高温炭化法制备竹炭的研究

Preparing of Bamboo Charcoal with High Temperature Carbonization

采用高温炭化法制备竹炭,探讨温度、保温时间和升温速率对竹炭吸附性能的影响,并通过N2吸附等温线对其孔隙结构进行表征。结果表明:随着温度提高、保温时间延长,竹炭的亚甲基蓝吸附值和碘吸附值呈现逐步增长的趋势;升温速率的提高,促进了炭素前驱体石墨化程度的提高,不利于竹炭孔隙结构的发达;高温炭化法可以制得微孔、中孔、大孔较发达的竹炭。在较佳的实验条件下,高温炭化法可制得亚甲基蓝吸附值和碘吸附值分别为280 mg.g-1和947.3 mg.g-1的竹炭。

High temperature carbonization process was used to prepare bamboo charcoal.The effect of temperature,holding time and temperature rate on the adsorptive properties of bamboo charcoal was discussed.The pore structures of the bamboo charcoal were characterized by N2-adsorption isotherms.It was found that as temperature and holding time went up,the adsorption value of methylene blue and iodine of the samples increased,as temperature rate enhanced,the graphitization degree of carbon precursor increased,and the pore structure decreased.High-temperature carbonization could be obtained microporous,mesoporous,macroporous more developed bamboo charcoal.Under optimized experimental condition,the adsorption value of methylene blue and iodine of the samples were 280 mg·g^-1 and 947.3 mg·g^-1,respectively.