Effect of the Potassium Promoter Content in V2O5/TiO2 Catalysts on Their Physicochemical and Catalytic Properties in Oxidative Dehydrogenation of Propane

• Autorzy: Grzybowska B.
• Języki publikacji: EN

Abstrakty

EN

To optimize the content of the potassium promoter in V2O5/TiO2 system for oxidative dehydrogenation of propane ODH, the vanadia-titania catalysts of the potassium/vanadium (K/V) ratio ranging from 0.01 to 0.2 were obtained and tested in the title reaction. It has been found that the total rate of the propane consumption decreases considerably already on addition of small amounts of K (K/V = 0.01) to vanadia-titania system and only slightly at higher K content: its value is constant beginning from K/V = 0.05. The distinct increase in the selectivity to propene on addition of K is, on the other hand, observed at higher K content (K/V = 0.05-0.1). Addition of K to vanadia-titania catalysts leads to the decrease in acidity and increase in basicity of the system, as shown by measurements of the isopropanol decomposition, a probe reaction of acido-basic properties.

Słowa kluczowe

EN

vanadia-titania catalysts: potassium promotion; oxidative dehydrogenation of propane

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2001
• Tom: Vol. 75, nr 10
• Strony: 1513--1519

Twórcy

autor

Grzybowska B.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences,ul. Niezapominajek 8, 30-239 Kraków, Poland