抄録
Charcoal was prepared from polyvinyl chloride resin (PVC) containing calcium carbonate in inert nitrogen flow at temperature ranging 500∼900 °C to examine the humidity control ability using adsorption isotherms of moisture. Prepared charcoal showed excellent humidity control ability due to calcium chloride formed during the carbonization. Conducting the humidity control experiments after boiled water washing, 700 °C carbonized charcoal exhibited superior humidity control to 500 °C charcoal. Calcium carbonate in the PVC is considered to be converted to calcium oxide at 700 °C, followed by forming calcium hydroxide by boiled water washing. Porous charcoal prepared with altering gases between air and nitrogen and heating pattern also revealed good humidity control compared to non-porous charcoal.
