Abstract
Vanadium-titanium catalysts modified with phosphorus additives (1-15 wt.% of P2O5) have been studied in methylpyrazine ammoxidation. Introduction of high amounts of the additive (≥ 10 wt.% of P2O5) results in a decrease in activity and selectivity of the catalysts due to formation of low active phase - a ternary compound with the component ratio V : P : Ti ≈ 1 : 1 : 1 with only one type of slightly distorted tetrahedral vanadium (5+) bound via oxygen to phosphorus (5+). The nature of the active sites of the samples modified with 1-5 wt.% of P2O5, similarly to that in the V-Ti-O catalyst, was found to include the V5+ cations strongly bound with TiO2 and located in the significantly distorted octahedral oxygen environment.
Similar content being viewed by others
REFERENCES
B. Grzybowska-Swierkosz: Appl. Catal. A., 157, 262 (1997).
V.M. Bondareva, T.V. Andrushkevich, O.B. Lapina, V.V. Malakhov, L.S. Dovlitova, A.A. Vlasov: Kinet. Katal., 41, 794 (2000).
V.M. Bondareva, T.V. Andrushkevich, O.B. Lapina, A.A. Vlasov, L.S. Dovlitova, E.B. Burgina, G.S. Litvak: Catal. Lett., in press.
O.B. Lapina, D.F. Khabibulin, A.A. Shubin, V.M. Bondareva: J. Mol. Catal., 162, 373 (2000).
V.V. Malakhov, A.A. Vlasov: Kinet. Catal., 36, 460 (1995).
C. Fernandez, P. Bodart, J.P. Amoureux: Solid-State NMR, 3, 79 (1994).
A.A. Shubin, O.B. Lapina, V.M. Bondareva: Chem. Phys. Lett., 302, 341 (1999).
V.M. Bondareva, T.V. Andrushkevich, G.A. Zenkovets: Kinet. Katal., 38, 720 (1997).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bondareva, V., Andrushkevich, T., Lapina, O. et al. Ammoxidation of methylpyrazine over phosphorus-modified vanadium-titanium catalysts. Reaction Kinetics and Catalysis Letters 79, 165–173 (2003). https://doi.org/10.1023/A:1024180322453
Issue Date:
DOI: https://doi.org/10.1023/A:1024180322453