锡林浩特褐煤提质同步热分析动力学分析

为研究褐煤提质过程中的现象和规律，本文测定了流动气氛中，锡林浩特褐煤提质过程的非等温热重分析-差示扫描量热法（TG-DSC）同步热分析数据。将无模型法（Friedman法）与多重扫描速率法（升温速率分别为5、10、15、20、25和30K/min）结合，得出不同粒径（74~104μm、104~124μm和124~178μm）下测试样品提质过程的质量动力学模型与热动力学模型。综合两种模型可以发现，粒径越小，质量行为与热行为越一致，并且机理函数模型E1:α、B1:α(1-α)和D1:1/2α适合描述锡林浩特褐煤的提质过程。

Synchronous thermal analysis kinetics of Xilinhot lignite

In order to study the upgrading of Xilinhot lignite, we measured several groups of synchronous thermal analysis data for Xilinhot lignite upgrading under Ar by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). Combining the model free conversion method(Friedman method) with the multiple scanning rate method(with heating rates of 5, 10, 15, 20, 25 and 30K/min), we obtained a mass dynamic model and a thermodynamic model for different particle sizes(74-104μm, 104-124μm, 124-178μm). The study found that the mass change rules are closer to the thermal change rules when the particle size is small. The results show that E1:α, B1:α(1-α)and D1:1/2α are the best mechanism functions to fit the upgrading of Xilinhot lignite. 