Re-Co bimetallic catalysts prepared by sol/gel technique: Characterization and catalytic properties

L. Guczi, G. Stefler, L. Borkó, Z. Koppány, F. Mizukami, M. Toba, S. Niwa

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

CO hydrogenation over Re-Co bimetallic samples prepared by sol/gel technique have been investigated. Reduction of the Co2+ ions in the sol/gel samples prepared by means of ethyleneglycol (SG1) and hexyleneglycol (SG5) as gelation agent could be facilitated indicated by temperature programmed reduction (TPR), X-ray diffraction (XRD) and transmission electron microscope (TEM). The metal particle size is 2 and 20nm, respectively. In the CO hydrogenation over the samples the C2-C4 fraction are formed predominantly due to high hydrogenation/chain propagation ratio. Comparing this result with that obtained over Co-Re/Al2O3 (IM) and Re-Co/NaY (IM) samples prepared by incipient wetness technique, on which the hydrogenation/chain propagation ratio is low, a large C5+ formation was observed. The nature of the active sites is discussed in terms of particle size and enhanced hydrogenation activity of rhenium.

Original languageEnglish
Pages (from-to)79-86
Number of pages8
JournalApplied Catalysis A: General
Volume246
Issue number1
DOIs
Publication statusPublished - Jun 25 2003

Fingerprint

Hydrogenation
Sol-gels
Catalysts
Carbon Monoxide
Particle size
Rhenium
Gelation
Electron microscopes
Metals
Ions
X ray diffraction
Temperature

Keywords

  • CO hydrogenation
  • Cobalt and rhenium-cobalt samples
  • Sol/gel technique

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Re-Co bimetallic catalysts prepared by sol/gel technique : Characterization and catalytic properties. / Guczi, L.; Stefler, G.; Borkó, L.; Koppány, Z.; Mizukami, F.; Toba, M.; Niwa, S.

In: Applied Catalysis A: General, Vol. 246, No. 1, 25.06.2003, p. 79-86.

Research output: Contribution to journalArticle

@article{62b027d1772d4ad8850ace0aa2eeddcb,
title = "Re-Co bimetallic catalysts prepared by sol/gel technique: Characterization and catalytic properties",
abstract = "CO hydrogenation over Re-Co bimetallic samples prepared by sol/gel technique have been investigated. Reduction of the Co2+ ions in the sol/gel samples prepared by means of ethyleneglycol (SG1) and hexyleneglycol (SG5) as gelation agent could be facilitated indicated by temperature programmed reduction (TPR), X-ray diffraction (XRD) and transmission electron microscope (TEM). The metal particle size is 2 and 20nm, respectively. In the CO hydrogenation over the samples the C2-C4 fraction are formed predominantly due to high hydrogenation/chain propagation ratio. Comparing this result with that obtained over Co-Re/Al2O3 (IM) and Re-Co/NaY (IM) samples prepared by incipient wetness technique, on which the hydrogenation/chain propagation ratio is low, a large C5+ formation was observed. The nature of the active sites is discussed in terms of particle size and enhanced hydrogenation activity of rhenium.",
keywords = "CO hydrogenation, Cobalt and rhenium-cobalt samples, Sol/gel technique",
author = "L. Guczi and G. Stefler and L. Bork{\'o} and Z. Kopp{\'a}ny and F. Mizukami and M. Toba and S. Niwa",
year = "2003",
month = "6",
day = "25",
doi = "10.1016/S0926-860X(02)00662-2",
language = "English",
volume = "246",
pages = "79--86",
journal = "Applied Catalysis A: General",
issn = "0926-860X",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Re-Co bimetallic catalysts prepared by sol/gel technique

T2 - Characterization and catalytic properties

AU - Guczi, L.

AU - Stefler, G.

AU - Borkó, L.

AU - Koppány, Z.

AU - Mizukami, F.

AU - Toba, M.

AU - Niwa, S.

PY - 2003/6/25

Y1 - 2003/6/25

N2 - CO hydrogenation over Re-Co bimetallic samples prepared by sol/gel technique have been investigated. Reduction of the Co2+ ions in the sol/gel samples prepared by means of ethyleneglycol (SG1) and hexyleneglycol (SG5) as gelation agent could be facilitated indicated by temperature programmed reduction (TPR), X-ray diffraction (XRD) and transmission electron microscope (TEM). The metal particle size is 2 and 20nm, respectively. In the CO hydrogenation over the samples the C2-C4 fraction are formed predominantly due to high hydrogenation/chain propagation ratio. Comparing this result with that obtained over Co-Re/Al2O3 (IM) and Re-Co/NaY (IM) samples prepared by incipient wetness technique, on which the hydrogenation/chain propagation ratio is low, a large C5+ formation was observed. The nature of the active sites is discussed in terms of particle size and enhanced hydrogenation activity of rhenium.

AB - CO hydrogenation over Re-Co bimetallic samples prepared by sol/gel technique have been investigated. Reduction of the Co2+ ions in the sol/gel samples prepared by means of ethyleneglycol (SG1) and hexyleneglycol (SG5) as gelation agent could be facilitated indicated by temperature programmed reduction (TPR), X-ray diffraction (XRD) and transmission electron microscope (TEM). The metal particle size is 2 and 20nm, respectively. In the CO hydrogenation over the samples the C2-C4 fraction are formed predominantly due to high hydrogenation/chain propagation ratio. Comparing this result with that obtained over Co-Re/Al2O3 (IM) and Re-Co/NaY (IM) samples prepared by incipient wetness technique, on which the hydrogenation/chain propagation ratio is low, a large C5+ formation was observed. The nature of the active sites is discussed in terms of particle size and enhanced hydrogenation activity of rhenium.

KW - CO hydrogenation

KW - Cobalt and rhenium-cobalt samples

KW - Sol/gel technique

UR - http://www.scopus.com/inward/record.url?scp=0038046112&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038046112&partnerID=8YFLogxK

U2 - 10.1016/S0926-860X(02)00662-2

DO - 10.1016/S0926-860X(02)00662-2

M3 - Article

AN - SCOPUS:0038046112

VL - 246

SP - 79

EP - 86

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

SN - 0926-860X

IS - 1

ER -