【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.更多还原

【Abstract】 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.更多还原