Abstract The mean surface temperature has increased considerably over the past few decades primarily due to the huge contribution of CO2, a greenhouse gas. Hence, the reduction of CO2 majorly from the point sources of emission has been a thrust domain of research. This work reports the measurements and modeling of CO2 solubility in newly proposed aqueous solvent blends of 1-butyl-3-methyl-imidazolium acetate ([bmim] [Ac]) and amine activators. Various amine activators viz. 1-(2-aminoethyl) piperazine (AEP) and bis (3-aminopropyl) amine (APA) have been employed in aqueous [bmim] [Ac] over the wide operating temperature and CO2 partial pressure range of (303.15˗323.15) K and (1–390) kPa, respectively. Along with this, qualitative 13C NMR and FTIR analysis have been also performed to assess the proposed reaction scheme. The experimental vapor liquid equilibrium data (VLE) were modeled by modified Kent-Eisenberg equilibrium model including the gas phase non-ideality and Feed forward neural network model. The equilibrium constants associated with [bmim] [Ac], AEP and APA deprotonation, and carbamate formation reactions are regressed to fit the experimental CO2 solubility data. Various important thermophysical properties such as surface tension, viscosity, sound velocity, refractive index and density have also been measured and correlated using established as well as newly proposed models.

中文翻译：

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胺活化咪唑鎓离子液体溶剂中 CO2 气液平衡的测量和建模

摘要 在过去的几十年中，平均地表温度显着升高，这主要是由于温室气体 CO2 的巨大贡献。因此，主要来自点排放源的二氧化碳的减少一直是研究的重点领域。这项工作报告了新提出的 1-丁基-3-甲基-咪唑鎓醋酸盐 ([bmim] [Ac]) 和胺活化剂的水性溶剂混合物中 CO2 溶解度的测量和建模。各种胺活化剂即。1-(2-氨基乙基)哌嗪 (AEP) 和双 (3-氨基丙基) 胺 (APA) 已用于 [bmim] [Ac] 水溶液中，工作温度和 CO2 分压范围很宽，为 (303.15˗323.15) K和 (1–390) kPa，分别。与此同时，还进行了定性 13C NMR 和 FTIR 分析，以评估所提出的反应方案。实验汽液平衡数据（VLE）由修正的 Kent-Eisenberg 平衡模型建模，包括气相非理想和前馈神经网络模型。对与 [bmim] [Ac]、AEP 和 APA 去质子化以及氨基甲酸酯形成反应相关的平衡常数进行回归，以拟合实验 CO2 溶解度数据。各种重要的热物理特性，如表面张力、粘度、声速、折射率和密度，也已使用已建立的和新提出的模型进行测量和关联。和氨基甲酸酯形成反应进行回归以拟合实验 CO2 溶解度数据。各种重要的热物理特性，如表面张力、粘度、声速、折射率和密度，也已使用已建立的和新提出的模型进行测量和关联。和氨基甲酸酯形成反应进行回归以拟合实验 CO2 溶解度数据。各种重要的热物理特性，如表面张力、粘度、声速、折射率和密度，也已使用已建立的和新提出的模型进行测量和关联。