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To combat air emissions, MARPOL Annex VI establishes a global fuel sulphur cap, as well as stricter regulation in Emission Control Areas (ECAs). The legislation refers to fuel sulphur levels, but compliance is also possible by cleaning SOx from the exhaust gas.
MARPOL Annex VI progressively reduces the allowed sulphur content of marine fuels. As of January 1st, 2020 there is a global cap of 0.5%S, while a 0.1%S limit applies in ECAs.
The aim is to keep harmful sulphur oxides (SO2 and SO3) and particulate matter (PM) from being released into the air. This is why IMO allows higher-sulphur fuels to be used with SOx scrubbers, which achieve the same result by cleaning the exhaust gas.
Today’s HFO has a sulphur content well above the limits established by MARPOL Annex VI. That leaves you as a ship owner with three options, each of which has different implications.
+ Allows continued use of economical HFO
- Payback time depends on fuel price delta (HFO vs low-sulphur)
+ Low investment cost
- Higher long-term costs than using HFO with a scrubber
- Uncertain fuel price and availability
+ Always in SOx compliance
- High investment cost
- Complicated retrofitting
- Limited infrastructure and uncertain fuel price
In this film, Mr. Dario Bocchetti and Mr. Alberto Portolano from the Grimaldi Group explain why their company has chosen the scrubber technology and why they place their trust in Alfa Laval.
SOx scrubbers provide an opportunity for long-lasting fuel cost savings. No scrubber system lets you make more of that opportunity than PureSOx from Alfa Laval.