Abstract
Triethylphosphate impregnation of 2.8 wt% V/SiO2 and subsequent controlled calcination produced phosphorus-modified supported vanadium catalysts. Phosphorus modification enhanced the yield of maleic anhydride in the partial oxidation of butane. Varying the phosphorus to vanadium atomic ratio from 0 to 2.8 increased the selectivity to maleic anhydride from 0 to approximately 48%. The selectivity was nearly constant up to 20% butane conversion and for different O2/C4H10 ratios. The Raman spectra of the phosphorus-modified samples had bands at 1040 and 930 cm−1, and broad unresolved bands between 580 and 540 cm−1. It was concluded that the active phases in these samples were α-VOPO4.
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Harding, W.D., Birkeland, K.E. & Kung, H.H. Selective oxidation of butane on phosphorus-modified silica supported vanadia catalysts. Catal Lett 28, 1–7 (1994). https://doi.org/10.1007/BF00812463
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DOI: https://doi.org/10.1007/BF00812463