Site-selective ethanol conversion over supported copper catalysts

被引：105

作者：

Sato, Andre G. ^{[1
]}

Volanti, Diogo P. ^{[2
]}

de Freitas, Isabel C. ^{[1
]}

Longo, Elson ^{[2
]}

Bueno, Jose Maria C. ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Engn Quim, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Estadual Paulista, Dept Fisicoquim, Inst Quim, BR-14800900 Araraquara, SP, Brazil

来源：

CATALYSIS COMMUNICATIONS | 2012年 / 26卷

关键词：

DRIFTS; XANES; Zirconia polymorphs; Hydrogen; Copper catalysts; Ethanol chemistry; ETHYL-ACETATE; MIXED OXIDES; ADSORPTION; OXIDATION; SURFACE; DEHYDROGENATION; ACID; CO; COADSORPTION; STABILITY;

D O I：

10.1016/j.catcom.2012.05.008

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 origin and influence of active sites on supported copper catalysts, and their catalytic properties for ethanol conversion, were investigated using Cu/SiO2, Cu2O/SiO2, and Cu/ZrO2. Diffuse reflectance infrared Fourier transform spectroscopy of adsorbed CO revealed that Cu1+ was more prevalent than Cu-0 species at the Cu/SiO2 surface, and that Cu-0 was the main species on Cu/ZrO2. The Cu1+/Cu-0 pair provided by Cu/SiO2 generates sites that are highly selective for the dehydrogenation of ethanol. Ethyl acetate can be formed from ethanol and acetaldehyde at ZrO2 or Cu surfaces. A combination of the Cu1+/Cu-0 pair and Cu-0 interfaced to ZrO2 is needed to efficiently transform ethanol to ethyl acetate. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：122 / 126

页数：5

共 30 条

[1] Interaction of carbon dioxide with the surface of zirconia polymorphs [J].

Bachiller-Baeza, B ;

Rodriguez-Ramos, I ;

Guerrero-Ruiz, A .

LANGMUIR, 1998, 14 (13) :3556-3564

[2] INTERMEDIATE SPECIES ON ZIRCONIA SUPPORTED METHANOL AEROGEL CATALYSTS .3. ADSORPTION OF CARBON-MONOXIDE ON COPPER-CONTAINING SOLIDS [J].

BIANCHI, D ;

CHAFIK, T ;

KHALFALLAH, M ;

TEICHNER, SJ .

APPLIED CATALYSIS A-GENERAL, 1994, 112 (01) :57-73

[3] A surface study of monoclinic zirconia (m-ZrO2) [J].

Cerrato, G ;

Bordiga, S ;

Barbera, S ;

Morterra, C .

SURFACE SCIENCE, 1997, 377 (1-3) :50-55

[4] Dehydrogenation of ethanol over copper catalysts on rice husk ash prepared by incipient wetness impregnation [J].

Chang, FW ;

Kuo, WY ;

Lee, KC .

APPLIED CATALYSIS A-GENERAL, 2003, 246 (02) :253-264

[5] Dehydrogenation of Ethanol on a 2Ru/ZrO2(111) Surface: Density Functional Computations [J].

Chen, Yu-Wei ;

Ho, Jia-Jen .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (15) :6132-6139

[6] Determination of the dispersion and surface oxidation states of supported Cu catalysts [J].

Dandekar, A ;

Vannice, MA .

JOURNAL OF CATALYSIS, 1998, 178 (02) :621-639

[7] Structure and surface and catalytic properties of Mg-Al basic oxides [J].

Di Cosimo, JI ;

Diez, VK ;

Xu, M ;

Iglesia, E ;

Apesteguia, CR .

JOURNAL OF CATALYSIS, 1998, 178 (02) :499-510

[8]

Duran R.M., 2000, THESIS U FEDERAL SAO, P135

[9] Chemicals from ethanol-The ethyl acetate one-pot synthesis [J].

Gaspar, A. B. ;

Esteves, A. M. L. ;

Mendes, F. M. T. ;

Barbosa, F. G. ;

Appel, L. G. .

APPLIED CATALYSIS A-GENERAL, 2009, 363 (1-2) :109-114

[10] The one-pot ethyl acetate syntheses: The role of the support in the oxidative and the dehydrogenative routes [J].

Gaspar, Alexandre B. ;

Barbosa, Flavia G. ;

Letichevsky, Sonia ;

Appel, Lucia G. .

APPLIED CATALYSIS A-GENERAL, 2010, 380 (1-2) :113-117

← 1 2 3 →