A capacitive deionization (CDI) device was proposed for NH₃-based CO₂ absorption-desorption process, to reduce the stripper regeneration energy. A rate-based model, RateFrac, was developed for the absorber, along with an equilibrium-based model, RadFrac, for the stripper. The model was verified, and the results have shown good agreement with experimental data. The CO₂ capture process, which is integrated with CDI, was simulated and compared with a non-CDI CO₂ capture process based on regeneration energy. Operating parameters such as flow rate, lean CO₂ loading, and ammonia concentration in the lean solvent were used to analyze the integrated model. Stripper regeneration energy can be reduced by as much as 37.5% by using the CDI setup. Moreover, energy cost estimation was performed using two heat sources (natural gas and coal). CDI saved a maximum of 31% of the energy costs for a natural gas–fired boiler and 12.3% of the energy costs for a coal-based boiler.

提出了一种基于NH ₃的CO ₂吸收-解吸过程的电容式去离子（CDI）装置，以减少汽提塔的再生能量。针对吸收塔开发了基于速率的模型RateFrac，针对汽提塔开发了基于平衡的模型RadFrac。对该模型进行了验证，结果与实验数据吻合良好。模拟了与CDI集成的CO ₂捕获过程，并将其与基于再生能量的非CDI CO ₂捕获过程进行了比较。流量，稀薄CO ₂等运行参数负载和稀溶剂中的氨浓度用于分析集成模型。通过使用CDI设置，汽提塔的再生能量最多可降低37.5％。此外，使用两种热源（天然气和煤炭）进行能源成本估算。CDI最多可为天然气锅炉节省31％的能源成本，而为燃煤锅炉最多可节省12.3％的能源成本。