Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: vanadia-titania catalysts: potassium promotion

Sortuj według:

Ogranicz wyniki do:

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

Grzybowska B.

Polish Journal of Chemistry

2001

Vol. 75, nr 10

1513-1519

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.