Hollow fiber carbon membranes derived from poly(p-phenylene oxide) were subjected to different pyrolysis temperatures and their corresponding gas permeation characteristics were studied. Carbon membrane produced using pyrolysis temperature of 500°C was low in H 2 , O 2 , N 2 and CH 4 permeabilities, as well as H 2 /N 2 and O 2 /N 2 ideal selectivities. The highest permeabilities and ideal selectivities were obtained at 600°C. Different trend was shown by the CO 2 permeability which increased with pyrolysis temperature before decreased at 700°C. The CO 2 /CH 4 ideal selectivity consistently increased with increasing pyrolysis temperatures.
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