水蒸气活化制备烟杆基颗粒活性炭的研究  

STUDY ON THE PREPARATION OF GRANULAR ACTIVATED CARBON FROM TOBACCO STEMS ACTIVATION BY STEAM

作　　者：夏洪应[1] 彭金辉[1] 张利波[1] 涂欣达[1] 马祥元[1] 涂建华[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,昆明650093

出　　处：《离子交换与吸附》2007年第2期112-118,共7页Ion Exchange and Adsorption

基　　金：国家自然科学基金(项目编号:20167001)

摘　　要：以烟杆废弃物为原料,以木焦油为主的复合粘结剂,通过水蒸气活化制备了烟杆基颗粒活性炭。对影响颗粒活性炭吸附性能和收率的因素如活化温度、活化时间、水蒸气流量进行了系统研究,得到了最佳工艺条件:活化温度为900℃,活化时间为60min,水蒸气流量为3.31g/min。该工艺条件下,烟杆基颗粒活性炭对碘的吸附值为1028mg/g,对亚甲基蓝的吸附值为285mg/g,收率为24.39%。同时,测定了该活性炭氮吸附,通过BET计算了活性炭的比表面积,并通过密度函数理论(DFT)表征了活性炭的孔结构。结果表明,该活性炭为微孔型,BET比表面积为1073m2/g,总孔容为0.8152ml/g。A series of granular activated carbons were prepared, using tobacco stems as materials, wood tar as the mainly binder and steam as the activation agent. The effect of process variables such as activation temperature, activation time and flow rate of steam on yield and adsorption properties was systematically studied. The optimum preparation parameters were obtained as follows： activation temperature was 900℃, activation time was 60 minutes and flow rate of steam was 3.31g/min. The yield of the granular activated carbon was 24.39% when the methylene blue adsorption reached 285mg/g and the iodine number was 1028mg/g. Furthermore, the granular activated carbon in optimum condition was characterized by N2 adsorption at 77K, using the BET and DFT methods. The BET surface area and pore volume were 1073m^2/g and 0.8152mL/g, respectively. It shown that the granular activated carbon possessed predominant microporous structures.

关 键 词：颗粒活性炭 水蒸气 烟杆 孔径分布 

分 类 号：TQ424.1[化学工程]