CO₂ physical absorption process is typically operated at a low temperature as low as -40^oC and high pressure. In this study, nanoabsorbents are applied to increase the operating temperature by improving the absorption performance. Herein, CO₂ absorption performance is analyzed in a column absorber based on the Eulerian-Eulerian and population balance models. The computational results are verified experimentally under the same conditions and flow regimes can be classified into two regions in terms of the Reynolds numbers of the CO₂ gas and absorbent. Dimensionless correlations are developed to predict the CO₂ mass transfer coefficient for each region, which can be scaled up for industrial applications of the nanoabsorbents. The input power of the CO₂ absorption system is calculated by considering each component. Finally, an operational map of the CO₂ absorption and regeneration system, including both CO₂ mass transfer coefficient and the input power, is presented. The operational map will be a guideline to optimize operating conditions. Specifically, when the CO₂ absorption/regeneration industrial system is optimally designed, energy consumption can be reduced by approximately 40.5% with the CO₂ mass transfer coefficient of 0.475 m/s. When SiO₂/MeOH nanoabsorbents are used as a working fluid of CO₂ absorption system, the operational energy can be additionally saved by 23.2%. In addition, CO₂ mass transfer coefficient can be improved by 11.9% using nanoabsorbents for same Reynolds number. It is expected that the energy consumption in the industrial MeOH-based CO₂ absorption system will be greatly reduced by using the nanoabsorbents and the present optimization methods.

CO ₂物理吸收过程通常在低至-40 ^o C的低温和高压下运行。在这项研究中，纳米吸收剂被用于通过改善吸收性能来提高工作温度。在此，基于欧拉-欧拉和人口平衡模型在柱吸收器中分析CO ₂吸收性能。计算结果在相同条件下进行了实验验证，根据CO ₂气体和吸收剂的雷诺数，可将流动方式分为两个区域。开发了无量纲相关性以预测CO ₂每个区域的传质系数，可以按比例放大以用于纳米吸收剂的工业应用。通过考虑各个成分来计算CO ₂吸收系统的输入功率。最后，给出了CO ₂吸收和再生系统的运行图，包括CO ₂传质系数和输入功率。操作图将是优化操作条件的指南。具体地，当优化设计CO ₂吸收/再生工业系统时，可以以0.475m / s的CO ₂传质系数将能量消耗降低约40.5％。当SiO ₂/ MeOH纳米吸收剂用作CO ₂吸收系统的工作流体，可另外节省23.2％的运行能量。另外，使用相同雷诺数的纳米吸收剂可以将CO ₂传质系数提高11.9％。预期通过使用纳米吸收剂和本发明的优化方法，将大大降低工业上基于MeOH的CO ₂吸收系统中的能量消耗。