Non-precious Metal Catalysts for Acetic Acid Reduction

Acetic acid (AA) hydroconversion was studied over various monometallic (Fe, Co, Ni, Cu, Zn, Pt) and bimetallic (doped with In as second, guest metal) catalysts loaded on a highly mesoporous, fumed silica support. The transformations were investigated in a fixed bed, flow-through reactor in temperatu...

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Bibliographic Details
Published inPeriodica polytechnica. Chemical engineering. Vol. 61; no. 4; pp. 270 - 277
Main Author Onyestyák, György
Format Journal Article
LanguageEnglish
Published Budapest Periodica Polytechnica, Budapest University of Technology and Economics 01.01.2017
Subjects
Acetic acid
Bimetals
Catalysis
Catalysts
Chemical industry
Cobalt
Copper
Ethanol
Iron
Nickel
Platinum
Pretreatment
Silica fume
Silicon dioxide
Zinc
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Summary:Acetic acid (AA) hydroconversion was studied over various monometallic (Fe, Co, Ni, Cu, Zn, Pt) and bimetallic (doped with In as second, guest metal) catalysts loaded on a highly mesoporous, fumed silica support. The transformations were investigated in a fixed bed, flow-through reactor in temperature range of 240-380°C using hydrogen flow at 21bar total pressure. The catalyst precursors were activated in H2 flow at 21bar and 450°C as routine pre-treatment. Catalytic performances of the studied metal catalysts have nothing in common. Activities and the yields of main products contrast strikingly. Diversity of catalytic behaviour reflects the complexity of the surface reaction network. Contrary to the highly ethanol selective Co or Cu forms, over Ni catalyst mainly methane was produced. Indium doping can completely eliminate the hydrodecarbonylation activity and turn to the consecutive reduction route resulting in high ethanol yield. Metallic phases of different peculiarities can offer promising contacts for upgrading various oxygenates obtainable from biomass degradation.
ISSN:0324-5853
1587-3765
DOI:10.3311/PPch.10502