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

doi:10.1627/jpi.45.271

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

University of Tsukuba

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	271-278
Number of pages	8
Journal	Journal of the Japan Petroleum Institute
Volume	45
Issue number	5
DOIs	https://doi.org/10.1627/jpi.45.271
Publication status	Published - 2002

Keywords

Carbon deposition
Carbon monoxide
Hydrogenation
Regeneration
Rhodium mixed oxide

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title = "Hydrogenation of CO over RhVO4/SiO2 Catalyst -Detection and Elimination of Deposited Carbon and Regeneration of RhVO4-",

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.",

keywords = "Carbon deposition, Carbon monoxide, Hydrogenation, Regeneration, Rhodium mixed oxide",

author = "Ito, {Shin Ichi} and Chikashi Chibana and Ken Nagashima and Satoshi Kameoka and Keiichi Tomishige and Kimio Kunimori",

year = "2002",

doi = "10.1627/jpi.45.271",

language = "English",

volume = "45",

pages = "271--278",

journal = "Journal of the Japan Petroleum Institute",

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publisher = "Japan Petroleum Institute",

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T1 - Hydrogenation of CO over RhVO4/SiO2 Catalyst -Detection and Elimination of Deposited Carbon and Regeneration of RhVO4-

AU - Ito, Shin Ichi

AU - Chibana, Chikashi

AU - Nagashima, Ken

AU - Kameoka, Satoshi

AU - Tomishige, Keiichi

AU - Kunimori, Kimio

PY - 2002

Y1 - 2002

N2 - 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.

AB - 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.

KW - Carbon deposition

KW - Carbon monoxide

KW - Hydrogenation

KW - Regeneration

KW - Rhodium mixed oxide

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

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