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Effects of Cation Promoters in Selective Catalyzation of N-Butane

Published online by Cambridge University Press:  02 July 2020

Pratibha L. Gai  and
Kostantinos Kourtakis
Pratibha L. Gai
Affiliation:
Central Research & Development, Science & Engineering Laboratories, DuPont, Experimental Station, Wilmington, DE19880-0356, USA
Kostantinos Kourtakis
Affiliation:
Central Research & Development, Science & Engineering Laboratories, DuPont, Experimental Station, Wilmington, DE19880-0356, USA
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Extract

The role of cation promoters on the microstructure and stability of complex vanadyl pyrophosphate ((VO)2P2O7 or VPO) catalysts in the selective oxidation of n-butane to maleic anhydride (MA) is of major technological importance. Although several studies have been cited in the literature on the specific activity and MA selectivity of promoted VPO, no direct evidence for the formation of solid solutions with VPO has been reported. A better fundamental understanding of the location and the complex role of promoters in the catalyst-adsorbate interactions is therefore required. We have synthesized novel promoted catalyst powders with several cations including iron and antimony, as well as with ceria. We have probed their nanostructures in n-butane directly (in-situ) at the atomic level using environmental-HREM (EHREM) and their composition by high spatial resolution depth profiling using EDX (and STEM probe size) on the nanometer (nm) scale.

Type
Nanophase and Amorphous Materials
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 742 - 743
Copyright
Copyright © Microscopy Society of America

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References

1.Bej, S.K. et al, Appl. Catal. A83, 162, 1992.CrossRefGoogle Scholar
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3. We thank L.G. Hanna, D.L. Smith, J. Borowski, D.Cline and E. Jones for support.Google Scholar