制革污泥热重分析及化学动力学研究  

Thermogravimetry and Kinetics Analysis of Tannery Sludge

作　　者：杜毅[1] 刘洁[1] 李彦春[1] 郑力文[1] 陈玉峰[1] 

机构地区：[1]山东轻工业学院,山东济南250353

出　　处：《中国皮革》2011年第13期37-42,共6页China Leather

摘　　要：采用热分析方法,获得了3种来源不同的制革污泥在不同升温速率下的热解特性。结果表明:污泥的热解过程大致分为3个阶段,第二阶段为污泥热失重的主要阶段。运用Coats-Redfern积分法求解后发现,大部分污泥的热解过程为二级反应。污泥B、C热解过程相似,TG曲线受升温速率影响不大,而污泥A则受其影响比较明显。当升温速率由10℃/min升高到20℃/min时,3种污泥的最终失重率都有不同程度的下降,且污泥A的最终失重率下降比较明显;污泥A的活化能有所升高,而污泥B、C的活化能则有所下降。The pyrolysis characteristics of tannery sludge from three different sources under different temperature rise rates were observed by thermal analysis. The results show that the pyrolysis process of tannery sludge can be broadly separated into three stages, and the second stage is the main sludge heat weight loss stage. Most of pyrolysis process of tannery sludge is second - order reaction by calculation using Coats - Rdefem integral method. It also shows that the pyrolysis process of sludge B and C are similar and the heating rate has little effect on curves of sludge B and C, however the clear effect on curves of sludge A is observed when the heating rate is changed from 10℃/min to 20℃/min, the finally weight loss of three sludge has different level of decline, moreover the weight loss of sludge A decreases obviously. It also can be seen that the activation energy of sludge A has some increase with the increasing of heating rate but that of sludge B and C has some decline.

关 键 词：制革污泥 热重分析 动力学 活化能 

分 类 号：X794[环境科学与工程—环境工程]