This paper discusses the possibility to reduce the energy efficiency design index for ships through a post-combustion carbon capture process. The post-combustion carbon capture process, successfully implemented in the electricity generation sector, allows reduction of CO₂ emissions of existing units using fossil fuels with relative simplicity. An assessment of implementing an amine-based carbon capture system onboard of the ship is presented. The analysis covers the energy requirements of the entire system including SO₂ removal, carbon capture and CO₂ compression. Simulations, conducted for different ambient conditions, revealed that the highest CO₂ emission, translating into a reduction of the EEDI, is possible in tropical conditions. The energy efficiency reduction is possible also in arctic conditions to a lesser extent. The post-combustion carbon capture process seems to be a promising technology as the method to reduce the EEDI for ships. An additional advantage is the possibility to retrofit existing constructions as the implementation requires no significant changes in the ship propulsion system. Finally, the nature of the amine-based carbon capture process, aimed to remove acidic exhaust gas components, supports SO₂ emission reduction, making the exhaust gas practically sulfur-free.

本文讨论了通过燃烧后碳捕集过程降低船舶能效设计指标的可能性。燃烧后的碳捕集过程已成功地在发电部门实施，可以相对简单地减少使用化石燃料的现有机组的CO ₂排放。提出了在船上实施基于胺的碳捕集系统的评估。该分析涵盖了整个系统的能源需求，包括去除SO ₂，碳捕获和CO ₂压缩。针对不同的环境条件进行的模拟表明，最高的CO ₂在热带条件下有可能排放，转化为EEDI的减少。在北极条件下也可以较小程度地降低能量效率。燃烧后碳捕集工艺作为减少船舶EEDI的方法似乎是一项很有前途的技术。另一个优点是可以对现有结构进行改造，因为实施不需要对船舶推进系统进行重大更改。最后，旨在去除酸性废气成分的胺基碳捕集工艺的性质有助于减少SO ₂排放，使废气几乎不含硫。