Selective oxidation of alcohols over Ag-containing Si3N 4 catalysts

Abstract

Ag-containing ceramic catalysts modified or unmodified with Zr and Al were studied in selective catalytic oxidation of ethylene glycol and ethanol into the corresponding carbonyl compounds. The influence of phase and chemical composition of ceramic supports prepared by the self-propagating high-temperature synthesis (SHS) on the basis of silicon nitride was considered. The catalysts were characterized by X-ray diffraction, using scanning electron microscope (SEM) equipped with energy dispersive X-ray analysis (EDX) unit, and tested in selective oxidation of ethanol and ethylene glycol into acetaldehyde and glyoxal, respectively. It was shown that the presence of ZrO₂ and Si₃Al₁₂O₉N₁₀ phases in the support composition allowed increasing glyoxal selectivity up to 50% at 87% conversion of glycol. Ag-containing ceramic catalysts also demonstrated high selectivity/activity in ethanol oxidation (95% acetaldehyde selectivity and 100% ethanol conversion at 300 °C), while the support phase composition did not influence the catalytic performance.

Original language	English
Pages (from-to)	127-132
Number of pages	6
Journal	Catalysis Today
Volume	203
DOIs	https://doi.org/10.1016/j.cattod.2012.02.056
Publication status	Published - 30 Mar 2013

Keywords

Ag-containing catalyst
Ethanol
Ethylene glycol
Selective oxidation
Self-propagating high-temperature synthesis
SiN ceramic support

ASJC Scopus subject areas

Catalysis
Chemistry(all)

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10.1016/j.cattod.2012.02.056

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title = "Selective oxidation of alcohols over Ag-containing Si3N 4 catalysts",

abstract = "Ag-containing ceramic catalysts modified or unmodified with Zr and Al were studied in selective catalytic oxidation of ethylene glycol and ethanol into the corresponding carbonyl compounds. The influence of phase and chemical composition of ceramic supports prepared by the self-propagating high-temperature synthesis (SHS) on the basis of silicon nitride was considered. The catalysts were characterized by X-ray diffraction, using scanning electron microscope (SEM) equipped with energy dispersive X-ray analysis (EDX) unit, and tested in selective oxidation of ethanol and ethylene glycol into acetaldehyde and glyoxal, respectively. It was shown that the presence of ZrO2 and Si3Al12O9N10 phases in the support composition allowed increasing glyoxal selectivity up to 50% at 87% conversion of glycol. Ag-containing ceramic catalysts also demonstrated high selectivity/activity in ethanol oxidation (95% acetaldehyde selectivity and 100% ethanol conversion at 300 °C), while the support phase composition did not influence the catalytic performance.",

keywords = "Ag-containing catalyst, Ethanol, Ethylene glycol, Selective oxidation, Self-propagating high-temperature synthesis, SiN ceramic support",

author = "Vodyankina, {Olga V.} and Blokhina, {A. S.} and Kurzina, {I. A.} and Sobolev, {V. I.} and Koltunov, {K. Yu} and Chukhlomina, {L. N.} and Dvilis, {E. S.}",

year = "2013",

month = mar,

day = "30",

doi = "10.1016/j.cattod.2012.02.056",

language = "English",

volume = "203",

pages = "127--132",

journal = "Catalysis Today",

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AU - Vodyankina, Olga V.

AU - Blokhina, A. S.

AU - Kurzina, I. A.

AU - Sobolev, V. I.

AU - Koltunov, K. Yu

AU - Chukhlomina, L. N.

AU - Dvilis, E. S.

PY - 2013/3/30

Y1 - 2013/3/30

N2 - Ag-containing ceramic catalysts modified or unmodified with Zr and Al were studied in selective catalytic oxidation of ethylene glycol and ethanol into the corresponding carbonyl compounds. The influence of phase and chemical composition of ceramic supports prepared by the self-propagating high-temperature synthesis (SHS) on the basis of silicon nitride was considered. The catalysts were characterized by X-ray diffraction, using scanning electron microscope (SEM) equipped with energy dispersive X-ray analysis (EDX) unit, and tested in selective oxidation of ethanol and ethylene glycol into acetaldehyde and glyoxal, respectively. It was shown that the presence of ZrO2 and Si3Al12O9N10 phases in the support composition allowed increasing glyoxal selectivity up to 50% at 87% conversion of glycol. Ag-containing ceramic catalysts also demonstrated high selectivity/activity in ethanol oxidation (95% acetaldehyde selectivity and 100% ethanol conversion at 300 °C), while the support phase composition did not influence the catalytic performance.

AB - Ag-containing ceramic catalysts modified or unmodified with Zr and Al were studied in selective catalytic oxidation of ethylene glycol and ethanol into the corresponding carbonyl compounds. The influence of phase and chemical composition of ceramic supports prepared by the self-propagating high-temperature synthesis (SHS) on the basis of silicon nitride was considered. The catalysts were characterized by X-ray diffraction, using scanning electron microscope (SEM) equipped with energy dispersive X-ray analysis (EDX) unit, and tested in selective oxidation of ethanol and ethylene glycol into acetaldehyde and glyoxal, respectively. It was shown that the presence of ZrO2 and Si3Al12O9N10 phases in the support composition allowed increasing glyoxal selectivity up to 50% at 87% conversion of glycol. Ag-containing ceramic catalysts also demonstrated high selectivity/activity in ethanol oxidation (95% acetaldehyde selectivity and 100% ethanol conversion at 300 °C), while the support phase composition did not influence the catalytic performance.

KW - Ag-containing catalyst

KW - Ethanol

KW - Ethylene glycol

KW - Selective oxidation

KW - Self-propagating high-temperature synthesis

KW - SiN ceramic support

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Selective oxidation of alcohols over Ag-containing Si₃N ₄ catalysts

Abstract

Keywords

ASJC Scopus subject areas

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