Ni/silica-based bimetallic catalysts by solid-state co-reduction of admixed metal oxides for acetic acid hydroconversion to ethanol

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Abstract

Consecutive reduction of acetic acid to ethanol was investigated looking for advantageous bimetallic catalysts for the processing of volatile fatty acids that can be produced by thermochemical or biological biomass degradation. The reactant acid was hydrotreated in a flow-through reactor at 21 bar total pressure and 200-380 °C over fumed silica loaded with Ni main metal and Cu, Zn, Cd, Ga, In, Sn modifying metals. By varying these bimetallic composites prepared by solid-state co-reduction of admixed metal oxide precursors, the characteristic hydrodecarbonylation activity of nickel can be completely eliminated and a high ethanol yield can be attained selectively with the exception of Zn and Cd. The low boiling point and high volatility of these two elements in group IIb exclude formation of stable bimetallic composition. Indium and tin doping were found to be the most efficient. The lower reduction temperature of the In2O3 was found to be the advantage of novel In doping compared to well-known Sn-admission using oxide precursors for introduction of the second metal.

Original languageEnglish
Pages (from-to)9207-9215
Number of pages9
JournalResearch on Chemical Intermediates
Volume41
Issue number12
DOIs
Publication statusPublished - Dec 1 2015

Fingerprint

Silicon Dioxide
Acetic Acid
Oxides
Ethanol
Metals
Catalysts
Doping (additives)
Indium
Tin
Volatile Fatty Acids
Boiling point
Nickel
Biomass
Degradation
Acids
Composite materials
Processing
Chemical analysis
Temperature

Keywords

  • Acetic acid reduction
  • Bimetallic catalysts
  • Indium or tin co-catalyst
  • Ni/silica

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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title = "Ni/silica-based bimetallic catalysts by solid-state co-reduction of admixed metal oxides for acetic acid hydroconversion to ethanol",
abstract = "Consecutive reduction of acetic acid to ethanol was investigated looking for advantageous bimetallic catalysts for the processing of volatile fatty acids that can be produced by thermochemical or biological biomass degradation. The reactant acid was hydrotreated in a flow-through reactor at 21 bar total pressure and 200-380 °C over fumed silica loaded with Ni main metal and Cu, Zn, Cd, Ga, In, Sn modifying metals. By varying these bimetallic composites prepared by solid-state co-reduction of admixed metal oxide precursors, the characteristic hydrodecarbonylation activity of nickel can be completely eliminated and a high ethanol yield can be attained selectively with the exception of Zn and Cd. The low boiling point and high volatility of these two elements in group IIb exclude formation of stable bimetallic composition. Indium and tin doping were found to be the most efficient. The lower reduction temperature of the In2O3 was found to be the advantage of novel In doping compared to well-known Sn-admission using oxide precursors for introduction of the second metal.",
keywords = "Acetic acid reduction, Bimetallic catalysts, Indium or tin co-catalyst, Ni/silica",
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AU - Onyestyák, G.

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N2 - Consecutive reduction of acetic acid to ethanol was investigated looking for advantageous bimetallic catalysts for the processing of volatile fatty acids that can be produced by thermochemical or biological biomass degradation. The reactant acid was hydrotreated in a flow-through reactor at 21 bar total pressure and 200-380 °C over fumed silica loaded with Ni main metal and Cu, Zn, Cd, Ga, In, Sn modifying metals. By varying these bimetallic composites prepared by solid-state co-reduction of admixed metal oxide precursors, the characteristic hydrodecarbonylation activity of nickel can be completely eliminated and a high ethanol yield can be attained selectively with the exception of Zn and Cd. The low boiling point and high volatility of these two elements in group IIb exclude formation of stable bimetallic composition. Indium and tin doping were found to be the most efficient. The lower reduction temperature of the In2O3 was found to be the advantage of novel In doping compared to well-known Sn-admission using oxide precursors for introduction of the second metal.

AB - Consecutive reduction of acetic acid to ethanol was investigated looking for advantageous bimetallic catalysts for the processing of volatile fatty acids that can be produced by thermochemical or biological biomass degradation. The reactant acid was hydrotreated in a flow-through reactor at 21 bar total pressure and 200-380 °C over fumed silica loaded with Ni main metal and Cu, Zn, Cd, Ga, In, Sn modifying metals. By varying these bimetallic composites prepared by solid-state co-reduction of admixed metal oxide precursors, the characteristic hydrodecarbonylation activity of nickel can be completely eliminated and a high ethanol yield can be attained selectively with the exception of Zn and Cd. The low boiling point and high volatility of these two elements in group IIb exclude formation of stable bimetallic composition. Indium and tin doping were found to be the most efficient. The lower reduction temperature of the In2O3 was found to be the advantage of novel In doping compared to well-known Sn-admission using oxide precursors for introduction of the second metal.

KW - Acetic acid reduction

KW - Bimetallic catalysts

KW - Indium or tin co-catalyst

KW - Ni/silica

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