Effect of dehydration of VOPO4·2H2O on the preparation and reactivity of vanadium phosphate catalyst for the oxidation of n-butane

F. Javier Cabello Sanchez , J A Lopez-Sanchez, Richard Peter Kerwin Wells, C Rhodes, A Z Isfahani, G Hutchings

Research output: Contribution to journalArticle

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Abstract

The effect of drying of VOPO4.2H(2)O on the preparation of vanadium phosphate catalysts for the selective oxidation of n-butane to maleic anhydride is described and discussed. It is found that partially dehydrated samples of the dihydrate containing small amounts of alpha(I)-VOPO4 are formed when the material is initially dried. The presence of this impurity leads to a final catalyst containing trace amounts of alpha(I)-VOPO4 in combination with (VO)(2)P2O7 and this combination leads to a catalyst with a higher activity but with a lower selectivity to maleic anhydride. The drying stage is also found to influence the surface area and intrinsic activity of the activated catalyst.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalCatalysis Letters
Volume77
Issue number4
DOIs
Publication statusPublished - 2001

Fingerprint

Vanadium
Butane
Dehydration
Phosphates
Maleic Anhydrides
Oxidation
Catalysts
Maleic anhydride
Drying
Impurities
butane

Keywords

  • vanadium phosphate preparation
  • n-butane oxidation
  • maleic anhydride
  • transformation
  • VOPO4

Cite this

Effect of dehydration of VOPO4·2H2O on the preparation and reactivity of vanadium phosphate catalyst for the oxidation of n-butane. / Sanchez , F. Javier Cabello; Lopez-Sanchez, J A ; Wells, Richard Peter Kerwin; Rhodes, C ; Isfahani, A Z ; Hutchings, G .

In: Catalysis Letters, Vol. 77, No. 4, 2001, p. 189-192.

Research output: Contribution to journalArticle

Sanchez , F. Javier Cabello ; Lopez-Sanchez, J A ; Wells, Richard Peter Kerwin ; Rhodes, C ; Isfahani, A Z ; Hutchings, G . / Effect of dehydration of VOPO4·2H2O on the preparation and reactivity of vanadium phosphate catalyst for the oxidation of n-butane. In: Catalysis Letters. 2001 ; Vol. 77, No. 4. pp. 189-192.
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AU - Rhodes, C

AU - Isfahani, A Z

AU - Hutchings, G

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AB - The effect of drying of VOPO4.2H(2)O on the preparation of vanadium phosphate catalysts for the selective oxidation of n-butane to maleic anhydride is described and discussed. It is found that partially dehydrated samples of the dihydrate containing small amounts of alpha(I)-VOPO4 are formed when the material is initially dried. The presence of this impurity leads to a final catalyst containing trace amounts of alpha(I)-VOPO4 in combination with (VO)(2)P2O7 and this combination leads to a catalyst with a higher activity but with a lower selectivity to maleic anhydride. The drying stage is also found to influence the surface area and intrinsic activity of the activated catalyst.

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KW - transformation

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