Table 5. Comparison of CO2 Adsorption Capacity by Different MgO Adsorbents at Different Conditions as Cited in the References, and the Obtained Values of Our Adsorbent Mg(OH)2-20% F Calcined at 400 and 500 °C as the Most Active Onea.
| experimental
conditions |
|||||
|---|---|---|---|---|---|
| adsorbent | SBETm2·g–1 | temp. (°C) | CO2(vol %) | mgCO2·g–1 and mmolCO2·g–1 | reference |
| Mg(OH)2-20%F-400 °C | 153.22 | at 5 | 100% | 103.9 mgCO2 | this work |
| 2.36 mmolCO2 | |||||
| at 30 | 100% | 89.4 mgCO2 | this work | ||
| 2.03 mmolCO2 | |||||
| 103.06 | at 5 | 100% | 82.1 mgCO2 | this work | |
| Mg(OH)2-20%F-500 °C | 1.86 mmolCO2 | ||||
| at 30 | 100% | 55.5 mgCO2 | this work | ||
| 1.26 mmolCO2 | |||||
| metal–organic framework (MOF) | N.C. | at 25 | 100% | 114.96 mgCO2 | (64) |
| glass industry waste | |||||
| waste SiO2 | 16.82 | at 20 | 50% | 0.71 mmolCO2 | (65) |
| waste Al2O3 | 7.28 | at 20 | 50% | 0.68 mmolCO2 | (65) |
| *MgO | 350.0 | at 30 | 100% | 30.0 mgCO2 | (66) |
| *MgO-APTES | 134.0 | at 30 | 100% | 65.7 mgCO2 | (66) |
| *MgO-DETA | 91.0 | at 30 | 100% | 47.7 mgCO2 | (66) |
| *MgO-PEI | 72.0 | at 30 | 100% | 23.9 mgCO2 | (66) |
| **MgO-SR adsorbent | 100.0 | at 200 | 10% | 2.39 mmolCO2 | (67) |
| CeO2 | 333.0 | at 30 | 100% | 10.4 wt % | (68) |
a
N.C.-not calculated, *MgO modified with 3-aminopropyl-triethoxysilane (APTES), diethylenetriamine (DETA), and polyethylenimine (PEI), **Prepared by a solid-state reaction.