Preparation of γ-Al2O3/α-Al2O3 ceramic foams as catalyst carriers via the replica technique

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Vladimir Shumilov - , Åbo Akademi University (Author)
  • Alexey Kirilin - , Åbo Akademi University (Author)
  • Anton Tokarev - , Åbo Akademi University (Author)
  • Stephan Boden - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Markus Schubert - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Uwe Hampel - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Leena Hupa - , Åbo Akademi University (Author)
  • Tapio Salmi - , Åbo Akademi University (Author)
  • Dmitry Yu Murzin - , Åbo Akademi University (Author)

Abstract

This work describes an effective method for the preparation of open-cell ceramic foams for their further use as catalyst supports. The polyurethane sponge replica technique was applied using a ceramic suspension based on a mixture of α-alumina, magnesia and titania and polyvinyl alcohol solution as a liquid component. The polyurethane sponge was etched with NaOH and covered with colloidal silica to obtain better adhesion of the slurry to the walls of the polymeric material onto it. The surface area of the ceramic carrier was increased by adding a layer of γ-alumina. Deposition of an active catalytic phase (Pt) was done by impregnation. Properties of the carriers and the final catalyst were investigated by a number of physico-chemical methods such as TEM, SEM, XRD and computer tomography. Hydrogenation of ethyl benzoylformate was performed to elucidate the catalytic properties of foam catalysts illustrating their applicability.

Details

Original languageEnglish
Pages (from-to)64-73
Number of pages10
JournalCatalysis today
Volume383
Publication statusPublished - 1 Jan 2022
Peer-reviewedYes
Externally publishedYes

Keywords

ASJC Scopus subject areas

Keywords

  • Catalytic foams, Hydrogenation of ethylbenzoylformate, Macroporous ceramics, γ-AlO/α- AlO