Green, efficient, and low energy consumption capture of CO₂ from the flue gas of coal-fired power plants has been one of the most popular research topics in the world. In this work, a concept process of postcombustion capture (PCC) using a choline chloride/urea (1:2) deep eutectic solvent (DES) as a physical solvent was proposed. The DES-based PCC process is modeled and simulated using commercial Aspen Plus simulation software. The required parameters were studied and further embedded in Aspen Plus. The simulation results show that the process has a good capture effect; the capture ratio of CO₂ is 97.33%, and the purity of CO₂ in the product gas is 99.42%. Through sensitivity analysis, the influence of several key parameters on the process performance is studied and reasonable operating conditions are determined. Exergy analysis is carried out for a CO₂ absorption unit and a solvent regeneration unit. The results show that the total exergy efficiency of these two units is 74.28%. The new DES-based PCC process has great potential and will provide a new way to capture CO₂ in the flue gas of coal-fired power plants.

中文翻译：

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使用绿色深共晶溶剂的燃煤电厂烟气中CO _2的新型燃烧后捕集工艺

从燃煤电厂的烟气中绿色，高效，低能耗地捕获CO ₂一直是世界上最受欢迎的研究主题之一。在这项工作中，提出了使用氯化胆碱/尿素（1：2）深共熔溶剂（DES）作为物理溶剂的燃烧后捕集（PCC）的概念过程。使用商用Aspen Plus仿真软件对基于DES的PCC过程进行建模和仿真。研究了所需的参数，并将其进一步嵌入Aspen Plus中。仿真结果表明该过程具有良好的捕获效果。CO ₂的捕获率为97.33％，CO ₂的纯度产物气中的99.42％。通过敏感性分析，研究了几个关键参数对工艺性能的影响，并确定了合理的工作条件。对CO ₂吸收单元和溶剂再生单元进行了本能分析。结果表明，这两个单元的总火用效率为74.28％。基于DES的新型PCC工艺具有巨大的潜力，它将为捕获燃煤电厂烟道气中的CO ₂提供一种新方法。