CatLab Lecture
Freitag, 26. Januar 2024 // 10.30 - 12.00
Helmholtz-Zentrum Berlin, Fritz Haber Institute
Albert-Einstein-Straße 15,
12489 Berlin
BESSY II, Großer Hörsaal
A series of independent lectures with renowned experts in the fields of heterogeneous catalysis, thin film technology, physical chemistry, process engineering and material design. Jointly organised by Helmholtz-Zentrum Berlin and the Fritz Haber Institute as part of CatLab, these lectures offer a unique opportunity to explore the fundamentals and latest developments in catalysis research.
Winter semester 2023/24 – every friday from 10:30 - 12:00
Magnetic characterisation of catalysts for energy applications
Michael Claeys, University of Cape Town
The University of Cape Town, in collaboration with Sasol Technology, has developed an operandomagnetometer, which allows to study ferromagnetic catalysts at industrial conditions of high temperature (>800°C) and high pressure (>50 bar) [1]. This unique set-up can be used to study phase changes (such as reduction, oxidation and carburization) as well as crystallites size changes. In certain cases even crystallite size distributions of the magnetic phase can be obtained. Importantly, while studying these changes, fully relevant kinetic data can be measured on this flow through fixed bed reactor system so that the catalyst performance can be directly linked to its current state. Examples of investigations on energy materials conducted with the set-up, which inform catalyst and process design, will be presented and these include, inter alia:
- Crystallite size dependent oxidation of cobalt, iron and nickel CO hydrogenation catalysts.
- Sintering of a cobalt and nickel CO hydrogenation catalyst as function of process conditions.
- Role of carbides in cobalt based Fischer-Tropsch synthesis.
- Leaching of cobalt from Pt-Co fuel cell catalysts.
[1] M. Claeys, E. van Steen, J.L Visagie, J. van de Loosdrecht, PCT Patent WO2010/004419 A2, 9 July 2009.
Contact for content-related questions:
Annette Trunschke (FHI)