There is an urgent need to reduce the CO₂ emissions from global shipping. This study developed efficient sea-based CO₂ capture, CO₂ compression and liquefaction for a 3000 kW diesel engine. Several mixed solvents, an intercooler and multiple feeds are used to improve CO₂ removal in the absorber. A square-shape is adopted to reduce space, which is in scarce supply in marine applications. Heat integration is applied to enhance the performance of the stripper. An effective configuration is developed for marine CO₂ capture to improve the absorber, stripper, CO₂ compression and liquefaction. Mono-ethanolamine/piperazine (MEA/PZ) and N-methyl-diethanolamine (MDEA)/PZ increases by 1.7% and 2.8% in terms of CO₂ removal compared to the MEA solution, respectively. The MDEA/PZ process with the intercooler and MDEA/PZ process with multiple feeds achieve 90.6% and 90.5% CO₂ removal, respectively. The configuration using MDEA/PZ as a solvent, and the combined use of the intercooler, multiple feeds and heat integration demonstrate advantages for ship-based carbon capture. The CO₂ removal for the final configuration is 1348 kg/h (94.7%); this is an 8.4% increase compared to the base case. Additionally savings of 100.0%, 18.3%, and 4.0% are achieved in terms of stripper duty, compressor duty in CO₂ compression and CO₂ liquefaction, respectively.

迫切需要减少全球航运的 CO ₂排放。本研究为 3000 kW 柴油发动机开发了高效的海基 CO ₂捕获、CO ₂压缩和液化。几种混合溶剂、一个中间冷却器和多个进料用于改进吸收器中的CO ₂去除。采用方形以减少空间，这在海洋应用中是稀缺的。应用热集成以提高汽提塔的性能。为海洋 CO ₂捕获开发了一种有效的配置，以改进吸收器、汽提塔、CO ₂压缩和液化。与MEA溶液相比，单乙醇胺/哌嗪(MEA/PZ)和N-甲基-二乙醇胺(MDEA)/PZ在CO ₂去除方面分别增加了1.7%和2.8% 。带有中间冷却器的 MDEA/PZ 工艺和带有多个进料的 MDEA/PZ 工艺分别实现了 90.6% 和 90.5% 的 CO ₂去除。使用 MDEA/PZ 作为溶剂的配置以及中间冷却器、多进料和热集成的组合使用证明了船基碳捕获的优势。最终配置的 CO ₂去除量为 1348 kg / h (94.7%)；与基本情况相比，这增加了 8.4%。此外，在汽提塔负荷、CO ₂压缩机负荷方面实现了 100.0%、18.3% 和 4.0% 的额外节省分别是压缩和 CO ₂液化。