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| Catalyst | Acid site concentration, μmol g−1 | L/B | ||||||
|---|---|---|---|---|---|---|---|---|
| Brønsted (B) | Lewis (L) | Total | ||||||
| Weak | Medium | Strong | Weak | Medium | Strong | |||
| Kaolinite (AKF-78) | 1.0 | 1.0 | 3.0 | 3.0 | 3.0 | 4.0 | 15.0 | 2.0 |
| KNT | 0 | 3.0 | 1.0 | 5.0 | 2.0 | 1.0 | 12.0 | 2.0 |
| KNT-Pir | 1.0 | 3.0 | 5.0 | 27.0 | 6.0 | 7.0 | 49.0 | 4.4 |
| HNTa | 12.0 | 1.0 | 0 | 17.0 | 4.0 | 0 | 34.0 | 1.6 |
| HNT-Pir | 30.0 | 10.0 | 0 | 12.0 | 7.0 | 0 | 59.0 | 0.5 |
The data from ref. 4.
