Table 2. Basicity Measurements Calculated Based on TG-TPD Curves of Pyrrole over Mg(OH)2 + x % F Adsorbents Calcined, for 3 h in Air, at 400 and 500 °C.
| calcined
at 400 °C |
calcined
at 500 °C |
|||||
|---|---|---|---|---|---|---|
| adsorbent | SBET(m2·g–1) | apyrrole RT–400 °C(mgpyrr·g–1) | btotal no. of basic sites(site·g–1) | SBET(m2·g–1) | apyrrole RT–500 °C(mgpyrr·g–1) | btotal no. of basic sites (site·g–1) |
| Mg(OH)2 + 20% F | 153.22 | 62.5 | 5.61 × 1020 | 103.06 | 82.4 | 7.39 × 1020 |
| Mg(OH)2 + 30% F | 117.16 | 56.7 | 5.09 × 1020 | 81.93 | 60.2 | 5.40 × 1020 |
| Mg(OH)2 + 40% F | 88.27 | 35.1 | 3.15 × 1020 | 58.32 | 33.4 | 3.00 × 1020 |
| Mg(OH)2 + 50% F | 72.22 | 26.3 | 2.36 × 1020 | 39.7 | 21.6 | 1.93 × 1020 |
a
Mass loss calculated from TG-TPD curves.
b
Total number of basic sites (sites per gsolid).