刺竹炭水蒸气活化制备柱状活性炭及其吸附性能研究  

Preparation of Cylinder Activated Carbon from(Bambusa blumeana)Bamboo Charcoal via Steam Activation and Its Adsorption Performance

作　　者：王国睿 徐光福 杜松青 汪忠华 程建新 张文标[4] WANG Guo-rui;XU Guang-fu;DU Song-qing;WANG Zhong-hua;CHENG Jian-xin;ZHANG Wen-biao(Sichuan Jinglei Science and Technology Co.,Ltd.,Yibin 643000,Sichuan,China;Zhejiang Jizhu Biotechnology Co.,Ltd.,Anji 31300,Zhejiang,China;Longyou Forestry Technology Extension Station,Longyou 324400,Zhejiang,China;School of Chemistry and Material Engineering,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China)

机构地区：[1]四川惊雷科技股份有限公司,四川宜宾643000 [2]浙江佶竹生物科技有限公司,浙江湖州313000 [3]浙江省龙游县林业技术推广站,浙江龙游324400 [4]浙江农林大学化学与材料工程学院,浙江杭州311300

出　　处：《竹子学报》2021年第3期29-35,共7页Journal of Bamboo Research

基　　金：省级重点研发计划(2021C03146)。

摘　　要：以刺竹炭为原料,通过粘结、成型和水蒸气活化制得柱状活性炭,研究不同竹焦油添加量、活化温度、活化时间对柱状活性炭性能的影响,结果表明竹焦油用量30%、活化温度850℃、活化时间3 h为最佳工艺条件,其中柱状活性炭碘吸附值为1096 mg·g^(-1)、亚甲基蓝吸附值为131 mg·g^(-1)、得率为43.33%、强度为97.89%,具有良好的吸附性能、较高的得率和强度;此外,最佳工艺条件下柱状活性炭的N_(2)等温吸附线为Ⅰ型,比表面积为875.73 m^(2)·g^(-1)、总孔容为0.471 cm^(3)·g^(-1)、微孔容为0.394 cm^(3)·g^(-1)、微孔率高达83.6%,表明制得的柱状活性炭具有发达的微孔结构。经SEM表征,柱状活性炭的炭粒轮廓清晰可见,炭粒间具有明显的孔隙结构,竹焦油经活化后的残留物较少,主要起到骨架支撑、增强柱状活性炭强度作用。Cylinder activated carbon(CAC)was prepared by steam activation of extruded(Bambusa blumeana)bamboo charcoal using bamboo tar as a binder in this work.Effects of tar addition,activation temperature and time on CAC adsorption performance were investigated.Results showed that the optimal processing was achieved by using 30%tar as binder and activating at 850℃for 3 h.The resultant CAC featured iodine number of 1096 mg·g^(-1),methylene blue adsorption of 131 mg·g^(-1),strength of 97.89%and yield of 43.33%.Moreover,a type-Ⅰ N_(2) isotherm was also observed for the CAC obtained from the optimal processing,and accordingly its specific surface area,total pore volume,micro-pore volume and micro-pore percentage were determined,being 875.73 m^(2)·g^(-1),0.471 cm^(3)·g^(-1),0.394 cm^(3)·g^(-1) and 83.6%,respectively,which demonstrated that as-prepared CAC had abundant micro-pore structure.The images of scanning electron microscope also confirmed that a clear profile of activated carbon was seen on the CAC surface,the inter-particle vacancies were noticeable,and little residues were observed after the steam activation of the tar-bonded/extruded bamboo charcoal.And according to the results,the tar served as supportive framework for extruded bamboo charcoal,and further enhanced the strength of CAC.

关 键 词：柱状活性炭 竹焦油 水蒸气活化 孔隙结构 吸附性能 

分 类 号：TQ424.1[化学工程]