Abstract: The bulk carrier with low additional value is difficult to choose the decarbonization path due to the cost control. The current study qualitatively analyzes the applicability of carbon capture system on the bulk carrier, and quantitatively analyzes the applicability of alternative fuel, such as biodiesel, LNG, grey methanol, green methanol, green ammonia, on the bulk carrier. The carbon capture system is not suitable for the bulk carrier, because it has problems such as the high energy consumption for capture, the CO₂ storage tanks occupying the cargo tank volume, and the captured CO₂ that is difficult to handle. The preliminary economy calculation of the alternative fuel is relatively poor due to the high cost and the capacity loss of the cargo tank that was caused by the low volume energy density. Considering that the use of the conventional fuel may face carbon tax, the green ammonia powered ship has certain advantages when the carbon tax is above 439 dollars/t, and the green methanol has application advantages when the carbon tax is above 692 dollars/t.

Key words: bulk carrier, decarbonization, alternative fuel, carbon capture, economy

摘要： 具有低附加值特性的散货船出于控制成本原因,在脱碳路径上较难抉择。该文定性分析了碳捕获系统在散货船上的适用性,定量分析了生物柴油、液化天然气、灰甲醇、绿甲醇和绿氨等替代燃料在散货船上的适用性。碳捕获系统存在捕获能耗大、二氧化碳储罐占据货舱体积多、捕获而得的二氧化碳难以处理以及应用于散货船的适用性较差等问题。替代燃料由于较高的燃料费用、较低的体积能量密度导致的货舱舱容损失等原因,初步测算经济性相对较差,考虑到采用常规燃油可能面临配合碳税支出,当碳税在439美元/t以上时,绿氨动力船有一定优势;当碳税在692美元/t以上时,绿甲醇具备应用优势。

关键词: 散货船, 脱碳, 替代燃料, 碳捕获, 经济性