KOH活化杨木制备活性炭的特性研究  

Characteristic Study on Preparation of Activated Carbon from Poplar Wood by KOH Chemical Activation

作　　者：李润霞[1] 李占勇[1] 董鹏飞[1] 叶京生[1] 

机构地区：[1]天津科技大学机械工程学院,天津300222

出　　处：《天津科技大学学报》2011年第4期44-47,56,共5页Journal of Tianjin University of Science & Technology

摘　　要：通过热重法对杨木颗粒以及用KOH浸渍后的杨木颗粒进行热解实验,通过TG、DTG、DSC曲线的变化规律,分析在主要失重阶段发生的物理变化、化学变化以及炭得率.结果表明:活化剂KOH中的K+对木材的热解具有催化作用,形成活性炭的温度基本为600,℃,温度高于800,℃时,活性炭发生烧失反应;升温速率对炭得率几乎没有影响;加入活化剂KOH后,提高了炭得率,但是炭得率与活化剂/杨木颗粒的质量比值成反比.The pyrolysis experiments were carried out with the poplar wood and the poplar wood impregnated by KOH through the thermogravimetric analysis. The obtained TG/DTG/DSC curves were investigated, and the chemical and physical changes in major degradation stages as well as activated carbon yield were analyzed. The results showed that the K- in acti- vated agent KOH had catalytic effect on wood pyrolysis. Activated carbon was generally produced at 600 ℃. The activated carbon was reacted and lost when the temperature higher than 800 ℃. The heating rate has little effect on the carbon yield, which was improved by KOH, but the yield was inversely proportional to the mass ratio of KOH and poplar wood particles.

关 键 词：杨木 化学活化 热重法 活性炭 炭得率 

分 类 号：TQ351.21[化学工程]