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Catalytic properties of nitrided V/Al/O-mixed oxides in the ammoxidation of propane and new efficient preparation method for the catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
55148 47042 2012 6 PDF Available
Title
Catalytic properties of nitrided V/Al/O-mixed oxides in the ammoxidation of propane and new efficient preparation method for the catalysts
Abstract

V/Al/O oxides have been prepared and tested as catalysts for the ammoxidation of propane into acrilonitrile at 500 °C. The high efficiency of these catalysts, which were partially nitrided under catalytic reaction conditions, is confirmed. The best catalysts characterized by a V/Al ratio around 0.30, exhibited selectivity to acrilonitrile of 51% at 58% conversion. Testing at low conversion showed that propene was the main primary product from propane ammoxidation and that the reaction pathway on these catalysts was similar to that on other efficient catalytic systems. A new method of synthesis based upon the decomposition at low temperature of a mixed ammonium aluminum–vanadium oxalate was developed. It leads to highly active catalysts, which displayed increased selectivity to acrylonitrile. The gain in activity and selectivity was attributed to a better dispersion of vanadium with a higher concentration of isolated vanadium species in the bulk and presumably at the surface of the catalysts.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (83 K)Download as PowerPoint slideHighlights► The high efficiency of V/Al/O oxides as catalysts for the ammoxidation of propane into acrilonitrile at 500 °C has been confirmed. Their nitridation in reaction conditions is confirmed ► The best catalysts obtained where characterized by a V/Al ratio around 0.30 and exhibited selectivity to acrilonitrile of 51% at 58% conversion of these catalysts, which were partially nitrided under catalytic reaction conditions, is confirmed ► A new method of synthesis based upon the decomposition at low temperature of a mixed ammonium aluminum–vanadium oxalate has been developed. It leads to highly active catalysts, which displayed increased selectivity to acrylonitrile.

Keywords
Propane ammoxidation; Vanadium–aluminum oxy-nitride; Preparation method; Mixed ammonium oxalates
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Catalytic properties of nitrided V/Al/O-mixed oxides in the ammoxidation of propane and new efficient preparation method for the catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 192, Issue 1, 30 September 2012, Pages 10–15
Authors
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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