CO hydrogenation over cobalt and iron catalysts supported over multiwall carbon nanotubes: Effect of preparation

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Abstract

CO hydrogenation was investigated over Co or Fe catalysts supported on multiwall carbon nanotubes (MWNTs). Two types of catalysts were prepared. For the simple impregnation method, metal acetate precursors were deposited onto the surface of MWNTs. These catalysts were denoted as "I-samples." The second family of catalysts was prepared by deposition of preprepared metal oxide nanoparticles onto the MWNT support. These samples were labeled "P-samples." All of the samples were characterized by TPR and TEM measurements and tested in CO hydrogenation. TPR measurements showed easy reducibility of the metal ions in the I-Co and I-Fe samples. TEM images generally pointed to a rather uniform particle size both before and after the reaction. The highest catalytic activity and high selectivity toward C2-C4 and C5+ fractions, as well as for olefin formation, were found for I-Fe. Catalytic activity was lower for P-Co and P-Fe. It can be established that these novel catalyst systems have high activity with high olefin selectivity and high fractions of larger hydrocarbons.

Original languageEnglish
Pages (from-to)24-32
Number of pages9
JournalJournal of Catalysis
Volume244
Issue number1
DOIs
Publication statusPublished - Nov 15 2006

Fingerprint

Carbon Nanotubes
Carbon Monoxide
Cobalt
Catalyst supports
Hydrogenation
hydrogenation
Carbon nanotubes
cobalt
Iron
carbon nanotubes
iron
catalysts
Catalyst activity
preparation
Catalysts
Catalyst selectivity
Alkenes
Olefins
Metals
alkenes

Keywords

  • Co and Fe on carbon nanotubes
  • CO hydrogenation
  • Electron microscopy
  • Multiwall carbon nanotubes
  • TPR

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

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title = "CO hydrogenation over cobalt and iron catalysts supported over multiwall carbon nanotubes: Effect of preparation",
abstract = "CO hydrogenation was investigated over Co or Fe catalysts supported on multiwall carbon nanotubes (MWNTs). Two types of catalysts were prepared. For the simple impregnation method, metal acetate precursors were deposited onto the surface of MWNTs. These catalysts were denoted as {"}I-samples.{"} The second family of catalysts was prepared by deposition of preprepared metal oxide nanoparticles onto the MWNT support. These samples were labeled {"}P-samples.{"} All of the samples were characterized by TPR and TEM measurements and tested in CO hydrogenation. TPR measurements showed easy reducibility of the metal ions in the I-Co and I-Fe samples. TEM images generally pointed to a rather uniform particle size both before and after the reaction. The highest catalytic activity and high selectivity toward C2-C4 and C5+ fractions, as well as for olefin formation, were found for I-Fe. Catalytic activity was lower for P-Co and P-Fe. It can be established that these novel catalyst systems have high activity with high olefin selectivity and high fractions of larger hydrocarbons.",
keywords = "Co and Fe on carbon nanotubes, CO hydrogenation, Electron microscopy, Multiwall carbon nanotubes, TPR",
author = "L. Guczi and G. Stefler and O. Geszti and Z. Kopp{\'a}ny and Z. K{\'o}nya and {\'E} Moln{\'a}r and M. Urb{\'a}n and I. Kiricsi",
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T1 - CO hydrogenation over cobalt and iron catalysts supported over multiwall carbon nanotubes

T2 - Effect of preparation

AU - Guczi, L.

AU - Stefler, G.

AU - Geszti, O.

AU - Koppány, Z.

AU - Kónya, Z.

AU - Molnár, É

AU - Urbán, M.

AU - Kiricsi, I.

PY - 2006/11/15

Y1 - 2006/11/15

N2 - CO hydrogenation was investigated over Co or Fe catalysts supported on multiwall carbon nanotubes (MWNTs). Two types of catalysts were prepared. For the simple impregnation method, metal acetate precursors were deposited onto the surface of MWNTs. These catalysts were denoted as "I-samples." The second family of catalysts was prepared by deposition of preprepared metal oxide nanoparticles onto the MWNT support. These samples were labeled "P-samples." All of the samples were characterized by TPR and TEM measurements and tested in CO hydrogenation. TPR measurements showed easy reducibility of the metal ions in the I-Co and I-Fe samples. TEM images generally pointed to a rather uniform particle size both before and after the reaction. The highest catalytic activity and high selectivity toward C2-C4 and C5+ fractions, as well as for olefin formation, were found for I-Fe. Catalytic activity was lower for P-Co and P-Fe. It can be established that these novel catalyst systems have high activity with high olefin selectivity and high fractions of larger hydrocarbons.

AB - CO hydrogenation was investigated over Co or Fe catalysts supported on multiwall carbon nanotubes (MWNTs). Two types of catalysts were prepared. For the simple impregnation method, metal acetate precursors were deposited onto the surface of MWNTs. These catalysts were denoted as "I-samples." The second family of catalysts was prepared by deposition of preprepared metal oxide nanoparticles onto the MWNT support. These samples were labeled "P-samples." All of the samples were characterized by TPR and TEM measurements and tested in CO hydrogenation. TPR measurements showed easy reducibility of the metal ions in the I-Co and I-Fe samples. TEM images generally pointed to a rather uniform particle size both before and after the reaction. The highest catalytic activity and high selectivity toward C2-C4 and C5+ fractions, as well as for olefin formation, were found for I-Fe. Catalytic activity was lower for P-Co and P-Fe. It can be established that these novel catalyst systems have high activity with high olefin selectivity and high fractions of larger hydrocarbons.

KW - Co and Fe on carbon nanotubes

KW - CO hydrogenation

KW - Electron microscopy

KW - Multiwall carbon nanotubes

KW - TPR

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