Table 4. CO2 adsorption capacity of different types of silica materials.
| No. | Materials | Surface area (m2/g) | Temperature (K) | Adsorption Capacity (mmol/g) | Ref. | |
|---|---|---|---|---|---|---|
| 1 | Silica Gel | APTES | 340 | 300 | 0.41 | 39 |
| 2 | MCM-41 | / | 1490 | 298 | 0.66 | 40 |
| / | 1030 | 303 | 0.52 | 41 | ||
| APTES | 17 | 303 | 0.98 | 41 | ||
| 3 | MCM-48 | APTES | 1390 | 298 | 0.80 | 42 |
| 4 | AMS-6 | / | 921 | 273 | ~0.80 | 43 |
| APTES | 288 | 273 | ~2.2 | 43 | ||
| 6 | SBA-15 | / | 775 | 318 | 0.44 | 44 |
| APTES | 49 | 318 | 1.70 | 44 | ||
| 7 | PMO | / | 2370 | 273 | 1.42 | Present work |
| 2370 | 298 | 0.97 |
Note: the partial pressure for CO2 adsorption is 1 bar in all cases.