Catalytic performance and characterization of RhVO4/SiO 2 for hydroformylation and CO hydrogenation

Takashi Yamagishi, Ippei Furikado, Shin Ichi Ito, Toshihiro Miyao, Shuichi Naito, Keiichi Tomishige, Kimio Kunimori

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Effect of addition of vanadium oxide (vanadia) to Rh/SiO2 in hydroformylation of ethylene and CO hydrogenation was investigated. In the hydroformylation of ethylene, the addition of vanadia enhanced hydroformylation activity and selectivity; especially the selectivity for 1-propanol formation was drastically promoted. The promoting effect was observed more significantly on the catalyst calcined at higher temperature such as 973 K. It is found that the effect is related to the formation of the RhVO4 phase, and it is suggested that the active site consists of Rh metal and partially reduced VOx, which is formed by the reduction of RhVO4. This can make the interaction between Rh and VOx more intimate. This catalyst was also effective for the alcohol formation in CO hydrogenation. Based on the catalyst characterization by means of the adsorption measurements of H 2 and CO, H2-D2 exchange rate under the presence of CO, temperature-programmed desorption (TPD) of CO, temperature-programmed reduction (TPR) with H2 and temperature-programmed surface reaction (TPSR) of adsorbed CO with H 2, it is suggested that the sites for H2 activation, which cannot be inhibited by the presence of CO, play an important role in the promotion of alcohol formation in hydroformylation and CO hydrogenation.

Original languageEnglish
Pages (from-to)201-212
Number of pages12
JournalJournal of Molecular Catalysis A: Chemical
Volume244
Issue number1-2
DOIs
Publication statusPublished - 2006 Feb 1
Externally publishedYes

Keywords

  • 1-Propanol
  • Ethylene
  • Hydroformylation
  • Rh-VO interaction
  • RhVO
  • SMOI

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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