Catalytic Properties of Silver Vanadium Phosphates in n-Butane Oxidation – Considerations on the Impact of the [VxOy] Substructure
✍ Scribed by Dr. Andrey Karpov; Cornelia-Katharina Dobner; Prof. Dr. Robert Glaum; Dr. Stephan Andreas Schunk; Dr. Frank Rosowski
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- German
- Weight
- 521 KB
- Volume
- 83
- Category
- Article
- ISSN
- 0009-286X
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✦ Synopsis
Herbert Vogel on the occasion of his 60th birthday
Catalysts based on silver vanadium phosphates with a general chemical formula Ag 2 VP x O d (1 ≤ x ≤ 2; 6 ≤ d ≤ 8) have been prepared and tested in gas phase oxidation of n-butane. This general chemical formula comprises the two known phosphates Ag 2 (V V O 2 )PO 4 (x = 1; d = 6) and Ag 2 (V IV O)P 2 O 7 (x = 2; d = 8) and one novel compound with an approximate composition Ag 2 V IV,V P 1.6 O 7+d (0 ≤ d ≤ 0.5). Among the prepared compounds, Ag 2 (V V O 2 )PO 4 shows the highest activity while Ag 2 (V IV O)P 2 O 7 is completely inactive. The novel phase Ag 2 V IV,V P 1.6 O 7+d (0 ≤ d ≤ 0.5) is the only compound with selectivity to maleic anhydride. A structure-property relationship for the prepared catalysts is discussed.