It is evident from several researches that combining a couple of process modifications is effective in reducing reboiler duty in the chemical absorption‐based carbon capture process. Although extensive works on these combined modifications exist in literature, studies on combined lean vapour compression (LVC) and rich solvent preheating (RSP) are unavailable, despite their potentials as promising energy‐saving technologies. This simulation‐based study therefore explored standalone and combined process modifications capable of minimizing reboiler duty in monoethanolamine (MEA)‐based postcombustion CO₂ capture system. Using the electrolyte nonrandom two‐liquid (ELECNRTL) property method in Aspen Plus®, a rigorous rate‐based simulation was performed and validated for conventional MEA‐based capture system. Subsequently, three main process modifications, namely, LVC, RSP and combined LVC and RSP, were investigated to evaluate their impact on energy consumption level in the stripping column. The modifications were able to reduce the total equivalent electrical penalty on the power plant by 12.94%, 5.24% and 14.48%, respectively. The results from this study demonstrate that a detailed optimization of the combined LVC and RSP process configuration could achieve considerable energy saving in MEA‐based capture systems.

中文翻译：

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单乙醇胺基二氧化碳捕集系统的节能工艺配置

从几项研究中可以明显看出，将几种工艺改进相结合可有效降低基于化学吸收的碳捕集工艺中的再沸器负荷。尽管文献中对这些组合修饰进行了广泛的研究，但尚无关于稀薄蒸汽压缩（LVC）和浓溶剂预热（RSP）组合的研究，尽管它们有潜力成为有前途的节能技术。因此，基于模拟的研究探索了独立的和组合的过程修改方法，该方法能够最大程度地减少基于单乙醇胺（MEA）的燃烧后CO _2的再沸器负荷。捕获系统。使用AspenPlus®中的电解质非随机二液（ELECNRTL）特性方法，进行了严格的基于速率的模拟，并针对常规的基于MEA的捕获系统进行了验证。随后，研究了LVC，RSP以及LVC和RSP组合的三个主要工艺改进，以评估其对汽提塔能耗水平的影响。这些修改能够分别将电厂的等效电力总损失降低12.94％，5.24％和14.48％。这项研究的结果表明，对LVC和RSP组合工艺配置进行详细的优化可以在基于MEA的捕获系统中实现可观的节能。