Combustion of Future Marine Fuels

抄録

To reduce SOx emission, it has been decided that a global cap for sulfur % of marine fuel, which limits the sulfur content of all marine fuel to within 0.5%, starts from 2020. Subsequently, conventional heavy fuel oil (HFO) will not be used for any ship that has not been fitted with an exhaust gas SOx scrubber.

On the EEDI or CO₂ emission from ships, reduction by 20% for the newly built ships after 2020 must be implemented. The subject of energy-saving vessel and engine designs is currently being discussed and researched by various organizations representing government and industry. For example, the conversion of marine fuel into natural gas is a very effective solution, achieving the reduction of CO₂ more than 20% while at the same time eliminating all the harmful emissions.

What kind of marine fuel will appear as an alternative to HFO should be discussed from the viewpoint of combustion quality, availability, cost (CAPEX and OPEX of ship), and ease of distribution in the world to allow proper preparations to be made before the afore-mentioned sulfur global cap and EEDI reduction become a reality.

This paper focuses how the alternative liquid and gaseous fuels will burn in a marine engine to support the above-mentioned discussion.