Synthesis of Activated Carbon from Kenaf Rod by Physico-chemical Coupling Activation and Its Characterization
LIN Xing1, LIN Guanfeng2, HUANG Biao1
1 College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108 2 College of Jinshan, Fujian Agriculture and Forestry University, Fuzhou 350002
Abstract: The activated carbon was prepared from kenaf rod by conventional chemical activation and physico-chemical coupling activation. The appropria-te preparation parameters of kenaf rod based activated carbon prepared by physico-chemical coupling activation were investigated by taking three factors including activation time, activation temperature and phosphoric acid concentration into consideration. The surface functional groups, morphology characteristics, specific surface area and pore structure characteristics of the prepared activated carbon were characterized by Fourier transform infrared spectrometer(FTIR), scanning electron microscopy(SEM), automatic specific surface area and pore size analyzer(ASAP). The results indicated that the optimum preparation conditions of kenaf rod based activated carbon were phosphoric acid mass concentration of 5%, activation time of 120 min, activation temperature of 850 ℃. Under this preparation conditions, the activated carbon prepared by physico-chemical coupling activation possessed well developed mesoporous structure and contained abundant functional groups like carbonyl group, hydroxyl group and carboxyl group. The iodine adsorption value, specific surface area and total pore volume of the prepared activated carbon were 1 148 mg/g, 1 636.94 m2/g and 0.95 cm3/g, which were about 1.4 times, 2 times and 2 times of that of the ones prepared by conventional chemical activation. Compared to single chemical activation process, physico-chemical coupling activation plays an important role in the formation, developing and regulation of activated carbon pore structure by taking the advantage of synergistic activation of phosphoric acid and water vapor.
林星, 林冠烽, 黄彪1. 物理化学活化法制备红麻杆基活性炭及其表征[J]. 材料导报, 2019, 33(1): 198-202.
LIN Xing, LIN Guanfeng, HUANG Biao. Synthesis of Activated Carbon from Kenaf Rod by Physico-chemical Coupling Activation and Its Characterization. Materials Reports, 2019, 33(1): 198-202.
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2019, Vol. 33 
