13C Isotope Labeling Study of Propane Ammoxidation over M1 Phase Mo-V-Te-Nb-O Mixed Oxide Catalyst

J. Phys. Chem. C, 111 (49), 18001 -18003, 2007. 10.1021/jp0775496 S1932-7447(07)07549-8
Web Release Date: November 9, 2007

¹³C Isotope Labeling Study of Propane Ammoxidation over M1 Phase Mo-V-Te-Nb-O Mixed Oxide Catalyst

N. Raveendran Shiju, Ramesh R. Kale, Suri S. Iyer, and Vadim V. Guliants*

Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0012, and Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221

Received: September 19, 2007

In Final Form: October 25, 2007

Abstract:

Direct ammoxidation of propane to acrylonitrile has been investigated recently as an alternate method for the current process based on propene. The Mo-V-Te-Nb-O mixed oxide is the most promising catalyst at present for this reaction. The reaction mechanism of propane ammoxidation over this catalyst is still not investigated experimentally. In this work, we have tested the presence of C6 intermediates during the course of the reaction using ¹³C-labeled propane. The results show that a direct pathway for the ammoxidation of propane to acrylonitrile without skeletal rearrangement of the carbon backbone operates under realistic, steady-state conditions.

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