Table 3.
Solubility–diffusivity data of CO2 and N2 on membranes measured at 35 °C and total feed pressure of 1 bar. The pressure point is determined to be 0.2 bar for CO2 and 0.8 bar for N2.
| Membrane | Density (g/cm3) | CO2 Solubility (mol/m3.bar) | CO2 Diffusivity, × 10−12 (m2/s) | N2 Solubility (mol/m3.bar) | N2 Diffusivity, × 10−12 (m2/s) |
|---|---|---|---|---|---|
| ODPA-TMPDA | 1.286 | 1526 | 1.96 | 32.1 | 2.81 |
| 20 wt% UiO-66 | 1.210 | 1164 | 4.92 | 31.5 | 5.71 |
| 20 wt% UiO-66-NH2 | 1.330 | 1172 | 4.11 | 28.1 | 4.62 |
| 20 wt% UiO-66-Br | 1.354 | 1256 | 5.40 | 22.5 | 8.72 |
| 20 wt% UiO-66-(OH)2 | 1.380 | 1385 | 3.06 | 29.3 | 3.72 |