Abstract Water as an absorbent for ethylene oxide has been extensively investigated over the past decades, but many issues about this system still remain such as solvent loss, high energy consumption. In this work, a new absorbent ethylene carbonate (EC) was applied and the solubility behaviors of carbon dioxide, ethylene, methane in the ethylene carbonate (EC) were investigated with using static apparatus at temperatures of 313.2, 323.2, and 333.2 K. And the vapor liquid equilibrium(VLE) of ethylene oxide(EO) and EC have been studied with gas chromatography analysis method at temperatures of 333.2, 343.2, and 353.2 K. The NRTL and Wilson models were used to correlate experimental solubility data and VLE data. The conceptual H2O-based and EC-based EO absorption process for EO-containing mixed gas purification was established and optimized with using the regressed NRTL model parameters. The results showed that the purification process of EC used as absorbent could reduce energy consumption 37.6 GJ/h.

中文翻译：

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环氧乙烷吸收的实验、建模和过程模拟研究

摘要 在过去的几十年中，水作为环氧乙烷的吸收剂得到了广泛的研究，但该系统的许多问题仍然存在，例如溶剂损失、高能耗。在这项工作中，应用了一种新的吸收剂碳酸亚乙酯 (EC)，并使用静态设备在 313.2、323.2 和 333.2 K 的温度下研究了二氧化碳、乙烯、甲烷在碳酸亚乙酯 (EC) 中的溶解行为。和使用气相色谱分析方法在 333.2、343.2 和 353.2 K 温度下研究了环氧乙烷 (EO) 和 EC 的气液平衡 (VLE)。NRTL 和 Wilson 模型用于关联实验溶解度数据和 VLE 数据。使用回归的NRTL模型参数建立并优化了用于含EO混合气体净化的概念性H2O和EC基EO吸收工艺。结果表明，EC作为吸收剂的纯化过程可降低能耗37.6 GJ/h。