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Effect of the pretreatment of Fe-silicalite on its activity in the ammoxidation of propane

Paper ID Volume ID Publish Year Pages File Format Full-Text
55615 47059 2012 5 PDF Available
Title
Effect of the pretreatment of Fe-silicalite on its activity in the ammoxidation of propane
Abstract

The catalytic performance of Fe-silicalite activated by gas reduction-nitridation (GRN) was studied in the direct ammoxidation of propane with molecular oxygen as the only oxidizing agent. It has been demonstrated that the presence of the reducing agent, propane, is indispensable in order to obtain active catalyst. Relatively mild conditions of the pretreatment, temperature 540 °C, short time of the activation (5 h) and small flow of ammonia with propane resulted in the active and selective catalyst (44% selectivity to acrylonitrile at 25% conversion of propane). Pretreated catalyst reached interesting results also in the term of productivity. Moreover it was found out, that once nitrided catalyst does not deactivate and during the time on stream the selectivity to acrylonitrile does not decline.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (231 K)Download as PowerPoint slideHighlights► Study of the performance of activated Fe-silicalite in the ammoxidation of propane. ► Gas reduction-nitridation is an efficient method of the activation of the catalyst. ► Up to 48% of acrylonitrile selectivity at propane conversion of 25% was reached. ► High acrylonitrile to acetonitrile ratio (ACN/AcCN = 12) was obtained.

Keywords
Gas reduction-nitridation; Pretreatment; Fe-silicalite; Ammoxidation; Acrylonitrile; Propane
First Page Preview
Effect of the pretreatment of Fe-silicalite on its activity in the ammoxidation of propane
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 179, Issue 1, 5 January 2012, Pages 73–77
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis