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. 2022 Mar 9;8(10):eabl8160. doi: 10.1126/sciadv.abl8160

Fig. 4. Effect of PPA doping on the properties of the carbonized PBI.

Fig. 4.

(A) Thermal degradation behavior. (B) Skeletal density, bulk density, and porosity. (C) WXRD patterns. (D) Pure-gas H2/CO2 separation properties at 150°C and 11 atm. (E) CO2 solubility and CO2/C2H6 solubility selectivity at 150°C and 11 atm. Effect of temperature on (F) pure-gas H2 permeability. The lines are the best fits of Eq. 4.