Stability of the so-called "Co-Mo-S" phase in a carbon-supported Co-Mo sulfide catalyst at very low Co/Mo ratio

M.W.J. Crajé, E. Gerkema, V.H.J. Beer, de, A.M. Kraan, van der

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)
55 Downloads (Pure)

Abstract

Several aspects of the stability of the so-called "Co-Mo-S" phase in a fully sulfided Co(0.04)Mo(6.84)/C (wt%) catalyst have been examined by Mössbauer emission spectroscopy. The "Co-Mo-S" parameters turned out to be unchanged when the catalyst is exposed for 23 days to ambient air at room temperature. However, if this exposure to air is extended for over 100 days, the so-called "Co-Mo-S" phase was found to be oxidized to a high-spin Fe2+ phase which has no strong interaction with the "MoS2" particles. After resulfidation of the catalyst the so-called "Co-Mo-S" phase is formed again.
Original languageEnglish
Pages (from-to)1795-1799
Number of pages5
JournalHyperfine Interactions
Volume57
Issue number1-4
DOIs
Publication statusPublished - 1990

Fingerprint

Sulfides
sulfides
Carbon
catalysts
Catalysts
carbon
air
Emission spectroscopy
Scattering parameters
Air
room temperature
spectroscopy
Temperature

Cite this

Crajé, M.W.J. ; Gerkema, E. ; Beer, de, V.H.J. ; Kraan, van der, A.M. / Stability of the so-called "Co-Mo-S" phase in a carbon-supported Co-Mo sulfide catalyst at very low Co/Mo ratio. In: Hyperfine Interactions. 1990 ; Vol. 57, No. 1-4. pp. 1795-1799.
@article{655737d5618845be8182697283a8cb70,
title = "Stability of the so-called {"}Co-Mo-S{"} phase in a carbon-supported Co-Mo sulfide catalyst at very low Co/Mo ratio",
abstract = "Several aspects of the stability of the so-called {"}Co-Mo-S{"} phase in a fully sulfided Co(0.04)Mo(6.84)/C (wt{\%}) catalyst have been examined by M{\"o}ssbauer emission spectroscopy. The {"}Co-Mo-S{"} parameters turned out to be unchanged when the catalyst is exposed for 23 days to ambient air at room temperature. However, if this exposure to air is extended for over 100 days, the so-called {"}Co-Mo-S{"} phase was found to be oxidized to a high-spin Fe2+ phase which has no strong interaction with the {"}MoS2{"} particles. After resulfidation of the catalyst the so-called {"}Co-Mo-S{"} phase is formed again.",
author = "M.W.J. Craj{\'e} and E. Gerkema and {Beer, de}, V.H.J. and {Kraan, van der}, A.M.",
year = "1990",
doi = "10.1007/BF02405724",
language = "English",
volume = "57",
pages = "1795--1799",
journal = "Hyperfine Interactions",
issn = "0304-3843",
publisher = "Springer",
number = "1-4",

}

Stability of the so-called "Co-Mo-S" phase in a carbon-supported Co-Mo sulfide catalyst at very low Co/Mo ratio. / Crajé, M.W.J.; Gerkema, E.; Beer, de, V.H.J.; Kraan, van der, A.M.

In: Hyperfine Interactions, Vol. 57, No. 1-4, 1990, p. 1795-1799.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Stability of the so-called "Co-Mo-S" phase in a carbon-supported Co-Mo sulfide catalyst at very low Co/Mo ratio

AU - Crajé, M.W.J.

AU - Gerkema, E.

AU - Beer, de, V.H.J.

AU - Kraan, van der, A.M.

PY - 1990

Y1 - 1990

N2 - Several aspects of the stability of the so-called "Co-Mo-S" phase in a fully sulfided Co(0.04)Mo(6.84)/C (wt%) catalyst have been examined by Mössbauer emission spectroscopy. The "Co-Mo-S" parameters turned out to be unchanged when the catalyst is exposed for 23 days to ambient air at room temperature. However, if this exposure to air is extended for over 100 days, the so-called "Co-Mo-S" phase was found to be oxidized to a high-spin Fe2+ phase which has no strong interaction with the "MoS2" particles. After resulfidation of the catalyst the so-called "Co-Mo-S" phase is formed again.

AB - Several aspects of the stability of the so-called "Co-Mo-S" phase in a fully sulfided Co(0.04)Mo(6.84)/C (wt%) catalyst have been examined by Mössbauer emission spectroscopy. The "Co-Mo-S" parameters turned out to be unchanged when the catalyst is exposed for 23 days to ambient air at room temperature. However, if this exposure to air is extended for over 100 days, the so-called "Co-Mo-S" phase was found to be oxidized to a high-spin Fe2+ phase which has no strong interaction with the "MoS2" particles. After resulfidation of the catalyst the so-called "Co-Mo-S" phase is formed again.

U2 - 10.1007/BF02405724

DO - 10.1007/BF02405724

M3 - Article

VL - 57

SP - 1795

EP - 1799

JO - Hyperfine Interactions

JF - Hyperfine Interactions

SN - 0304-3843

IS - 1-4

ER -