Table 8. Textural properties of fresh and reused Li/MCM-41 catalysta.
| Catalyst | Basicity (mmol g−1) | Basic strength (H_) |
|---|---|---|
| 5%Li/MCM-41 (fresh) | 4.70 | 9.8 ≤ H_ ≤ 15 |
| 5%Li/MCM-41 (2nd reused) | 4.27 | 9.8 ≤ H_ ≤ 15 |
| 5%Li/MCM-41 (3rd reused) | 3.73 | 7.2 ≤ H_ ≤ 9.8 |
| 5%Li/MCM-41 (4th reused) | 2.82 | 7.2 ≤ H_ ≤ 9.8 |
| 5 wt% of LiNO3 doped on 5% Li/MCM-41 (4th reused) | 7.62 | 9.8 ≤ H_ ≤ 15 |
a
Reaction conditions: catalyst loading of 5.15 wt%, DMC to enriched glycerol molar ratio of 4.24 : 1, reaction temperature of 86 °C, and reaction time of 165 min.