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The Influence of Structural Properties of γ-Alumina Supported VOx Catalysts on the Reaction Network of Selective Oxidation of Ethane

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Wolff,  T.
Physical and Chemical Foundations of Process Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society;

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Joshi,  M.
Physical and Chemical Foundations of Process Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society;

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Seidel-Morgenstern,  A.
Physical and Chemical Foundations of Process Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society;
Otto-von-Guericke-Universität Magdeburg, External Organizations;

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Klose, F., Wolff, T., Joshi, M., Seidel-Morgenstern, A., Suchorski, Y., & Weiss, H. (2005). The Influence of Structural Properties of γ-Alumina Supported VOx Catalysts on the Reaction Network of Selective Oxidation of Ethane. Talk presented at 5th World Congress on Oxidation Catalysis. Sapporo, Japan. 2005-09-25 - 2005-09-30.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-9BB0-2
Abstract
Two series of γ-alumina supported VOx catalysts with V loadings between 1 and 15 wt.-% prepared by different techniques were studied due their performance in selective oxidation of ethane. Additionally, experiments on the oxidation of ethylene and CO were performed in order to clarify the contributions of consecutive reactions. The results obtained demonstrate, that at low V loadings, corresponding to a high V dispersion, a higher ethylene selectivity is obtained than at higher loaded catalysts. This is especially due to a higher activity of V2O5 for consecutive ethylene oxidation to CO. Additionally, the redox cycles of vanadate and V2O5 are different: the first is mainly only between V(IV) and V(III), in contrast to the latter one, which is between V(V) and V(III)