The Disputation will be live streamed for everyone else.
The livestream will be activated 15 minutes before the Defense starts.
Trial lecture
November 13, 10:15 Undervisningsrom 2602, Livsvitenskapsbygget, Gaustad
Trial lecture title: “Deactivation and regeneration of fluid catalytic cracking catalysts”
Conferral summary / Kreeringssammendrag
Vi har laget bedre katalysatorer for pyrolyse av plast ved å innføre sekundær porøsitet i zeolittene. Videre så vi at impregnering med kalsium og magnesium førte til endringer i katalysatorenes levetid, produktfordeling og de forbindelsene som fanges i katalysatorens hulrom og porer ved omsetning av metanol til hydrokarboner. Funnene gir ny innsikt i hvordan slike modifikasjoner påvirker katalysatorene, og arbeidet utvider den eksisterende kunnskapen om slike materialer.
Main research findings / Hovedfunn
Zeolites are porous crystalline materials widely used as catalysis or adsorbents thanks to their interesting intrinsic properties. Chemical reactions may occur within the cavities, but only molecules smaller than the latter can access and exit the pores. However, molecules may not exit the pores and accumulate inside instead. To mitigate this, larger cavities can be introduced in the zeolite to improve the movement of molecules to and from the pores. Moreover, additional species can be included within the pores to tune the performance of the catalyst.
This thesis focused on evaluating the effectiveness of the modifications imparted to zeolites by using the catalysts in the pyrolysis of different polymers and in the methanol-to-hydrocarbons reaction.
This work highlighted the importance of improving the accessibility to the inner cavities of zeolites when these were used with bulky molecules, like polymers. Additionally, it underlined that the thermal behavior of the polymers also influenced how efficient the zeolite is. The presence of the modified catalysts also altered the products formed in this reaction. The combination of additional porosity and loaded species within the pores of the zeolite also affected its performance in the methanol-to-hydrocarbons reaction altering the catalyst lifetime, products, and type of molecules trapped within its pores.
Ultimately, this work gives insights in how different zeolite modifications affect the catalyst performance within different reactions, expanding what was previously known for different type of zeolites.
Candidate contact information
LinkedIn: https://www.linkedin.com/in/claudia-fabris95/?isSelfProfile=true
Email: claudif@uio.no
Adjudication committee
Professor Carsten Sievers
Georgia Tech`s School of Chemical and Biomolecular Engineering, Collage of Engineering, Atlanta, USA
Vice dean Karina Mathisen
Department of Chemistry and Biomedical Science, Faculty of Natural Sciences, NTNU, Norway
Professor Steven Wilson
Department of Chemistry, University of Oslo, Norway
Chair of defence
Professor Ola Nilsen
Department of Chemistry, University of Oslo, Norway
Supervisors
Professor Stian Svelle
Department of Chemistry, University of Oslo, Norway
Professor Silvia Bordiga
Department of Chemistry, Torino University, Italy
Professor Unni Olsby
Department of Chemistry, University of Oslo, Norway
Sebastian Prodinger
Topsoe A/S Kgs. Lyngby, Denmark
Professor Thomas Cordero-Lanzac
Universidad de Málaga, Spain