碱木质素基活性炭的制备与孔结构特征  

Preparation and Pore Features of Soda Lignin-based Activated Carbon

作　　者：张冠中[1] 赵师辛 陈梦涵 林剑[1] 王霁[1] ZHANG Guang-zhong ZHAO Shi-xin CHEN Meng-han LIN Jian WANG Ji(Beijing Key Laboratory of Wood Science and Engineering,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学木材科学与工程北京市重点实验室,北京100083

出　　处：《林业机械与木工设备》2017年第2期35-39,共5页Forestry Machinery & Woodworking Equipment

基　　金：北京林业大学"国家级大学生创新创业训练计划"项目(201610022057);北京市教委科学研究与研究生培养共建项目--重点学科(2015)

摘　　要：为高值化利用碱木质素,本研究采用不同活化方法制备碱木质素基活性炭,通过氮气吸附-脱附和扫描电镜表征其孔隙结构和表观形貌,结果表明:1炭化处理不利于碱木质素在活化过程中孔隙的生成,未炭化处理的碱木质素基活性炭的比表面积和孔容相对较高;2氯化锌活化比水蒸气活化碱木质素可获得更高的比表面积和孔容,分别达到1 600 m^2/g和1.16 cm^3/g,二次活化对碱木质素基活性炭具有扩孔作用,尤其是水蒸气与氯化锌同时活化的扩孔作用更明显,使其比表面积相对减少,而孔容略微增加;3碱木质素基活性炭的孔径主要分布于超微孔0.5~0.6 nm、微孔0.8~2 nm和中孔3~10 nm三个区域,二次活化可使微孔减少中孔增加,并相对均匀地分布在活性炭表面。To promote the high value-added utilization of soda lignin,soda lignin-based activated carbon（ AC） is prepared with various activation methods,with pore structure and apparent morphology characterized through nitrogen adsorption-desorption and scanning electron microscopy. The results show： 1carbonization is not conducive to the generation of pores of soda lignin in the activation process and the specific surface area and pore volume of the soda lignin not subjected to carbonization are relatively higher; 2higher specific surface area（ 1600 m-2/ g） and pore volume（ 1. 16 cm-3/ g） can be obtained through zinc chloride-based activation than vapor-based activation,and the pore enlarging role is significantly enhanced when vapor and zinc chloride are used for activation simultaneously,with the specific surface area relatively reduced,pore volume slightly increased; 3the pore diameter of soda lignin-based AC is mainly distributed in three areas,i. e. 0. 5 nm-0. 6 nm（ ultro-micropores） and 0. 8 nm-2 nm（ micropores）as well as 3 nm-10 nm（ mesopores） and secondary activation can reduce the number of micropores and increase the number of mesopore,which are relatively evenly distributed on the surface of AC.

关 键 词：碱木质素 活性炭 氮气吸附 孔结构 

分 类 号：TS612[轻工技术与工程]