Table 2. Textural Properties of Potassium Salt-Loaded Hydrotalcites.
| entry | sample | BET area (m2 g–1) | pore volume (cm3 g–1) | pore diameter (nm) | base strengths (H–) | total basicity (mmol g–1) | soluble basicity (mmol g–1) |
|---|---|---|---|---|---|---|---|
| 1 | HT | 207 | 0.23 | 3.30 | 9.6 < H– < 11.1 | 0.12 | 0.00a |
| 0.00b | |||||||
| 2 | KF/HT | 197 | 0.32 | 3.38 | 12.7 < H– < 15 | 0.18 | 0.02 |
| 3 | KHCO3/HT | 184 | 0.25 | 3.95 | 9.6 < H– < 11.1 | 0.18 | 0.03 |
| 4 | K2CO3/HT | 90 | 0.19 | 3.99 | 12.7 < H– < 15 | 0.23 | 0.05 |
| 5 | KNO3/HT | 201 | 0.32 | 3.66 | 12.7 < H– < 15 | 0.19 | 0.00 |
| 6 | KOH/HT | 185 | 0.36 | 4.00 | 12.7 < H– < 15 | 0.22 | 0.03 |
a
Hydrotalcite.
b
Reconstructed hydrotalcite obtained by immersion of MgAl mixed oxide in water for 24 h.