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林业科学 ›› 2004, Vol. 40 ›› Issue (3): 140-143.doi: 10.11707/j.1001-7488.20040324

• 论文及研究报告 • 上一篇    下一篇

木质炭化物对挥发性有机污染物吸附性能的研究

黄彪 高尚愚   

  1. 福建农林大学材料工程学院,南平353001;南京林业大学化学工程学院,南京210037
  • 收稿日期:2002-09-08 修回日期:1900-01-01 出版日期:2004-05-25 发布日期:2004-05-25

Study on Removal of VOC Polluting Substances by Carbonized Woody Materials

Huang Biao,Gao Shangyu   

  1. School of Material Engineering, Fujian Agriculture and Forestry University Nanping353001;School of Chemical Engineering, Nanjing Forestry University Nanjing210037
  • Received:2002-09-08 Revised:1900-01-01 Online:2004-05-25 Published:2004-05-25

摘要:

本文探讨了炭化温度对木材炭化物的得率,还原性,pH值,苯蒸气、三氯甲烷蒸气吸着率的影响。结果表明,30 0~900℃的炭化温度下,木炭的得率随着炭化温度升高而下降,并在69.8%~20.6%的范围内变化。炭化温度为700℃时,产物木炭的比表面积最大;800℃时,木炭元素组成中的(C+H)O的摩尔比值最大,这意味着该木炭的还原性最大。木炭水溶液的pH值随着炭化温度上升而增加,炭化温度小于550℃时呈酸性,大于550℃时为碱性。炭化温度对木炭环境净化能力有显著的影响,600℃炭化得到的木炭对三氯甲烷蒸气的吸附率最大,高达8 5% ,约为300℃时的5倍;800℃炭化得到的木炭对苯蒸气的吸附率最大,达5% ,约为300℃时的5倍左右。

关键词: 木炭, 炭化温度, 吸附, 三氯甲烷,

Abstract:

This paper studied on the effects of carbonizing temperatures on the yield of charcoal, reduction, pH value, specific surface area and adsorption of benzene vapor, chloroform vapor. Under this experimental condition, specific surface area of the charcoal samples is low. The results showed the largest ratio of (C+H)/O was observed at 800℃.The pH values of charcoal increased with increasing carbonization temperatures. The wood carbonized at 700℃ showed the highest specific surface area. For the largest adsorption of chloroform was observed at 600℃, the adsorption was 8.5%. The benzene adsorption capacities of the charcoal increased with increasing carbonization temperature, peaking at 800℃, the adsorption was 5%.

Key words: Wood charcoal, Carbonization temperature, Adsorption, Chloroform, Benzene