Transformations of cyclohexene oxide over silica-supported Cu, Pd, and Rh catalysts in H2/D2 atmosphere

András Fási, I. Pálinkó

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Transformations of cyclohexene oxide were studied in a recirculation reactor and a flow system over silica-supported transition and early transition metal catalysts. Hydrogen pressure dependence of the transformations was measured over Cu/SiO2 at 403 K in the 0-98.7 kPa range. Deuterium distribution in the reactant and products were determined at 20 kPa D2 pressure. The reactions were studied in the flow reactor under D2 stream over Cu/SiO2 (373 K, 403 K, 443 K, 523 K), Pd/SiO2 (403 K), and Rh/SiO2 (403 K) catalysts too. Deuterium distributions were determined at the commonly used 403 K. Over each catalyst, in both reactor types three main transformation pathways were found. Single C-O scission occurred via isomerization and hydrogenation. Double C-O cleavage, that is, deoxygenation was also found to be important. Product distribution varied from catalyst to catalyst and it was influenced by the conditions, as well as the reactor types. Deuterium distribution revealed significant differences in the elementary surface processes over the catalysts. Detailed mechanistic interpretation of the transformations is offered.

Original languageEnglish
Pages (from-to)28-36
Number of pages9
JournalJournal of Catalysis
Volume181
Issue number1
Publication statusPublished - 1999

Fingerprint

Silicon Dioxide
Silica
silicon dioxide
catalysts
atmospheres
Catalysts
Oxides
oxides
Deuterium
reactors
deuterium
cleavage
deoxygenation
products
Isomerization
pressure dependence
isomerization
Hydrogenation
hydrogenation
Transition metals

Keywords

  • Cu/SiO
  • Cyclohexene oxide
  • H-D exchange
  • Hydrogenative ring opening
  • Mechanism of ring opening
  • Pd/SiO
  • Rh/SiO

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Transformations of cyclohexene oxide over silica-supported Cu, Pd, and Rh catalysts in H2/D2 atmosphere. / Fási, András; Pálinkó, I.

In: Journal of Catalysis, Vol. 181, No. 1, 1999, p. 28-36.

Research output: Contribution to journalArticle

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