废弃离子交换树脂燃烧机理研究

Study on Combustion Mechanism of Waste Ion Exchange Resins

采用热重分析及化学反应动力学研究了3种废弃离子交换树脂(WIER)的燃烧机理。结果表明:3种WIER具有相似的燃烧特性,并且均含有较多结合水和挥发分,结合水析出活化能在12.31~41.12 kJ/mol,与挥发分析出活化能相近;随着温升速率的增加,3种WIER燃烧过程中结合水析出阶段和挥发分析出阶段重合越多;对比3种WIER的12种反应机理,结合水析出阶段最概然机理函数均为G-B方程,而挥发分析出阶段最概然机理函数对应的方程有所不同。

The combustion mechanism of three kinds of waste ion exchange resins(WIERs) was studied by using thermogravimetric analysis and chemical reaction kinetics. Results showed that the three kinds of WIERs have similar combustion characteristics, while all the WIERs contains more bound water and volatile matter. The activation energy of the bound water release stage is 12.31-41.12 kJ/mol, which is close to that of the volatile matter release stage. With the increase of temperature rise rate, the bound water release stages of the three WIER combustion processes coincide more largely with the volatile matter release stages. Through comparing 12 reaction mechanisms of the three kinds of WIERs, the most generalized mechanism functions of the bound water release stages all are G-B equations, while those of the volatile mater release stages are different.