Abstract
The effects of the nature of silica support and removal of soluble vanadium species by ethanol on the catalytic properties of silica-supported VPO catalysts were investigated. Ethanol preferentially removes V+5 species. For a silica-supported sample of PIV ratio much lower than two, ethanol treatment resulted in a sample of higher PIV ratio and higher selectivity for maleic anhydride in butane oxidation. The crystalline VPO phases formed differed on a hydrophobic vs. hydrophilic silica. (VO)2P2O7 could be formed more easily on the former support. Interestingly, for all silica-supported catalysts, the maleic anhydride selectivity depended much more strongly on the PIV ratio than on the method of preparation, the nature of the silica, or the crystalline VPO phase present.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 101-110 |
| Number of pages | 10 |
| Journal | Catalysis Today |
| Volume | 43 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Aug 13 1998 |
Funding
This work was supported by the U.S. Department of Energy, Basic Energy Sciences. J.M.C. Bueno acknowledges support from CNPq (Brasil) Conselho Nacional de Desenvolvimento Cientifica e Tecnologico. Cab-O-Sil silica was provided by Cabot Corporation. A. Chu Kung assisted in collecting diffuse reflectance spectra, and G.W. Sutton assisted in collecting reaction data and XRD spectra.
Keywords
- Butane oxidation on supported vpo catalyst
- Maleic anhydride by butane oxidation
- Preparation of supported vpo catalysts
- Vpo catalysts supported
ASJC Scopus subject areas
- Catalysis
- General Chemistry