Activation of n-pentane on magnesium-vanadium catalysts
(1996) Symposium on Catalytic Heterogeneous Hydrocarbon Oxidation, at the 211th National Meeting of the American-Chemical-Society — Location: NEW ORLEANS(La) (24.March.1996)
Files
No attached file found for this publication.
Details
- Authors
- Abstract
- The activation of n-pentane in the presence of oxygen has been studied over two magnesium-vanadium oxides, magnesium pyrovanadate, Mg2V2O7, and magnesium orthovanadate, Mg3V2O8, prepared by the citrate method. The catalytic behavior of mixtures consisting of magnesium vanadate and antimony oxide, 50-50 % wt, was also investigated. The X-ray diffraction patterns of the vanadates have shown that they were of high purity, while XPS measurements revealed a slight surface enrichment in magnesium. At 350-500 degrees C and atmospheric pressure, similar total n-pentane conversions were achieved with the two magnesium vanadate phases; the main products were linear unsaturated C-5 hydrocarbons, i.e. pentenes and pentadienes, and carbon oxides. Magnesium orthovanadate was more selective than the pyrovanadate towards the pure dehydrogenation reaction in comparison with the combustion one, and its selectivity was in general increased by the addition of Sb2O4 The latter had little effect on the behavior of the pyrovanadate phase. Decreasing the oxygen to alkane ratio in the feed led to a decrease in total conversion and an increase in selectivity, while the C-5 hydrocarbon product distributions were not influenced appreciably. The extent of the homogeneous reaction between pentane and oxygen was negligible for oxygen to alkane ratios in the feed equal to 0.5 and 1.0, but increased dramatically when the ratio was raised to 2.0.
- Affiliations
Citations
Korili, S., Ruiz, P., & Delmon, B. (1996). Activation of n-pentane on magnesium-vanadium catalysts. ACS Symposium Series, 638, 192-206. https://doi.org/10.1021/bk-1996-0638.ch014 (Original work published 1996)