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Catalytic Properties of Silver Vanadium Phosphates in n ‐Butane Oxidation – Considerations on the Impact of the [V x O y ] Substructure
Author(s) -
Karpov Andrey,
Dobner CorneliaKatharina,
Glaum Robert,
Schunk Stephan Andreas,
Rosowski Frank
Publication year - 2011
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201100096
Subject(s) - butane , vanadium , catalysis , maleic anhydride , selectivity , chemistry , inorganic chemistry , nuclear chemistry , medicinal chemistry , organic chemistry , polymer , copolymer
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+δ (0 ≤ δ ≤ 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+δ (0 ≤ δ ≤ 0.5) is the only compound with selectivity to maleic anhydride. A structure‐property relationship for the prepared catalysts is discussed.