Table 5.
Summary of representative performances for graphene-based membranes in H2-based separation.
| Membrane | Separation Performance | Ref. | ||||||
|---|---|---|---|---|---|---|---|---|
| Filler | Polymer/Support | Test Condition |
Permeation Area (cm2) | P(H2) (GPU) |
Selectivity | |||
| H2/CO2 | H2/CH4 | H2/N2 | ||||||
| CGO-76 (C=Cysteamine) | Anodized Al2O3 | 1.5 bar, 25 °C | 3.14 | 52 (−45%) b |
21 (+133%) b |
- | - | [143] |
| GO (8 wt%) | PSF | 35 °C | - | 4.7 a (−61%) |
- | 29 (−51%) |
- | [135] |
| GO (8 wt%) | PI | 35 °C | - | 14 a (−55%) |
- | 82 (−39%) |
- | [135] |
| GO/PEI | Porous Al2O3 | 25 °C | 3.14 | 1000 a (−83%) |
29 (+625%) |
- | - | [139] |
| GO/EDA-2 | Porous Al2O3 | 25 °C | 3.14 | 73 (−42%) b |
23 (+35%) |
- | - | [140] |
a Permeability reported in the units of barrer; b percentage enhancement calculated with respect to pristine GO-laminated membranes; numbers in the parentheses represent the percentage enhancements with respect to the pristine polymeric membranes. PEI, polyethyleneimine; EDA-2, 2 h pre-crosslinking with ethylenediamine