Hydroconversion of acetic acid over carbon aerogel supported molybdenum catalyst

Dániel Ábrahám, Balázs Nagy, Gábor Dobos, J. Madarász, G. Onyestyák, Mikhail V. Trenikhin, K. László

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

High surface area carbon aerogels with increasing molybdenum content were obtained by carbonization of resorcinol-formaldehyde polymer aerogels after incipient wetness impregnation (IWI). The Mo(VI) form of the impregnant was converted into different molybdenum species during the heat treatment, resulting in samples with substantially different surface and bulk compositions. The samples were tested in the hydroconversion reaction of acetic acid, a model biomass. The reaction pathways and the product distribution were governed by the accessibility of the carbon surface as well as by the amount and form of Mo. The highest selectivity for ethanol was 16%, when 85% of the acetic acid was converted. Post-catalyst analysis of the aerogels revealed that their morphology and chemistry changed substantially during the redox processes. The products of each of the three potential pathways (hydrogenolysis, ketonization and consecutive reduction) oxidized the surface even in the reductive hydrogen flow.

Original languageEnglish
Pages (from-to)46-53
Number of pages8
JournalMicroporous and Mesoporous Materials
Volume190
DOIs
Publication statusPublished - May 15 2014

Fingerprint

Molybdenum
Aerogels
aerogels
acetic acid
Acetic acid
Acetic Acid
molybdenum
Carbon
catalysts
Catalysts
carbon
hydrogenolysis
Hydrogenolysis
carbonization
Carbonization
products
biomass
formaldehyde
Formaldehyde
Impregnation

Keywords

  • Biomass conversion
  • Catalysis
  • Molybdenum
  • Porous carbon support
  • XPS

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Hydroconversion of acetic acid over carbon aerogel supported molybdenum catalyst. / Ábrahám, Dániel; Nagy, Balázs; Dobos, Gábor; Madarász, J.; Onyestyák, G.; Trenikhin, Mikhail V.; László, K.

In: Microporous and Mesoporous Materials, Vol. 190, 15.05.2014, p. 46-53.

Research output: Contribution to journalArticle

Ábrahám, Dániel ; Nagy, Balázs ; Dobos, Gábor ; Madarász, J. ; Onyestyák, G. ; Trenikhin, Mikhail V. ; László, K. / Hydroconversion of acetic acid over carbon aerogel supported molybdenum catalyst. In: Microporous and Mesoporous Materials. 2014 ; Vol. 190. pp. 46-53.
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AU - Ábrahám, Dániel

AU - Nagy, Balázs

AU - Dobos, Gábor

AU - Madarász, J.

AU - Onyestyák, G.

AU - Trenikhin, Mikhail V.

AU - László, K.

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AB - High surface area carbon aerogels with increasing molybdenum content were obtained by carbonization of resorcinol-formaldehyde polymer aerogels after incipient wetness impregnation (IWI). The Mo(VI) form of the impregnant was converted into different molybdenum species during the heat treatment, resulting in samples with substantially different surface and bulk compositions. The samples were tested in the hydroconversion reaction of acetic acid, a model biomass. The reaction pathways and the product distribution were governed by the accessibility of the carbon surface as well as by the amount and form of Mo. The highest selectivity for ethanol was 16%, when 85% of the acetic acid was converted. Post-catalyst analysis of the aerogels revealed that their morphology and chemistry changed substantially during the redox processes. The products of each of the three potential pathways (hydrogenolysis, ketonization and consecutive reduction) oxidized the surface even in the reductive hydrogen flow.

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KW - Porous carbon support

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