| Catalyst code | Catalyst composition | Precursor |
| ALH 12 | TiO2 | TiCl4 |
| ALH 13 | (0.5 M) | TiCl4 |
| ALH 14 | (1 M) | TiCl4 |
| ALH 15 | TiO2/Nb (3%) | TiCl4 |
| ALH 16 | TiO2/Nb (5%) | TiCl4 |