The role of cerium in the oxidation of ethanol over SnO2-supported molybdenum oxides

被引：17

作者：

Gonçalves, FM ^{[1
]}

Medeiros, PRS ^{[1
]}

Appel, LG ^{[1
]}

机构：

[1] MCT, Inst Nacl Tecnol, BR-20081310 Rio De Janeiro, Brazil

来源：

APPLIED CATALYSIS A-GENERAL | 2001年 / 208卷 / 1-2期

关键词：

cerium; ethanol; tin; molybdenum; oxidation;

D O I：

10.1016/S0926-860X(00)00716-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The role of Ce in the system Ce-Mo-Sn-O was studied by means of catalytic oxidation of ethanol. The catalysts were obtained from precipitation of SnCl4 by addition of ammonia in the presence of (NH4)(2)Mo7O24 and Ce(NO3)(3). Mo concentration was fixed at 8 wt.%, and Ce at 0, 1, 2.7 wt.%. These catalysts were characterized by XRD, DRS-UV, TPR, CO2 adsorption and Mo superficial measurement. It was verified that the presence of Ce changes not only the texture and the Mo species, but also the basic properties of the Sn-Mo system. The results have also shown that cerium increases both activity and selectivity to acetic acid and acetaldehyde. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：265 / 270

页数：6

共 16 条

[1]

ALLAKHVERDOVA NK, 1992, KINET KATAL, V33, P327

[2]

ALLAKHVERDOVA NK, 1992, KINET KATAL, V33, P586

[3] The CO2-CeO2 interaction and its role in the CeO2 reactivity [J].

Appel, LG ;

Eon, JG ;

Schmal, M .

CATALYSIS LETTERS, 1998, 56 (04) :199-202

[4]

APPEL LG, 1989, Patent No. 8901776

[5] FROM BULK CEO2 TO SUPPORTED CERIUM OXYGEN CLUSTERS - A DIFFUSE REFLECTANCE APPROACH [J].

BENSALEM, A ;

MULLER, JC ;

BOZONVERDURAZ, F .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1992, 88 (01) :153-154

[6] STRUCTURE AND DISPERSION OF MOLYBDENUM OXIDE SUPPORTED ON ALUMINA AND TITANIA [J].

DESIKAN, AN ;

HUANG, L ;

OYAMA, ST .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1992, 88 (22) :3357-3365

[7] Active sites for ethanol oxidation over SnO2-supported molybdenum oxides [J].

Gonçalves, F ;

Medeiros, PRS ;

Eon, JG ;

Appel, LG .

APPLIED CATALYSIS A-GENERAL, 2000, 193 (1-2) :195-202

[8]

HANGCHUN H, 1995, J PHYS CHEM, V99, P10911

[9] SURFACE PROPERTIES AND CATALYTIC ACTIVITY OF A MO-FIXED CATALYST - STRUCTURE OF THE ACTIVE-SITE AND MECHANISM FOR SELECTIVE OXIDATION OF ETHYL-ALCOHOL [J].

IWASAWA, Y ;

NAKANO, Y ;

OGASAWARA, S .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1978, 74 :2968-2981

[10] Role of the solid acidity on the MoO3 loaded on SnO2 in the methanol oxidation into formaldehyde [J].

Niwa, M ;

Igarashi, J .

CATALYSIS TODAY, 1999, 52 (01) :71-81

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