Partial Oxidation of Methane on Silica-Supported Vanadia Catalysts. The Relevance of Catalyst BET Area and Gas-Phase Activation

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Title:Partial Oxidation of Methane on Silica-Supported Vanadia Catalysts. The Relevance of Catalyst BET Area and Gas-Phase Activation
Creators:
Cardoso, José Hilton
Bañares, Miguel A.
Bueno, Jose M. Correa
Fierro, Jose L. G.
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 63, 11, pp. 1743-1754
Uncontrolled Keywords:Oxygenates, Coupling, Vanadia, Methane, Heterogeneous catalysis, BET area, Gas-phase reaction

Abstract

Silica-supported vanadium oxide catalysts with different BET areas have been used in partial oxidation of methane to formaldehyde. The BET area of the silica support not only plays an important role in the activation of methane but also in promoting the degradation of reaction intermediates. A reaction scheme is proposed where HCHO and CO<sub>2</sub> are primary products, whereas CO is a secondary product from the degradation of formaldehyde and hydrocarbons. A large BET area led to degradation of hydrocarbons to CO, whereas on low-BET-area catalysts, this side reaction is partially inhibited with the simultaneous formation of C<sub>2</sub> hydrocarbons. The general trend observed is that the activity decreases with decreasing BET areas. Gas-phase reactivity increases the initial activation of methane, but does not increase the degradation of reaction intermediates as much as surface area does thus providing a selective activation for methane.

Title:Partial Oxidation of Methane on Silica-Supported Vanadia Catalysts. The Relevance of Catalyst BET Area and Gas-Phase Activation
Creators:
Cardoso, José Hilton
Bañares, Miguel A.
Bueno, Jose M. Correa
Fierro, Jose L. G.
Uncontrolled Keywords:Oxygenates, Coupling, Vanadia, Methane, Heterogeneous catalysis, BET area, Gas-phase reaction
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:63
Number:11
Page Range:pp. 1743-1754
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19981743UNSPECIFIED
ID Code:1417
Item Type:Article
Deposited On:06 Feb 2009 17:09
Last Modified:06 Feb 2009 16:09

Citation

Cardoso, José Hilton; Bañares, Miguel A.; Bueno, Jose M. Correa; Fierro, Jose L. G. (1998) Partial Oxidation of Methane on Silica-Supported Vanadia Catalysts. The Relevance of Catalyst BET Area and Gas-Phase Activation. Collection of Czechoslovak Chemical Communications, 63 (11). pp. 1743-1754. ISSN 0010-0765

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