Decarbonizing the shipping sector requires regulatory support at both global and regional levels. Recent developments highlight the challenges and potential solutions in implementing alternative fuels and reducing emissions. The International Maritime Organization’s (IMO) Carbon Intensity Indicator (CII) and other regional initiatives are key components of this effort.
Criticism of the Carbon Intensity Indicator (CII)
The CII, introduced by the IMO, assesses a ship’s carbon efficiency and rates it from A to E based on grams of CO2 emitted per metric tonne of cargo per nautical mile. However, the CII has faced criticism for potentially flawed metrics. Studies indicate that the current formula favors ships that travel longer distances and penalizes those affected by waiting times and port delays. Trade bodies argue that the CII unfairly penalizes efficient ships carrying cargo and propose revisions to address these concerns.
US Congressional Proposals for Shipping Emissions
In the United States, some Congress members have called for a “goal-based fuel standard” for ships at US ports. This would involve setting specific targets for reducing greenhouse gas (GHG) intensity in marine fuels. They have also suggested phasing out scrubbers, which are devices used to reduce emissions from ships. These proposals reflect growing regional efforts to address shipping emissions and promote cleaner fuel alternatives.
Developments in Alternative Fuels
Significant advancements are being made in alternative fuels, particularly in the use of methanol and ammonia. German engine maker MAN Energy Solutions plans to retrofit four-stroke engines to dual-fuel systems that consume methanol. Meanwhile, NYK Line and TB Global Technologies have developed a bunkering boom for ammonia, approved by ClassNK. NYK Line is also among the companies shortlisted to develop ammonia bunkering in Singapore, aiming to deliver at least 100,000 mt/year of ammonia for bunkering at Jurong Island. These initiatives represent important steps towards the adoption of sustainable fuels in the maritime industry
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Source: ENGINE
