关键词: 散货船, 脱碳, 替代燃料, 碳捕获, 经济性

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