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Competitive H2S–CO2 absorption in reactive aqueous methyldiethanolamine solution: Prediction with the ePC-SAFT equation of state
Fluid Phase Equilibria ( IF 2.6 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.fluid.2019.112453
Conor Cleeton , Odin Kvam , Riccardo Rea , Lev Sarkisov , Maria Grazia De Angelis

Abstract Reactive absorption of CO2 and H2S in aqueous methyldiethanolamine (MDEA) solutions is considered within the ePC-SAFT equation of state. We demonstrate that ePC-SAFT can be employed in a predictive manner without regression of additional temperature-correlated terms. Mixed system predictions are tested using a consistent set experimental data covering a wide range of temperatures (313 K–413 K), partial pressures (0.001 kPa–1000 kPa), and MDEA mass fractions (0.05– w M D E A 0.75 w M D E A ). Predicted partial pressures for acid gas absorption show good agreement for low MDEA fractions ( w M D E A w M D E A > 0.5), likely originating from underlying assumptions in the Debye-Huckel electrolyte free energy treatment and representation of ionic species.

中文翻译:

反应性甲基二乙醇胺水溶液中的竞争性 H2S-CO2 吸收:用 ePC-SAFT 状态方程预测

摘要 在 ePC-SAFT 状态方程中考虑了 CO2 和 H2S 在甲基二乙醇胺 (MDEA) 水溶液中的反应吸收。我们证明 ePC-SAFT 可以以预测方式使用,而无需回归额外的温度相关项。混合系统预测使用一致的一组实验数据进行测试,这些数据涵盖了广泛的温度 (313 K–413 K)、分压 (0.001 kPa–1000 kPa) 和 MDEA 质量分数 (0.05– w MDEA 0.75 w MDEA )。对于低 MDEA 分数(w MDEA w MDEA > 0.5),酸性气体吸收的预测分压显示出良好的一致性,这可能源于 Debye-Huckel 电解质自由能处理中的基本假设和离子种类的表示。
更新日期:2020-05-01
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