Influence of Cr loading on the catalytic properties of CrO3/SiO2 catalysts in 2-propanol conversion

Catalytic activity of CrO₃/SiO₂ samples for 2-propanol conversion is governed by only a small amount of active centers (estimated to be around 10¹⁷ per gram of catalyst), whereas excess chromium neither develops catalytic activity nor inhibits the reaction on the active sites. Only when the chromium loading is high enough to allow formation of bulk-like agglomerates (5 wt.% Cr) is 2-propanol converted also on this CrO_x surface phase, but with a significant higher activation energy.

---

CrO₃/SiO₂ 2- ( 10¹⁷ ), . , - (5 .% Cr), 2- CrO_x , .