Post-combustion ${\mathrm{CO}}_2$ capture is an effective solution for reducing ${\mathrm{CO}}_2$ emissions. Ionic liquids (ILs) have been proposed as a promising class of absorbents for ${\mathrm{CO}}_2$ capture due to their superior physicochemical properties. As ILs are expected to be, at least initially, costlier than conventional amine solvents, the economic impact of thermal degradation can be more significant for IL-based processes than for conventional systems. In this work, we introduce an advanced IL-based carbon capture process design using a thin-film unit under vacuum to regenerate the solvent. Using this new configuration, the regeneration system can operate at lower temperatures and the solvent residence time can be significantly reduced, minimizing IL absorbent losses due to thermal degradation. We conduct a detailed, rate-based analysis of the impact of thermal degradation kinetics on the economic performance of the proposed process. A comparison to a conventional flowsheet configuration is also presented.

燃烧后 ${\mathrm{二氧化碳}}_2$ 捕获是减少的有效解决方案 ${\mathrm{二氧化碳}}_2$排放。离子液体 (IL) 已被提议作为一类有前途的吸收剂，用于${\mathrm{二氧化碳}}_2$由于其优异的物理化学性质而被捕获。由于 IL 预计至少在最初阶段比传统胺溶剂更昂贵，因此热降解对基于 IL 的工艺的经济影响可能比传统系统更显着。在这项工作中，我们引入了一种先进的基于 IL 的碳捕获工艺设计，使用真空下的薄膜单元来再生溶剂。使用这种新配置，再生系统可以在较低温度下运行，并且溶剂停留时间可以显着减少，从而最大限度地减少热降解导致的 IL 吸收剂损失。我们对热降解动力学对拟议工艺的经济性能的影响进行了详细的、基于速率的分析。还介绍了与传统流程配置的比较。