Abstract

Process modeling and design of the ethylene oxide production plant is mainly depended on the kinetics of the ethylene oxide production reactions. In this article, the kinetics equations for partial oxidation (epoxidation) of ethylene on silver catalyst were reviewed. There are three competitive reactions in this system: ethylene partial and total oxidation and ethylene oxide total oxidation. The reaction rate equations for these three reactions were compared and advantage and the disadvantage of kinetic models were discussed. Dichloroethane (DCE) is used in these reactions to increase the ethylene oxide selectivity. Therefore, the kinetics of the reactions considering the role of DCE is also reported. Most of the kinetics models have some weaknesses. However, one of the reviewed models was the complete model because of including all three reactions of partial and total oxidation of ethylene and total oxidation of ethylene oxide. Also, this model considered the concentration of selectivity promoter (DCE) and reverse reactions.

中文翻译：

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银催化剂上环氧乙烷生产的动力学模型：综述

摘要

环氧乙烷生产装置的工艺建模和设计主要取决于环氧乙烷生产反应的动力学。本文综述了在银催化剂上乙烯部分氧化（环氧化）的动力学方程。该系统中存在三个竞争性反应：乙烯部分氧化和全部氧化以及环氧乙烷完全氧化。比较了这三个反应的反应速率方程，讨论了动力学模型的优缺点。在这些反应中使用二氯乙烷（DCE）来提高环氧乙烷的选择性。因此，还报道了考虑DCE作用的反应动力学。大多数动力学模型都有一些缺点。然而，审查的模型之一是完整模型，因为它包括乙烯的部分和全部氧化和环氧乙烷的全部氧化的所有三个反应。此外，该模型考虑了选择性促进剂（DCE）的浓度和逆反应。