Abstract

The production of sulfonated resins is of great interest to be applied in different industrial processes such as esterification, etherification, biodiesel production and water treatment. Mathematical models play an important role in process control and optimization, through prediction of process variables and adjustment of parameters. Currently mathematical models for resin sulfonation processes are still scarce in literature. In the present study, mathematical tools were used to build a model that is able to describe the sulfonation process of poly[styrene-co-(ethylene glycol dimethacrylate)] particles. The diffusion and rate coefficients were estimated through comparison between the model and the experimental data and presented coherent values. An average activation energy of 170 kJ/mol was obtained for the sulfonation reaction. The results revealed that, for the conditions studied herein, the process is diffusion-controlled and can be represented by the shrinking core model, considering irreversible pseudo-first order reaction for sulfuric acid.

中文翻译：

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聚[苯乙烯-共-（乙二醇二甲基丙烯酸酯）]磺化反应的数学模型

摘要

磺化树脂的生产引起了极大的兴趣，可用于不同的工业过程，例如酯化，醚化，生物柴油生产和水处理。通过预测过程变量和调整参数，数学模型在过程控制和优化中起着重要作用。目前，文献中仍缺乏用于树脂磺化过程的数学模型。在本研究中，使用数学工具建立了一个模型，该模型能够描述聚[苯乙烯-共-（乙二醇二甲基丙烯酸乙二醇酯）]颗粒的磺化过程。通过比较模型和实验数据估算扩散系数和速率系数，并给出相干值。磺化反应获得的平均活化能为170 kJ / mol。