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林产化学与工业 ›› 2003, Vol. 23 ›› Issue (04): 59-62.

• 研究报告 • 上一篇    下一篇

磷酸-复合活化剂法制竹屑活性炭的研究

周建斌1, 张齐生2   

  1. 1. 南京林业大学 化工学院, 江苏 南京 210037;2. 南京林业大学 竹材工程研究中心, 江苏 南京 210037
  • 收稿日期:2003-05-04 修回日期:1900-01-01 出版日期:2003-12-30 发布日期:2003-12-30

STUDY ON PREPARATION OF ACTIVATED CARBON FROM BAMBOO SAWDUST BY COMPOSITE PHOSPHORIC ACID ACTIVATOR METHOD

ZHOU Jian-bin1, Zhang Qi-sheng2   

  1. 1. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;2. Bamboo Engineering Research Center, Nanjing Forestry University, Nanjing 210037, China
  • Received:2003-05-04 Revised:1900-01-01 Online:2003-12-30 Published:2003-12-30

摘要: 以竹屑为原料,用磷酸 复合活化剂(由磷酸添加一种酸性化合物A和一种盐类化合物S)法制备活性炭。研究了磷酸 复合活化剂用量、炭活化温度、炭活化时间等对活性炭的得率、灰分和pH值的影响,确定了适宜的制备竹屑活性炭工艺条件:磷酸浓度为38°Be′/60℃、添加剂A2%、添加剂S4%(A和S以磷酸质量分数计)、炭活化温度450℃、炭活化时间3h。在此条件下所得活性炭的得率为36%、灰分含量4.8%、pH值4.6。对竹屑活性炭的吸附性能、比表面积和孔隙性质也进行了分析。结果表明:竹屑活性炭的比表面积为1500m2/g、比孔容积1.10mL/g、平均孔隙半径1.46nm、焦糖脱色率(A法)120%和亚甲基蓝吸附值225mg/g。

关键词: 磷酸-复合活化剂, 竹屑, 活性炭

Abstract: An activated carbon was prepared from bamboo sawdust by a composite phosphoric acid activator method.Effects of phosphoric acid concentration, amounts of additive-A and S, carbonization-activation temperature and time on the yield, ash and pH value of the activated carbon were discussed.Suitable technological conditions were determined:phosphoric acid concentration 38°Be′/60℃, additive-A 2%, additive-S 4%(both A and S were based on phosphoric acid weight), carbonization-activation temperature 450℃, carbonization-activation time 3 h.Under the (above) conditions the yield of the actiuated carbon produced is 36%, ash is 4.8% and the pH value is 4.6.Adsorption properties, specific surface area, and pore properties of the obtained activated carbon were investigated.The results were:specific surface area 1500 m2/g, specific pore volume 1.10 mL/g, average pore radius 1.46 nm, decolorization of caramel 120% and methylene blue adsorption 225 mg/g.

Key words: composite phosphoric acid activator, bamboo sawdust, activated carbon

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