Activated carbons have been prepared from the chips of Moabi by chemical activation. We first carried out the chemical characterization (chemical composition, functional groups) of the chips of Moabi.The chemical characterization gave us extends of cellulose (40.5%) and lignin (29.6%) while an average pore volume is equal to 52.1% and its degree of crystallinity founded is 52%.We also characterize the sample with the scanning electron microscopy.
Secondly, the optimizations of conditions for preparation have been done. The parameters investigated concerned temperature (600 and 700°C), heating rate(1 and 3°C), the residence time ( 2 and 5 hours) for the carbonization process while, the concentration of NaOH (20%, 40% and 60%), the time of the impregnation (2 and 6hours) and the impregnation ratio of biomass/reagent(NaOH)(1/20 and 1/15) for the activation process. The calculation of the iodine numbers conducted to choose the best conditions of preparation of our activated carbons. The optimum conditions retained were: 700°C, 1°C/min and 2 hours for carbonization process and 20%, 2 hours and 1/15 for activation process, which gave us the iodine number of 629 ± 13mg/g. This Iodine number obtained is compared to those of commercial activated carbons.
Optimization, activated carbon, moabi, chemical activation, iodine number.