The impregnated and dried material was later carbonized in a
stainless steel tubular reactor, which was placed in an oven at a
heating speed of 10 C min1 until the set activation temperature
was reached. Three different activation temperatures (400 C,500 C, and 600 C) were considered and these were maintained for
60 min. During the activation process, a 100 cm3 min1 nitrogen
flow was used through the reactor to create an inert atmosphere
and to remove the formed vapor by entrainment.
In this study the sample nomenclature assigned is as follows:
AG = aguaje stones and OL = olive stones, follow by the impregnation
ratio, and the activation temperature in Celsius degree (C).
For example, the sample AG0.75_600 was prepared from aguaje
stones, with an acid impregnation ratio of 0:75gH3PO4 =gprecursor, and
an activation temperature of 600 C.