Developing innovative, energy-efficient technologies to capture CO₂ from marine emissions and convert it represents an effective way to move toward a circular approach to reduce CO₂ emissions. Additionally, SO₂ removal, as a short-term interim solution for the current maritime sector, allows the use of less desulfurized/expensive fuels to meet International Maritime Organization emission standards. In this context, we investigated an integrated process of capturing CO₂/SO₂ onboard ships and converting captured CO₂, thus initiating a process close to carbon neutrality. CO₂ absorption by monoethanolamine and SO₂ scrubbing with seawater were envisaged in packed-bed columns, whose hydrodynamics and performance were analyzed under vertical, inclined, and rolling conditions using three-dimensional (3D) Eulerian models to understand their behavior under changing ocean states. CO₂ conversion via an integrated process combining a sorption-enhanced reverse water gas shift and sorption-enhanced methanol synthesis was proposed. By including a reverse water gas shift and in situ H₂O removal, CO and methanol yields were significantly improved.

中文翻译：

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通过二氧化碳捕集/化学转化和二氧化硫海水洗涤减少船舶废气排放的模型

开发创新、节能的技术来捕获海洋排放中的 CO ₂并将其转化，是迈向循环方法以减少 CO ₂排放的有效途径。此外，SO ₂去除作为当前海事部门的短期临时解决方案，允许使用脱硫较少/昂贵的燃料来满足国际海事组织的排放标准。在此背景下，我们研究了捕获船上CO ₂ /SO _{2并转化捕获的CO 2}的集成过程，从而启动了接近碳中和的过程。设想在填充床塔中用单乙醇胺吸收CO _{2并用海水洗涤 SO 2}，​​并使用三维 (3D) 欧拉模型分析其在垂直、倾斜和滚动条件下的流体动力学和性能，以了解其在变化的海洋状态下的行为。提出了通过结合吸附增强反向水煤气变换和吸附增强甲醇合成的集成工艺来转化CO ₂ 。通过反向水煤气变换和原位H ₂ O 去除，CO 和甲醇产率显着提高。