Microporous carbons were produced by an activation using air from Japanese cypress charcoal. Effects of activation time, activation temperature, and air flow rate on the yield, porosity, and adsorption property of the microporous carbons were examined and the following results were obtained.
(1) The weight loss increases linearly with activation time.
(2) The formation efficiency of pore which has an adsorption ability increases with activationtemperature.
(3) When the weight loss is above 95 %, the adsorption ability decreases.
(4) The activation efficiency increases with decreasing air flow rate.
(5) As activation temperature and air flow rate are constant, the specific surface area and mean pore diameter increase with activation time.
(6) As the specific surface area is constant, the mean pore diameter decreases with increasingactivation temperature.
(7) The mean pore diameter increases with weight loss.
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