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

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

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

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

OriginalspracheEnglisch
Seiten (von - bis)64-73
Seitenumfang10
FachzeitschriftCatalysis today
Jahrgang383
PublikationsstatusVeröffentlicht - 1 Jan. 2022
Peer-Review-StatusJa
Extern publiziertJa

Schlagworte

ASJC Scopus Sachgebiete

Schlagwörter

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