A high-throughput reactor system for optimization of Mo–V–Nb mixed oxide catalyst composition in ethane ODH

H. Zhu, P. Laveille, D.C. Rosenfeld, M.N. Hedhili and J.-M. Basset
Catal. Sci. Technol., 5, pp. 4164-4173, (2015)

A high-throughput reactor system for optimization of Mo–V–Nb mixed oxide catalyst composition in ethane ODH

Keywords

Reactor system, Optimization, MoVNb mixed oxide catalyst

Abstract

​75 Mo–V–Nb mixed oxide catalysts with a broad range of compositions were prepared by a simple evaporation method, and were screened for the ethane oxidative dehydrogenation (ODH) reaction. The compositions of these 75 catalysts were systematically changed by varying the Nb loading, and the Mo/V molar ratio. Characterization by XRD, XPS, H2-TPR and SEM revealed that an intimate structure is formed among the 3 components. The strong interaction among different components leads to the formation of a new phase or an “intimate structure”. The dependency of conversion and selectivity on the catalyst composition was clearly demonstrated from the results of high-throughput testing. The optimized Mo–V–Nb molar composition was confirmed to be composed of a Nb content of 4–8%, a Mo content of 70–83%, and a V content of 12–25%. The enhanced catalytic performance of the mixed oxides is obviously due to the synergistic effects of the different components. The optimized compositions for ethane ODH revealed in our high-throughput tests and the structural information provided by our characterization studies can serve as the starting point for future efforts to improve the catalytic performance of Mo–V–Nb oxides.

Code

DOI: 10.1039/C5CY00488H

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