Ruiz Ojeda M., Fonseca Garcia L., Amado Gonzales E., 2016, Optimization of Activated Carbon Production from Chicken Manure by Chemical Activation With KOH and H3PO4 , Chemical Engineering Transactions, 50, 115-120.
The optimization of the parameters for the production of activated carbon from chicken manure was performed by chemical activation with two dehydrating agents: KOH and H3PO4 1:1, 2:1 and 3:1, carbonization temperatures of (350, 400 and 450) °C and residence times of (15, 30 and 45) min. The adsorptive capacity and surface area tests of the active carbon obtained were found. From a surface factorial design response the optimal conditions of the reagent, temperature and residence time were calculated. The amount of dehydrating agent KOH and the combination of dehydrating agent and carbonized temperature showed a significant effect on the preparation process. In the case of H3PO4, only the temperature showed a significant effect with 95% confidence level. The optimal conditions found were: 14 mL of 30 % (w/w) H3PO4 at 450°C for 15 min and 11.6 mL of 30 % (w/w) KOH at 450°C for 30 min.
