Table 3 Gas permeation properties of the urea-containing membranes

From: Preparation of urea-containing polysilsesquioxane membranes for CO2 separation designed by model-based research

Precursor

Calcination temperature/°C

PCO2 /mol m–2s–1Pa–1 a

CO2/N2 1

Eact/kJmol–1 b CO2 N2

BTESEgU–BTESE (1:1)

300

1.3 × 10–6

13

–3.8

5.2

TTESPUEA–BTESE (1:1)

250

5.1 × 10–8

11

6.1

15

TTESPUEA–BTESE (1:1)

300

1.4 × 10–6

8.1

-4.9

1.5

BTESPU–BTESE (1:1)c

300

2.2 × 10–7

13

0.3

9.1

BTESEd

300

5.5 × 10–7

13

-4.5

2.4

  1. aMeasured at 50 °C
  2. bActivation energy for gas permeation
  3. cReference [26]
  4. dReference [25]
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