Ultrasonic irradiation as activity and selectivity improving factor in the hydrogenation of cinnamaldehyde over Pt/SiO2 catalysts

G. Szöllősi, Béla Török, G. Szakonyi, István Kun, M. Bartók

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The effect of ultrasounds on the platinum-catalyzed hydrogenation of cinnamaldehyde was studied in the liquid phase over Pt/SiO2, Pt/Al2O3, Pt/C and EuroPt-1 catalysts under mild experimental conditions (333 K, 1 atm H2). The sonochemical pretreatment was found to be highly beneficial for the selective formation of cinnamyl alcohol (up to 80%) over silica-supported catalysts, besides the significant reaction rate increase (two-fold increase). The actual changes of the catalysts were studied by transmission electron microscopy, and the mechanistic interpretation of the sonochemical effect is also given.

Original languageEnglish
Pages (from-to)225-232
Number of pages8
JournalApplied Catalysis A: General
Volume172
Issue number2
Publication statusPublished - Sep 14 1998

Fingerprint

Hydrogenation
Ultrasonics
Irradiation
Catalysts
Platinum
Catalyst supports
Silicon Dioxide
Reaction rates
Alcohols
Silica
Transmission electron microscopy
Liquids
cinnamic aldehyde
cinnamyl alcohol

Keywords

  • Cinnamaldehyde
  • Hydrogenation
  • Particle size morphology
  • Transmission electron microscopy
  • Ultrasounds

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

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AU - Török, Béla

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AU - Kun, István

AU - Bartók, M.

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AB - The effect of ultrasounds on the platinum-catalyzed hydrogenation of cinnamaldehyde was studied in the liquid phase over Pt/SiO2, Pt/Al2O3, Pt/C and EuroPt-1 catalysts under mild experimental conditions (333 K, 1 atm H2). The sonochemical pretreatment was found to be highly beneficial for the selective formation of cinnamyl alcohol (up to 80%) over silica-supported catalysts, besides the significant reaction rate increase (two-fold increase). The actual changes of the catalysts were studied by transmission electron microscopy, and the mechanistic interpretation of the sonochemical effect is also given.

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