Physical activation was conducted in two steps; first, cork powder was carbonized as above, and when the sample reached 750 C, N2 was switched to CO2, keeping these conditions for 2 h, with subsequent return to room temperature, as described above.
Physical activation was conducted in twosteps; first, cork powder was carbonized as above, and when thesample reached 750 C, N2 was switched to CO2, keeping these conditionsfor 2 h, with subsequent return to room temperature, as describedabove.