ACTIVATED CARBONS FROM EUCALYPTUS WOOD - INFLUENCE OF THE CARBONIZATION TEMPERATURE

CO2 activation of eucalyptus wood chars obtained at 400, 600, and 800 degrees C has been studied. The carbonization stage develops an incipi ent microporosity. The micropore volume and width increase with increa sing temperature. Partial gasification of these chars with CO2 allows one to obtain activated carbons which show differences in micropore si ze distribution depending on the temperature at which the starting cha r was obtained. No significant effect on mesoporosity development was noticed whereas lower macropore volumes were obtained with activated c arbons resulting from the char prepared at the highest temperature (80 0 degrees C).