fulltext.study @t Gmail

Studies on vanadium-doped iron phosphate catalysts for the ammoxidation of methylpyrazine

Paper ID Volume ID Publish Year Pages File Format Full-Text
43304 45963 2008 9 PDF Available
Title
Studies on vanadium-doped iron phosphate catalysts for the ammoxidation of methylpyrazine
Abstract

Vanadium-doped iron phosphates (with 1, 3 and 5 wt.% V) were prepared and characterized by XRD, FTIR, UV-DRS, TPR, TEM, Laser Raman, XPS, and potentiometric titration techniques. Both undoped and V-doped catalysts displayed predominant formation of quartz type iron phosphate. In addition, the V-doped catalysts indicated formation of two more phases: V2O5 and (VO)2P2O7. The nitrile yield of V-doped catalysts in the ammoxidation of methyl pyrazine to cyanopyrazine were found to be higher than the yield of bulk FePO4, V2O5 and (VO)2P2O7. The increase in the redox property of the catalyst, as obtained by benzyl alcohol oxidation to benzaldehyde, was found to be the reason for enhanced activity. The variation of V-content in FePO4 revealed that the catalyst reached its optimum activity at 3 wt.% V. However, the acid strength of the V-doped catalysts decreased with V-content and this reflected in their cyanopyrazine selectivity.

Graphical abstractBulk and vanadium-doped iron phosphate catalysts were prepared and studied for the vapor phase ammoxidation of 2-methyl pyrazine. The vanadium-doped catalyst showed better activity than bulk catalysts as the vanadium doping leads to formation of quartz-type iron phosphate with additional phases of V2O5 and (VO)2P2O7.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Iron phosphate; Vanadium doping; Ammoxidation; Methylpyrazine
First Page Preview
Studies on vanadium-doped iron phosphate catalysts for the ammoxidation of methylpyrazine
Get Full-Text Now
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 339, Issue 2, 1 May 2008, Pages 99–107
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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