Table 5 Optimum gas permeability of several mixed matrix membranes containing silica particles
From: Silica applied as mixed matrix membrane inorganic filler for gas separation: a review
Type of silica | Polymer matrix | Range of silica loading (%) | Optimum silica loading (%) | Optimum permeability (×  10− 10 mol m− 1 s− 1 MPa− 1) | Measurement condition | Ref | |||
|---|---|---|---|---|---|---|---|---|---|
CO2 | O2 | CH4 | H2 | ||||||
Non-porous silica | PIM-1 | 6.7–23.5 | 23.5 | 44,890 | 12,495.5 | – | 24,086.5 | 23 °C 0.345 MPa | [19] |
PVDF | 4–32 | 32 | 8.88 | 1.20 | – | – | – | [5] | |
P84 co-polyimide | 4–25 | 25 | 10.02 | 6.77 | – | – | – | [24] | |
ETPU | 5–15 | 15 | 16.21 | – | 1.27 | – | 25 °C 0.6 MPa | [44] | |
ESPU | 5–15 | 15 | 28.60 | – | 1.74 | – | |||
PU | 1–10 | 1 | 150.75 | 17.09 | 22.45 | – | 25 °C 0.1–0.4 MPa | [59] | |
PSf | 5–20 | 20 | 66.00 | 16.75 | 3.69 | – | – | [62] | |
Microporous silica | PBI | 2.8–20 | 20 | 0.04 | – | 0.03 | – | 25 °C 2 MPa | [17] |
6FDA-6FpDA-DABA | 0.5–3.0 | 1 | 93.80 | 20.10 | – | – | 35 °C 0.1 MPa | [26] | |
SPEEK | 5–20 | 20 | 87.44 | – | 5.03 | – | 25 °C 0.2 MPa | [38] | |
PPO | 1–20 | 20 | 4465.55 | – | – | 13,085.1 | 25 °C 0.2 MPa | [49] | |
PU | 2.5–30 | 2.5 | 223.45 | 12.70 | 12.13 | – | 20 °C 1 MPa | [50] | |
PBO-6FAHP-BTC | 10–20 | 20 | 2388.55 | 375.20 | 921.25 | – | 25 °C 0.1 MPa | [61] | |
Mesoporous silica | PI | 4–16 | 8 | 50.25 | – | 81.07 | 46.57 | 35 °C 0.175 MPa | [9] |
1.5–13.7 | 13.7 | 4.92 | 1.94 | – | – | 25 °C | [6] | ||
PE | 7.9–10.3 | 8.6 | 64.99 | 21.51 | – | – | 30 °C | [11] | |
PVDF | 4–32 | 32 | 9.55 | 1.37 | – | – | – | [5] | |
PES | 5–20 | 20 | 12.93 | 2.18 | 0.44 | – | 25 °C 0.8 MPa | [33] | |
PSf | 10–20 | 20 | 95.48 | – | 4.92 | – | 35 MPa | [34] | |
6FDA-DAM-DABA | 10–20 | 20 | 1222.42 | – | 37.19 | – | |||
PEBAX | 5–20 | 20 | 2519.2 | – | 132.66 | – | 25 °C 0.2 MPa | [36] | |
PEBAX/PEI | 5–20 | 20 | 5095.35 | – | 124.29 | – | |||