kvande, Karoline [Vis alle 8 forfattere av denne artikkelen] (2018). Local structure of Cu(I) ions in the MOR zeolite: A DFT-assisted XAS study. Radiation Physics and Chemistry. ISSN 0969-806X. doi: 10.1016/j.radphyschem.2018.12.031.
• Pappas, Dimitrios; Martini, Andrea; Dyballa, Michael Martin; Kvande, Karoline; Teketel, Shewangizaw & Lomachenko, Kirill A. [Vis alle 16 forfattere av denne artikkelen] (2018). The nuclearity of the active site for methane to methanol conversion in Cu-mordenite: a quantitative assessment. Journal of the American Chemical Society. ISSN 0002-7863. 140(45), s. 15270–15278. doi: 10.1021/jacs.8b08071. Fulltekst i vitenarkiv

Se alle arbeider i Cristin

• Kvande, Karoline; Svelle, Stian; Pappas, Dimitrios K; Borfecchia, Elisa; Martini, Andrea & Bordiga, Silvia [Vis alle 7 forfattere av denne artikkelen] (2021). Methane to methanol conversion over Cu-zeolites – structure performance relationships.
• Arstad, Bjørnar; Dyballa, Michael Martin; Thorshaug, Knut; Pappas, Dimitrios K; Borfecchia, Elisa & Kvande, Karoline [Vis alle 12 forfattere av denne artikkelen] (2020). Solid State NMR studies of the stepwise transformation of methane to methanol over Cu-Zeolites.
• Kvande, Karoline & Svelle, Stian (2020). New paths for “direct activation of lower alcanes”.
• Kvande, Karoline; Svelle, Stian & Beato, Pablo (2020). CH4-TPR: A good descriptor for optimizing the direct conversion of methane-to-methanol?
• Kvande, Karoline (2019). Direct methane to methanol conversion: comparing the activity of Cu-SAPO-34 and Cu-SSZ-13.
• Kvande, Karoline (2019). Comparing the Nature of the Active Sites in Cu-loaded SAPO-34 and SSZ-13 for the Direct Conversion of Methane to Methanol.
• Kvande, Karoline (2019). DIRECT CONVERSION OF METHANE TO METHANOL - A more Sustainable Solution.
• Dyballa, Michael Martin; Pappas, Dimitrios; Borfecchia, Elisa; Kvande, Karoline; Bordiga, Silvia & Berlier, Gloria [Vis alle 11 forfattere av denne artikkelen] (2019). Cu-MOR applied in the stepwise methane-to-methanol conversion.
• Kvande, Karoline (2017). Direct conversion of methane to methanol.
• 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.

Se alle arbeider i Cristin