It is widely accepted that emissions of CO₂, which is a major greenhouse gas, are the primary cause of climate change. This has led to the development of carbon capture and storage (CCS) technologies in which CO₂ is captured from large-scale point sources such as power plants. However, retrofits of carbon capture plants result in high efficiency penalties, which have been reported to fall in the range of 7–12% points in the case of post-combustion capture from natural gas-fired power plants. Therefore, a reduction of these efficiency losses is a high priority in order to deploy CCS at a large scale. At the moment, chemical solvent scrubbing using amines, such as monoethanolamine (MEA), is considered as the most mature option for CO₂ capture from fossil fuel-fired power plants. However, due to high heat requirements for solvent regeneration, and thus high associated efficiency penalties, the use of alternative solvents has been considered to reduce the energy demand. In this study, a techno-economic assessment of the post-combustion CO₂ capture process using 2-amino-2-methyl-1-propanol (AMP) for decarbonisation of a natural gas combined cycle (NGCC) power plant was performed. The thermodynamic assessment revealed that the AMP-based process resulted in 25.6% lower reboiler duty compared to that of the MEA-based process. This was primarily because the AMP solvent can be regenerated at a higher temperature (140 °C) and pressure (3.5 bar) compared to that of MEA (120 °C and 1.8 bar). Furthermore, the efficiency penalty due to the retrofit of the AMP-based process with the natural gas combined cycle power plant was estimated to be 7.1% points, compared to 9.1% points in the case of integration with the MEA-based process. Regardless of the superior thermodynamic performance, the economic performance of the AMP-based process was shown to be better than that of the MEA-based process only for make-up rates below 0.03%. Therefore, use of AMP as a solvent in chemical solvent scrubbing may not be the most feasible option from the economic standpoint, even though it can significantly reduce the efficiency penalty associated with CO₂ capture from NGCCs.

作为主要温室气体的CO _2的排放是引起气候变化的主要原因，这一点已被广泛接受。这导致了碳捕集与封存（CCS）技术的发展，在这种技术中，从发电厂等大型点源中捕获了CO ₂。但是，对碳捕集装置进行改造会导致高效率的罚款，据报道，在从天然气发电厂进行燃烧后捕集的情况下，碳排放的罚款范围为7-12％。因此，降低这些效率损失是大规模部署CCS的当务之急。目前，使用胺（例如单乙醇胺（MEA））进行化学溶剂洗涤被认为是CO ₂最成熟的选择从化石燃料发电厂捕获。但是，由于溶剂再生需要很高的热量，因此也伴随着很高的效率损失，因此已考虑使用替代溶剂来减少能源需求。在这项研究中，燃烧后CO ₂的技术经济评估使用2-氨基-2-甲基-1-丙醇（AMP）进行天然气联合循环（NGCC）电厂脱碳的捕集过程。热力学评估表明，与基于MEA的工艺相比，基于AMP的工艺可使再沸器负荷降低25.6％。这主要是因为与MEA（120°C和1.8 bar）相比，AMP溶剂可以在更高的温度（140°C）和压力（3.5 bar）下再生。此外，由于使用天然气联合循环发电厂对基于AMP的过程进行改造而导致的效率损失估计为7.1％，而与基于MEA的过程集成的情况下为9.1％。不管卓越的热力学性能，仅在补足率低于0.03％的情况下，基于AMP的工艺的经济性能显示出比基于MEA的工艺更好。因此，从经济的角度来看，使用AMP作为化学溶剂洗涤中的溶剂可能不是最可行的选择，即使它可以显着降低与CO相关的效率损失₂从NGCC捕获。