Effect of calcination conditions on the dispersion of cobalt Over Re, Ru and Rh promoted Co/γ-Al₂O₃ catalysts
|Author:||Romar, Henrik1,2; Rivoire, Eric3; Tynjälä, Pekka1,2;|
1Research Unit of Sustainable Chemistry, University of Oulu, Oulu, Finland
2Applied Chemistry, Kokkola University Consortium Chydenius, University of Jyväskylä, Kokkola, Finland
3UFR de Chimie-Biologie, Université Joseph Fourier, Grenoble Cedex 9, France
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe201706157290
|Publish Date:|| 2018-05-30
The effects of catalyst calcination conditions, such as calcination temperature and calcination atmosphere composition on the dispersion of cobalt particles over Co/γ-Al₂O₃ catalysts for Fischer–Tropsch conversion of synthesis gas are studied. A number of catalysts were prepared by incipient wetness impregnation of 20-wt% of cobalt onto γ-Al₂O₃ and promoted with 0.5 wt% ruthenium, rhenium, and rhodium. Metal dispersions of active metals were studied by chemisorption of carbon monoxide. The highest dispersion for Co/γ-Al₂O₃ catalyst was achieved by calcination at 400 °C in a flow of N₂. Co metal dispersion seem to be increased in the calcination steps if a flowing gas was used instead of static calcination conditions. The addition of promoter metals like Ru, Re or Rh enhances the dispersion of the active metal.
Topics in catalysis
|Pages:||1408 - 1414|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
The authors gratefully acknowledge the EU/Interreg Nord program (project no. 304-8488-10) for their financial support within the HighBio2 project. Rhodium nitrate and ruthenium nitrate solutions were provided by Umicore, Germany while Puralox SSCa 5-200 support was provided by Sasol Germany.
© Springer Science+Business Media New York 2017. The final publication is available at Springer via http://dx.doi.org/10.1007/s11244-017-0822-0