Selective oxidation of alcohols over Ag-containing Si3N4 catalysts

被引：20

作者：

Vodyankina, Olga V. ^{[1
]}

Blokhina, A. S. ^{[1
]}

Kurzina, I. A. ^{[1
,2
]}

Sobolev, V. I. ^{[3
]}

Koltunov, K. Yu. ^{[3
,4
]}

Chukhlomina, L. N. ^{[5
]}

Dvilis, E. S. ^{[2
]}

机构：

[1] Tomsk State Univ, Tomsk 634050, Russia

[2] Tomsk Polytech Univ, Tomsk 634050, Russia

[3] GK Boreskov Inst Catalysis SB RAS, Novosibirsk 630090, Russia

[4] Novosibirsk State Univ, Novosibirsk 630090, Russia

[5] Dept Struct Macrokinet SB RAS, Tomsk 634021, Russia

来源：

CATALYSIS TODAY | 2013年 / 203卷

关键词：

Selective oxidation; Ethanol; Ethylene glycol; Si3N4 ceramic support; Self-propagating high-temperature synthesis; Ag-containing catalyst; SILICON-NITRIDE; SILVER; NANOPARTICLES; COMBUSTION; ETHANOL; METHANE; SUPPORT; METAL;

D O I：

10.1016/j.cattod.2012.02.056

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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 degrees C), while the support phase composition did not influence the catalytic performance. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：127 / 132

页数：6

共 26 条

[1] Features of the formation of silver nanoparticles on the silicon nitride surface [J].