Postcombustion CO₂ separation using aqueous amine solution has a great potential to minimize CO₂ emissions but is expensive due to huge energy requirement for solvent regeneration. Several structural modifications can be implemented to minimize the regeneration energy requirement and optimize the energy efficiency. In this study, we evaluated the techno‐economic benefits of three stripping modifications, namely lean vapor compression (LVC), stripper overhead exchanger (SOE), and an advanced hybrid configuration (LVCSOE) in a single flowsheet aimed at reducing the energy consumption of CO₂ separation process using 30 wt.% monoethanolamine (MEA) solution. All the configurations were simulated using Aspen Plus^® rate‐based modeling, while capital investment was evaluated using Aspen Economic Analyzer^®. All the modifications reduced the energy consumption and showed economic benefit compared to the base case. The optimal configuration was LVCSOE, which reduced the energy requirement for solvent regeneration and the CO₂ capture cost by 18% and 5.3%, respectively, and can save 5.4 million USD annually. Additionally, sensitivity analysis of economic variables suggested that CO₂ capture cost is more sensitive to regeneration steam cost than any other economic parameter. Furthermore, the effect of regeneration steam cost revealed that the implementation of an advanced process configuration can result in higher net savings as compared to the base case at high fuel price. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.

中文翻译：

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燃烧后二氧化碳捕集工艺的改进：技术经济分析

使用胺水溶液的燃烧后CO ₂分离具有使CO ₂排放最小化的巨大潜力，但由于溶剂再生需要大量能量，因此成本很高。可以实施几种结构上的修改以最小化再生能量需求并优化能量效率。在这项研究中，我们在单一流程图中评估了三种汽提改型的技术经济效益，分别是稀蒸汽压缩（LVC），汽提塔顶交换器（SOE）和高级混合配置（LVCSOE），旨在降低三氯甲烷的能源消耗。使用30 wt。％的单乙醇胺（MEA）溶液进行CO ₂分离过程。所有的配置均使用Aspen Plus制模拟^®基于速率的造型，而资本投入使用阿斯经济分析评估^®。与基本情况相比，所有修改均降低了能耗并显示出经济效益。最佳配置为LVCSOE，可将溶剂再生的能源需求和CO ₂捕集成本分别降低18％和5.3％，每年可节省540万美元。此外，对经济变量的敏感性分析表明，CO ₂与任何其他经济参数相比，捕集成本对再生蒸汽成本更为敏感。此外，再生蒸汽成本的影响表明，与采用高燃料价格的基本情况相比，采用先进的工艺配置可以带来更高的净节省。©2020年化学工业协会和John Wiley＆Sons，Ltd.