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Cobalt-Fischer-Tropsch catalyst regeneration: the crucial role of the Kirkendall effect for cobalt redispersion

By CJ Kees-Jan Weststrate, MM Hauman and DJ Denzil Moodley

Abstract

Redispersion of cobalt is a key process during Fischer–Tropsch catalyst regeneration. Using model catalysts we show that redispersion is a two step process. Oxidation of supported metallic cobalt nanoparticles produces hollow oxide particles by the Kirkendall effect; reduction leads to break-up of these hollow oxide shells, forming multiple metallic particles. This mechanism is to a large extent independent of the support

Publisher: 'Springer Fachmedien Wiesbaden GmbH'
Year: 2011
OAI identifier: oai:library.tue.nl:721359
Provided by: Repository TU/e
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