Novel Cu and Cu 2In/aluminosilicate type catalysts for the reduction of biomass-derived volatile fatty acids to alcohols

Szabolcs Harnos, G. Onyestyák, R. Barthos, Magdalena Štolcová, Alexander Kaszonyi, J. Valyon

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This work relates to the consecutive reduction of short chain carboxylic acids (volatile fatty acids, VFAs) to alcohols as main products. Acetic acid (AA) was used as a reactant to model the VFAs that can be produced by either thermochemical or biological biomass degradation. The amorphised zeolite supported copper catalysts (Cu/SiAl), especially the In-modified CuIn/SiAl catalysts, showed high hydroconversion activity and selectivity for alcohol, ester and aldehyde. Catalysts containing dispersed copper particles in amorphous aluminosilicate were obtained by dehydrating and H 2-reducing Cu-forms of low-silica synthetic zeolites (A, X, P). The activity of the highly destructed Cu-aluminosilicates was found to depend on the structure of the zeolite precursor. The formation of ethyl acetate could be suppressed by adding water to the AA feed and by modifying the catalyst, e.g. by In 2O 3 additive. In the catalysts modified by In 2O 3 additive formation of copper-indium alloy phase (Cu 2In intermetallic compound) was detected resulting in a different selectivity than the one recorded for the Cu/SiAl.

Original languageEnglish
Pages (from-to)1954-1962
Number of pages9
JournalCentral European Journal of Chemistry
Volume10
Issue number6
DOIs
Publication statusPublished - Dec 2012

Fingerprint

Volatile fatty acids
Volatile Fatty Acids
Aluminosilicates
Biomass
Alcohols
Zeolites
Catalysts
Acetic acid
Acetic Acid
Copper
Indium alloys
Catalyst selectivity
Copper alloys
Carboxylic Acids
Aldehydes
Carboxylic acids
Silicon Dioxide
Intermetallics
Catalyst activity
Esters

Keywords

  • Acetic acid reduction
  • Cu-zeolites
  • Ethanol
  • Ethyl acetate
  • In O doping

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

Cite this

Novel Cu and Cu 2In/aluminosilicate type catalysts for the reduction of biomass-derived volatile fatty acids to alcohols. / Harnos, Szabolcs; Onyestyák, G.; Barthos, R.; Štolcová, Magdalena; Kaszonyi, Alexander; Valyon, J.

In: Central European Journal of Chemistry, Vol. 10, No. 6, 12.2012, p. 1954-1962.

Research output: Contribution to journalArticle

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