Detailed parametric analyses on a post‐combustion carbon dioxide (CO₂) capture system using a hot potassium carbonate solution was completed using a rate‐based simulation study. The system was simulated in Aspen Plus® V10, adopting the electrolyte non‐random two‐liquid property package. A base case study of the system was validated using literature data. Parametric analyses were then performed to study the effect of vital system parameters on CO₂ capture rate and stripper reboiler duty. These system parameters include: (i) reflux ratio of stripping column (ii) lean solvent flowrate (iii) flue gas flowrate (iv) lean solvent concentration (v) lean solvent temperature (vi) flue gas temperature and (vii) absorber operating pressure. Changes in the lean solvent concentration (from 25 to 45 wt%) and absorber operating pressure (from 0.5 to 2.5 MPa) were observed to have the most significant effects on the overall performance of the capture system. Increasing both parameters showed substantial declines in the reboiler duty and resulted in remarkable increases in the corresponding carbon capture levels, and vice versa. The performance of various packing types in the absorber and stripper columns were also studied. Among the packing types examined, Flexipac Koch Metal 1Y was observed to yield the best system performance. The results from the parametric analyses were used to propose an optimised model that was able to improve carbon removal rate by 12.61% and decreased stripper reboiler duty by 14.86%. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.

中文翻译：

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燃煤电厂基于热K2CO3的燃烧后CO2捕集的参数研究和优化

通过基于速率的模拟研究，完成了使用热碳酸钾溶液的燃烧后二氧化碳（CO ₂）捕集系统的详细参数分析。该系统在AspenPlus®V10中进行了仿真，采用了电解质非随机两液特性软件包。使用文献数据验证了该系统的基本案例研究。然后进行参数分析以研究重要系统参数对CO _2的影响捕集率和汽提塔再沸器负荷。这些系统参数包括：（i）汽提塔的回流比（ii）稀溶剂流速（iii）烟气流速（iv）稀溶剂浓度（v）稀溶剂温度（vi）烟气温度和（vii）吸收塔的工作压力。观察到贫溶剂浓度（从25到45 wt％）和吸收塔工作压力（从0.5到2.5 MPa）的变化对捕集系统的整体性能影响最大。两个参数的增加都表明再沸器的负荷大大降低，并导致相应的碳捕集水平显着增加，反之亦然。还研究了吸收塔和汽提塔中各种填料类型的性能。在检查的包装类型中，观察到Flexipac Koch Metal 1Y具有最佳的系统性能。参数分析的结果被用于提出一个优化的模型，该模型能够将碳去除率提高12.61％，汽提塔再沸器负荷降低14.86％。©2020年化学工业协会和John Wiley＆Sons，Ltd.