Journal
CATALYSIS LETTERS
Volume 152, Issue 8, Pages 2366-2374Publisher
SPRINGER
DOI: 10.1007/s10562-021-03822-2
Keywords
Metathesis; Ethylene; Butene; Propene; Molybdenum oxide
Categories
Funding
- Deutsche Forschungsgemeinschaft (DFG) [OT 586/1-1]
Ask authors/readers for more resources
The use of supports composed of mixed oxides greatly enhances the rate of propene formation, while promoting supports can significantly improve the rate of propene formation.
We investigated the effect of supports based on ZrO2, TiO2, Al2O3, and SiO2 on the rate of propene formation in the metathesis of ethylene with 2-butene at 50 degrees C over Mo-containing catalysts possessing highly dispersed MoOx. Large improvements in this rate were achieved when using supports composed of mixed oxides (ZrO2-SiO2, ZrO2-PO4, TiO2-SiO2; Al2O3-SiO2) rather than of individual oxides (ZrO2, TiO2, Al2O3, SiO2). Although previous literature studies dealing with the metathesis reaction over Al2O3- or SiO2-suppported catalysts at higher temperatures suggest the importance of redox or acidic properties of supported MoOx species for catalyst activity, we were not able to establish any general direct correlation in this regard. Contrarily, the rate of propene formation can be significantly enhanced when promoting supports with an oxide promoter. We suggest that the created support lattice defects may facilitate the transformation of MoOx to Mo carbenes under reaction conditions or improve the intrinsic activity of the latter. [GRAPHICS] .
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available