Research Article
Characterization and Catalytic Performance of Niobic Acid Dispersed over Titanium Silicalite
Table 1
Chemical compositions of the samples and
preparation method.
| | Sample | Code | Nb/(Nb+TS-1), wt.% | Method |
| | Titanium silicalite | TS-1 | 0.81 (gel) (*) | Direct synthesis | | Nb2O5nH2O/
TS-1 | 3Nb/TS-1 | 3.42 | Impregnation &
Hydrolysis | | Nb2O5nH2O/TS-1 | 10Nb/TS-1 | 9.92 | Impregnation &
Hydrolysis | | Nb2O5nH2O/TS-1 | 20Nb/TS-1 | 19.78 | Impregnation &
Hydrolysis | | Nb2O5 | NBO | 100 | Calcination | | Nb2O5nH2O | NBA | 100 | Hydrolysis |
|
|
(*)%Ti = Ti/(Ti+Si) in the initial gel.
|
