Abstract In this work, to obtain optimal process conditions in a CO2 capturing plant, novel equipment modifications are made to achieve the desired product specification in the small and large pilot plants with low and high pressures. For this purpose, results from two different CO2 capturing pilot plants are compared at different process variables, using the different concentration of aqueous MEA (25, 28, 30, 33) wt.% and within the temperature range of 50 ∼ 77°C in the absorber and 100 ∼120°C in desorber. We used the generalized Patel-Teja-Valderrama (PTV) EoS, Peng-Robinson (PR) EoS, and Soave-Redlich-Kwong (SRK) equation of state through a MATLAB code and Aspen Plus default with the NRTL model. Moreover, critical properties for MEA solutions are estimated based on Valderrama et al. approach. The correlation relation of the PTV EoS was used for the calculation of MEA liquid density data for rich and lean Mono-Ethanol Amine (MEA) solution in the CO2 capturing pilot plants. Comprehensive studies were carried out to investigate the validity of the present predictions provided by the experimental results' implementation. Finally, with proper process modification, the predicted liquid density values by Patel-Teja-Valderrama (PTV) EoS were achieved with an average absolute deviation (AAD %) of about 0.12 ∼ 0.23 in different temperature profiles in absorber section and 0.14 ∼ 0.26 in desorber sections for both pilot plants. In the present work, the results of Patel-Teja-Valderrama EoS in the present simulation model were in good agreement with the experimental data.

中文翻译：

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使用广义 Patel-Teja-Valderrama 状态方程进行实验和建模，用于计算 CO2 捕获试验工厂中的单乙醇胺 (MEA) 溶液密度

摘要 在这项工作中，为了在 CO2 捕集装置中获得最佳工艺条件，对小型和大型低压和高压中试装置进行了新颖的设备改造以达到所需的产品规格。为此，使用不同浓度的含水 MEA（25、28、30、33）wt.% 和在 50 ∼ 77°C 的温度范围内，在不同的工艺变量下比较两个不同的 CO2 捕获试验工厂的结果。吸收器和解吸器中 100 ～ 120°C。我们通过 MATLAB 代码和 Aspen Plus 默认的 NRTL 模型使用了广义 Patel-Teja-Valderrama (PTV) EoS、Peng-Robinson (PR) EoS 和 Soave-Redlich-Kwong (SRK) 状态方程。此外，MEA 解决方案的关键特性是根据 Valderrama 等人估计的。方法。PTV EoS 的相关关系用于计算 CO2 捕获中试工厂中富和贫单乙醇胺 (MEA) 溶液的 MEA 液体密度数据。进行了全面的研究，以调查由实验结果的实施提供的当前预测的有效性。最后，通过适当的工艺修改，Patel-Teja-Valderrama (PTV) EoS 预测的液体密度值在吸收器部分的不同温度分布中达到约 0.12 ∼ 0.23 和 0.14 ∼ 0.26 英寸的平均绝对偏差 (AAD %)。两个中试装置的解吸器部分。在目前的工作中，Patel-Teja-Valderrama EoS 在本仿真模型中的结果与实验数据非常吻合。