The rate-based model for distillation computes mass and heat transfer rates, allowing better predictions of the performance of the columns. Nevertheless, one of the fundamental issues with the rate-based model is the necessity of reliable mass transfer models, which may vary in terms of the kind of mixture and the trays/packing geometry. In this work, a mass transfer model is proposed to represent the separation of a methanol/ethanol mixture in the trays of a batch column. The model assumes a bubbling regime. The mass transfer model is incorporated to the rate-based model of the column, obtaining the composition and temperature profiles along the column. The model is validated with experimental data. The results indicate that rate-based model with the mass transfer model has a reduction of 3.5% in the error of the compositions profile compared with the equilibrium model.

基于速率的蒸馏模型计算质量和传热速率，从而可以更好地预测塔的性能。然而，基于速率的模型的基本问题之一是需要可靠的传质模型，该模型在混合物种类和塔盘/填料几何形状方面可能会有所不同。在这项工作中，提出了一种传质模型来代表分批塔板塔盘中甲醇/乙醇混合物的分离。该模型假定冒泡状态。将传质模型合并到色谱柱的基于速率的模型中，获得沿色谱柱的组成和温度曲线。该模型已通过实验数据验证。结果表明，基于速率的模型与传质模型的比值减少了3。