Acetic Acid Formation by Selective Aerobic Oxidation of Aqueous Ethanol over Heterogeneous Ruthenium Catalysts

Yury Gorbanev; Søren Kegnæs; Christopher William Hanning; Thomas Willum Hansen; Anders Riisager

doi:10.1021/cs200554h

Acetic Acid Formation by Selective Aerobic Oxidation of Aqueous Ethanol over Heterogeneous Ruthenium Catalysts

Yury Gorbanev, Søren Kegnæs, Christopher William Hanning, Thomas Willum Hansen, Anders Riisager

Department of Chemistry

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Abstract

Heterogeneous catalyst systems comprising ruthenium hydroxide supported on different carrier materials, titania, alumina, ceria, and spinel (MgAl2O4), were applied in selective aerobic oxidation ethanol to form acetic acid, an important bulk chemical and food ingredient. The catalysts were characterized by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and nitrogen physisorption and utilized in the oxidation of 2.5–50 wt % aqueous ethanol solutions at elevated temperatures and pressures. The effects of Ru metal loading, pretreatment of catalysts, oxidant pressure, reaction temperature, and substrate concentration were investigated. Quantitative yield of acetic acid was obtained with 1.2 wt % Ru(OH)x/CeO2 under optimized conditions (150 °C, 10 bar O2, 12 h of reaction time, 0.23 mol % Ru to substrate).

Original language	English
Journal	A C S Catalysis
Volume	2
Issue number	4
Pages (from-to)	604-612
ISSN	2155-5435
DOIs	https://doi.org/10.1021/cs200554h
Publication status	Published - 2012

Keywords

Ethanol
Acetic acid
Oxidation
Heterogeneous catalysis
Ruthenium hydroxide catalysts

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10.1021/cs200554h

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title = "Acetic Acid Formation by Selective Aerobic Oxidation of Aqueous Ethanol over Heterogeneous Ruthenium Catalysts",

abstract = "Heterogeneous catalyst systems comprising ruthenium hydroxide supported on different carrier materials, titania, alumina, ceria, and spinel (MgAl2O4), were applied in selective aerobic oxidation ethanol to form acetic acid, an important bulk chemical and food ingredient. The catalysts were characterized by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and nitrogen physisorption and utilized in the oxidation of 2.5–50 wt % aqueous ethanol solutions at elevated temperatures and pressures. The effects of Ru metal loading, pretreatment of catalysts, oxidant pressure, reaction temperature, and substrate concentration were investigated. Quantitative yield of acetic acid was obtained with 1.2 wt % Ru(OH)x/CeO2 under optimized conditions (150 °C, 10 bar O2, 12 h of reaction time, 0.23 mol % Ru to substrate).",

keywords = "Ethanol, Acetic acid, Oxidation, Heterogeneous catalysis, Ruthenium hydroxide catalysts",

author = "Yury Gorbanev and S{\o}ren Kegn{\ae}s and Hanning, {Christopher William} and Hansen, {Thomas Willum} and Anders Riisager",

year = "2012",

doi = "10.1021/cs200554h",

language = "English",

volume = "2",

pages = "604--612",

journal = "A C S Catalysis",

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T1 - Acetic Acid Formation by Selective Aerobic Oxidation of Aqueous Ethanol over Heterogeneous Ruthenium Catalysts

AU - Gorbanev, Yury

AU - Kegnæs, Søren

AU - Hanning, Christopher William

AU - Hansen, Thomas Willum

AU - Riisager, Anders

PY - 2012

Y1 - 2012

N2 - Heterogeneous catalyst systems comprising ruthenium hydroxide supported on different carrier materials, titania, alumina, ceria, and spinel (MgAl2O4), were applied in selective aerobic oxidation ethanol to form acetic acid, an important bulk chemical and food ingredient. The catalysts were characterized by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and nitrogen physisorption and utilized in the oxidation of 2.5–50 wt % aqueous ethanol solutions at elevated temperatures and pressures. The effects of Ru metal loading, pretreatment of catalysts, oxidant pressure, reaction temperature, and substrate concentration were investigated. Quantitative yield of acetic acid was obtained with 1.2 wt % Ru(OH)x/CeO2 under optimized conditions (150 °C, 10 bar O2, 12 h of reaction time, 0.23 mol % Ru to substrate).

AB - Heterogeneous catalyst systems comprising ruthenium hydroxide supported on different carrier materials, titania, alumina, ceria, and spinel (MgAl2O4), were applied in selective aerobic oxidation ethanol to form acetic acid, an important bulk chemical and food ingredient. The catalysts were characterized by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and nitrogen physisorption and utilized in the oxidation of 2.5–50 wt % aqueous ethanol solutions at elevated temperatures and pressures. The effects of Ru metal loading, pretreatment of catalysts, oxidant pressure, reaction temperature, and substrate concentration were investigated. Quantitative yield of acetic acid was obtained with 1.2 wt % Ru(OH)x/CeO2 under optimized conditions (150 °C, 10 bar O2, 12 h of reaction time, 0.23 mol % Ru to substrate).

KW - Ethanol

KW - Acetic acid

KW - Oxidation

KW - Heterogeneous catalysis

KW - Ruthenium hydroxide catalysts

U2 - 10.1021/cs200554h

DO - 10.1021/cs200554h

M3 - Journal article

SN - 2155-5435

VL - 2

SP - 604

EP - 612

JO - A C S Catalysis

JF - A C S Catalysis

IS - 4

ER -

Acetic Acid Formation by Selective Aerobic Oxidation of Aqueous Ethanol over Heterogeneous Ruthenium Catalysts

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