Identification of vanadium species involved in sequential redox operation of VPO catalysts
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Overview
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A vanadyl pyrophosphate (VPO) catalyst was investigated for its sequential reduction and oxidation ability for butane oxidation, using a novel oscillating microbalance reactor. Correlation of the redox kinetics with the identities of the vanadium species obtained by potentiometric titration methods suggests that only the near-surface oxygen is readily available for the oxidation of butane; effective redox cycles can only occur between V5+ and V4+; accumulation of V3+ species represents one mode of catalyst deactivation. © 2000 Elsevier Science B.V. All rights reserved.
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Applied Catalysis A: General
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Wang, Daxiang||Kung, Harold H||Barteau, Mark A
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Maleic Anhydride
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Oxidation Of Butane
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Preparation
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Redox Properties
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Vpo Catalysts
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