Drying as a simultaneous heat and mass transfer process can be modeled via the reaction engineering approach (REA) where the apparent activation energy of the material is established and related to its moisture content during drying. This relationship is unique as the normalized activation energies can be collapsed into a single equation irrespective of the drying conditions and dryer types. Here, REA was applied to model the drying kinetics of sawdust using convective hot air in a laboratory setup. The normalized (relative) activation energy curve generated from one drying experiment was employed to predict the drying kinetics and temperature profiles. The REA can describe well the convective drying kinetics of sawdust, and major physics of the drying process was captured well with this technique.

中文翻译：

---

木屑对流干燥的反应工程模型

可以通过反应工程方法（REA）对作为同步传热传质过程的干燥进行建模，在该方法中，可以确定材料的表观活化能，并与干燥过程中的水分含量相关。这种关系是独特的，因为归一化的活化能可以分解为一个方程式，而与干燥条件和干燥器类型无关。在这里，在实验室设置中，使用对流热空气将REA用于模拟木屑的干燥动力学。从一个干燥实验中生成的归一化（相对）活化能曲线用于预测干燥动力学和温度曲线。REA可以很好地描述木屑的对流干燥动力学，并利用该技术很好地捕捉了干燥过程的主要物理原理。