Novel Cu and Cu2In/aluminosilicate type catalysts for the reduction of biomass-derived volatile fatty acids to alcohols

• Authors: Szabolcs Harnos , György Onyestyák , Róbert Barthos , Magdalena Štolcová , Alexander Kaszonyi , József Valyon
• Languages of publication: EN

Abstracts

EN

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 H2-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 In2O3 additive. In the catalysts modified by In2O3 additive formation of copper-indium alloy phase (Cu2In intermetallic compound) was detected resulting in a different selectivity than the one recorded for the Cu/SiAl. [...]

Keywords

EN

Acetic acid reduction; Cu-zeolites; In2O3 doping; Ethanol; Ethyl acetate

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2012
• Volume: 10
• Issue: 6
• Pages: 1954-1962

Dates

published

1 - 12 - 2012

online

21 - 9 - 2012

Contributors

author

Szabolcs Harnos

• Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Science, Budapest, H-1025, Hungary

author

György Onyestyák

• Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Science, Budapest, H-1025, Hungary

author

Róbert Barthos

• Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Science, Budapest, H-1025, Hungary

author

Magdalena Štolcová

• Department of Organic Technology, Slovak University of Technology, Bratislava, SK-81237, Slovak Republic

author

Alexander Kaszonyi

• Department of Organic Technology, Slovak University of Technology, Bratislava, SK-81237, Slovak Republic

author

József Valyon

• Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Science, Budapest, H-1025, Hungary

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Identifiers

DOI

10.2478/s11532-012-0121-3