Abstract Levulinic acid and its esters are considered very versatile chemical compounds used for a wide range of derivatives. Traditionally ethyl levulinate is synthesized in batch reactors, using homogeneous catalysts (H2SO4, H3PO4). Several investigations were reported on solid acid catalysts, as zeolites, sulfated oxides, sulfonic ion-exchange resins. Amberlyst-15 showed high potentials: to design a continuous reactor, it is necessary to investigate the stability of the catalyst and the kinetics of the reaction. In the present work, we demonstrated that the resin is stable for more than 5 days. Kinetic and mass transfer phenomena were studied, evaluating the partition and take-up of the used resin when put in contact with reactants and products. Two different samples of Amberlyst-15 were used, characterized by different size, demonstrating that bigger particles lead to higher intraparticle diffusion limitations.

中文翻译：

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确定 Amberlyst-15 促进的乙酰丙酸乙酯合成的内在动力学的粒子内扩散模型

摘要乙酰丙酸及其酯被认为是用途广泛的化合物，可用于多种衍生物。传统上乙酰丙酸乙酯是在间歇反应器中合成的，使用均相催化剂（H2SO4、H3PO4）。一些关于固体酸催化剂的研究报告，如沸石、硫酸化氧化物、磺酸离子交换树脂。Amberlyst-15 显示出高潜力：要设计连续反应器，必须研究催化剂的稳定性和反应动力学。在目前的工作中，我们证明了树脂的稳定性超过 5 天。研究了动力学和传质现象，评估了使用过的树脂与反应物和产物接触时的分配和吸收。使用了两种不同的 Amberlyst-15 样品，其特点是尺寸不同，