Fig. 3. E2ect of impregnation ratio on the activation and yield.
as the fourth-order polynomial in the time range
10–60 min considered. As the time was increased,
the volatile matters got enough time to escape, making
the yield lower.
Fig. 3 shows the inGuence of impregnation ratio on
activation. Activation increased with impregnation ratio
sharply up to 50% of impregnation ratio. Further
increase in impregnation ratio caused a little increase
in activation. After 140% of impregnation ratio the
increase was marginal. The iodine number curve was
Ctted as the fourth-order polynomial in the range between
20% and 140% impregnation ratios. Yield increased
with impregnation ratio but it was marginal
beyond an impregnation ratio of 40%. The yield trend
line can be stated as the Cfth-order polynomial with
an R2 value of 0.99.
In comparison with activated charcoal produced
from charcoal (from beech wood sawmill wastes)