Hydrogenation of CO over RhVO4/SiO2 Catalyst -Detection and Elimination of Deposited Carbon and Regeneration of RhVO4-

Shin Ichi Ito, Chikashi Chibana, Ken Nagashima, Satoshi Kameoka, Keiichi Tomishige, Kimio Kunimori

Research output: Contribution to journalArticlepeer-review

Abstract

CO hydrogenation over RhVO4 catalyst on SiO2 support (RhVO4/SiO2) was investigated after H2 reduction at 573 K. RhVO4 catalyst was formed on the SiO2 support by calcination in air at 973 K with an atomic ratio of V/Rh = 1. RhVO4 was decomposed to Rh metal particles and highly dispersed V oxide particles by H2 reduction, and a strong metal-oxide (Rh-vanadium oxide) interaction (SMOI) was induced. The RhVO4/SiO2 catalyst after H2 reduction showed higher activity and selectivity for C2 oxygenates in CO hydrogenation, compared with unpromoted Rh/SiO2 catalyst. The activity of the RhVO4/SiO2 catalyst decreased after intentional deactivation treatment (at 513 K in a stream of the reaction gas for 10 h; CO conversion of 100%). Temperature-programmed oxidation (TPO) of the deactivated RhVO4/SiO2 catalyst resulted in formation of CO2. Therefore, the deactivation was probably due to carbon deposition. RhVO4 on the SiO2 support was regenerated by recalcination in O2 at 873 K, and the activity and selectivity for C2 oxygenates were restored.

Original languageEnglish
Pages (from-to)271-278
Number of pages8
JournalJournal of The Japan Petroleum Institute
Volume45
Issue number5
DOIs
Publication statusPublished - 2002
Externally publishedYes

Keywords

  • Carbon deposition
  • Carbon monoxide
  • Hydrogenation
  • Regeneration
  • Rhodium mixed oxide

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

Fingerprint Dive into the research topics of 'Hydrogenation of CO over RhVO<sub>4</sub>/SiO<sub>2</sub> Catalyst -Detection and Elimination of Deposited Carbon and Regeneration of RhVO<sub>4</sub>-'. Together they form a unique fingerprint.

Cite this