KOH活化木屑生物炭制备活性炭及其表征

doi:10.3724/SP.J.1095.2013.20492

摘要/Abstract

摘要： 以木屑热裂解的生物质炭为原料，氢氧化钾为活化剂，采用化学活化法制备活性炭，探讨了碱炭比、活化温度和活化时间对活性炭吸附亚甲基蓝吸附值的影响。利用N2吸附实验、XRD和FTIR等实验技术，对原料与制备活性炭的结构与性能进行了表征。结果表明，在碱炭质量比为1.5、活化温度750 ℃、活化时间2 h的条件下，所制备的活性炭对亚甲基蓝吸附值为255 mg/g，BET总比表面积为1514 m2/g，中孔比表面积为110 m2/g，吸附总孔容为0.821 cm3/g，中孔孔容为0.117 cm3/g，吸附平均孔径为2.170 nm。

关键词: 生物质炭, 化学活化, 活性炭

Abstract: The activated carbon was prepared from pyrolysis bio-char of sawdust by chemical activation with KOH. The influences of the mass ratio of alkali to carbon, activation temperature and hold time toward the methylene blue adsorption on activated carbon were investigated. After this, the structure and properties of raw materials and activated carbon were characterized by nitrogen adsorption, XRD and FTIR spectroscopies. The results show that the methylene blue adsorption on activated carbon reaches to 255 mg/g at an alkali to carbon mass ratio of 1.5, an activation temperature of 750 ℃ and a hold time of 2 h. The activated carbon possesses a large apparent surface area(SBET=1514 m2/g) and high adsorption pore volume(V=0.821 cm3/g) with average pore size diameter of 2.170 nm.

Key words: bio-char, chemical activation, activated carbon

中图分类号:

O647.3

余峻峰, 陈培荣, 俞志敏, 彭书传, 巫杨. KOH活化木屑生物炭制备活性炭及其表征[J]. 应用化学, DOI: 10.3724/SP.J.1095.2013.20492.

YU Junfeng1, CHEN Peirong2, YU Zhimin3,4*, PENG Shuchuan1, WU Yang3. Preparation and Characteristic of Activated Carbon from Sawdust Bio-char by Chemical Activation with KOH[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2013.20492.

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