Major Options to Comply with the IMO 2020 New Standard on Marine Fuels Sulfur Cap


Hot Topics

Sep 17 2019

Written by Axens

While worldwide regulatory bodies have spent decades incrementally reducing the allowable sulfur content of road transportation fuels – in many cases to ppm levels, the “bunker” fuels utilized by marine vessels travelling in the majority of the planet’s waterways will contain up 3.5 wt% sulfur until January 1, 2020, when the  International Maritime Organization (IMO) Marine Pollution (MARPOL) standards will reduce the maximum allowable fuel sulfur content to below 0.5 wt% for ships without exhaust gas scrubbers.


This regulatory commitment was announced in October 2016, providing refiners and ship owners 38 months to both plan and execute their response strategy. This implementation will result in a five-fold decrease in the effective Sulphur dioxide emissions, as compared with global average sulfur content in bunker fuels today.




Major Options For Complying With The New Regulations


The major options for compliance under the IMO framework are for ships to:

  •  Switch to alternative fuels including Liquefied Natural Gas (LNG) or Methanol, which inherently contain well below 0.5 wt% sulfur. For existing vessels, the conversion can be costly, and alternative fuel delivery infrastructure is challenged compared to traditional bunker fuels and is not for the moment widely available.

  • Install emission control technologies such as Stack Gas Scrubbers (SGS) to remove sulfur-containing acid gases (SOx) from their exhaust. Scrubber technology is readily available; however, its costs can be challenging for smaller vessels and existing ships, and scrubber installation displaces valuable cargo volumes. Moreover, there is uncertainty over the cost of disposing the sludge they create.

  • Purchase compliant, low sulfur (< 0.5 wt%) fuels. This option would require minimal or no investment for the ship-owner. However, as the majority of bunker fuels are derived from high-sulfur, residual sources, refiners do not currently produce sufficient volumes of such Low Sulfur Fuel Oil (LSFO) to satisfy projected demand, which effectively shifts the investment burden from the ship owner to the refiner.

Options for complying with New Regulations



The relatively short timeframe from the announcement to enactment coupled with bunker fuel pricing uncertainty has resulted in a wide range of proposed solutions from both fuel producers and consumers, with many asset owners taking a “wait and see” approach.


Refiners who wish to remain in the marine fuel market can either plan to sell product into the high sulfur bunker pool created by vessels equipped with emission control technologies or enter into the new low sulfur bunker market by investment, crude shift, operational change, or by blending traditionally higher-valued streams into the bunker fuel pool. Refiners who wish to exit the bunker market all together will utilize residue destruction technologies to convert bunker molecules to lighter products.


The technology options for both residual fuel desulphurization and destruction are commercially proven, and can generally be categorized as taking either the “carbon-rejection” or “hydrogen-addition” route, and offer refiners a wide range of conversion potential and capital intensity.



Key Take-Aways


It appears likely that a supply of (LSFO) derived from residual sources will trail demand resulting in: (1) significant volumes of low sulfur distillates being blended into the LSFO pool and (2) an increase in the spread between sweet and sour crudes.


Marine Bunkers product demand




The short-term consequence will likely be LSFO prices that trend closer to distillate value than residue, incentivizing refiners to invest in residue desulphurization projects and/or process more discounted sour crude.


However, in the long-term, the resulting premium paid by ship owners for LSFO will incentivize more wide-spread adoption of on-board emission control technologies, thus reducing the spread between HSFO and LSFO to a point where investment in relatively high cost residue desulphurization projects may not have sustained returns sufficient to justify their initial capital requirements.


With the inherent uncertainty of sweet/sour spreads for both bunker products and crude costs, the refiner with the flexibility to not only produce LSFO but to couple its production with the flexibility to increase conversion of heavy, sour feeds to higher-value road fuels will have a long-term competitive advantage.

Articles that might interest you


Let’s see what we can achieve together. Get in touch with us!

Contact us