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Preparation and characterization of P–Mo–V mixed oxide-incorporating mesoporous silica catalysts for selective oxidation of methane to formaldehyde

Paper ID Volume ID Publish Year Pages File Format Full-Text
44111 46003 2007 8 PDF Available
Title
Preparation and characterization of P–Mo–V mixed oxide-incorporating mesoporous silica catalysts for selective oxidation of methane to formaldehyde
Abstract

P–Mo–V mixed oxide-incorporating mesoporous silica catalysts with different contents were prepared by a template method with Keggin-type heteropoly acid (HPA), H5PMo10V2O40, under acidic conditions, followed by calcination at 873 K for 5 h. During the preparation, the HPA used as a precursor of the oxide acted as a co-acid of HCl that controlled the acidity of the starting mixture. The catalysts were characterized by thermal analysis, X-ray diffraction, X-ray fluorescence spectroscopy, N2 adsorption, transmission electron microscopy, and Raman spectroscopy. The results indicated that the framework of P–Mo–V incorporated mesoporous silicas was similar to that of MCM-48. The molar ratio of P:Mo:V (1:10:2) in the catalysts showed no significant change from the HPA precursor and the mixed oxides were highly dispersed below 6.68 wt% content. The catalysts showed good activity in the selective oxidation of methane to formaldehyde with oxygen.

Graphical abstractP–Mo–V mixed oxide-incorporating mesoporous silica catalysts were prepared by using heteropoly acid, H5PMo10V2O40, as a precursor of the oxides and as a co-acid to control the content of the active species and the porous property of mesoporous silica. The catalysts with highly dispersed active species showed good selectivity and yield of HCHO in methane selective oxidation reaction. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Mesoporous silica; Heteropoly acid; Co-synthesis; Methane; Formaldehyde
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Preparation and characterization of P–Mo–V mixed oxide-incorporating mesoporous silica catalysts for selective oxidation of methane to formaldehyde
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 329, 1 October 2007, Pages 148–155
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us