Abstract
Three magnesium vanadate phases, i.e., MgV2O6 (metavanadate), α-Mg2V2O7 (pyrovana-date) and Mgs V2O8 (orthovanadate), have been successfully prepared with high purity by the citrate method at a relatively low temperature (550°C). FT-IR, LRS, XRD and SEM techniques have been used to characterize these vanadate phases. The effect of calcination temperature has also been investigated. It was found that the particle size and morphology of the MgV2O6 phase, which is a function of calcination temperature, appear to have a strong effect on the infrared spectra. Furthermore, the catalytic properties of the three phases were examined in the oxidative dehydrogenation of propane. The propene selectivity follows the order: α-Mg2V2O7 > Mg3 Vg2O8 > MgV2O6, which is consistent with their redox properties. This fact suggests that there is some correlation between the catalytic and redox properties of these magnesium vanadate phases.
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M.A. Chaar, D. Patel, M.C. Rung and H.H. Rung, J. Catal. 105 (1987) 483.
M.A. Chaar, D. Patel and H.H. Rung, J. Catal. 109 (1988) 463.
D. Siew Hew Sam, V. Soenen and J.C. Volta, J. Catal. 123 (1990) 417.
D. Patel, M.C. Rung and H.H. Rung, in:Proc. 9th Int. Congr. on Catalysis, Vol. 4, Calgary 1988, eds. M.J. Phillips and M. Ternan (Chem. Inst. of Canada, Ottawa, 1988) p. 1553.
M.C. Kung and H.H. Rung, J. Catal. 134 (1992) 668.
J. Hanuza, B. Jerowska-Trebiatowska and W. Oganowski, J. Mol. Catal. 29 (1985) 109.
F.D. Hardcastle and I.E. Wachs, J. Phys. Chem. 95 (1991) 5031.
Ph. Courty, H. Ajot, Ch. Marcilly and B. Belmon, Powder Technol. 7 (1973) 21.
A. Nord et al., Chim. Scripta 25 (1985) 212 (ASTM file No. 37-351).
G. Clark and R.J. Morley, J. Solid State Chem. 16 (1976) 1429 (ASTM file No. 31-816).
F. Parker and McCauley, private communication (ASTM file No. 34-13).
M. Ocana, V. Fomes, J.V. Garcia Ramos and C.J. Serna, J. Sol. Stat. Chem. 75 (1988) 364.
R. Gopal and C. Calvo, Acta. Cryst. 830 (1974) 2491 (ASTM file No. 29-877).
X.T. Gao et al., submitted.
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Gao, X., Ruiz, P., Xin, Q. et al. Preparation and characterization of three pure magnesium vanadate phases as catalysts for selective oxidation of propane to propene. Catal Lett 23, 321–337 (1994). https://doi.org/10.1007/BF00811367
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DOI: https://doi.org/10.1007/BF00811367