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Stolt Tankers’ carbon-insetting program leverages biodiesel to help reduce customer emissions


Guadagna, left (Photo: Stolt-Nielsen)

At the Marine Energy Transition Forum in Antwerp this month, Stolt Tankers’ sustainability expert outlined how its carbon-insetting program is helping to reduce scope 1 emissions and supporting its customers to lower emissions within their own supply chains.



Giorgio Guadagna, Stolt Tankers’ business partner for sustainability and decarbonization, explained that the program is supporting participants to achieve their respective sustainability goals.



For Stolt Tankers, this includes realizing ambitions to reduce its carbon intensity by 50 percent (relative to 2008) and operate at least one carbon-neutral ship by 2030, and to be fully carbon neutral by 2050.



“Carbon insetting has almost become standard practice in container shipping but is still relatively new for tankers,” Guadagna said. “It allows us to share the cost of biofuels with participating partners and help lower both our scope 1 emissions and their scope 3 [emissions]. Essentially, the program gives our customers and interested stakeholders the opportunity to contribute to the additional cost of more sustainable fuels, which have the potential to lower fuel-lifecycle emissions by more than 75 percent, even if their cargo is not physically on the ship where this type of fuel is used. Given the cost and limited availability of biofuels, this approach allows us to increase our chances of making biofuels a viable option and using them more widely.”



The program is specifically looking at biodiesel, also known as fatty acid methyl esters (FAME), which is best suited to the engines on Stolt Tankers’ ships.



The fuel must also be second generation, meaning it is produced from waste, and certified by the International Sustainability and Carbon Certification System to ensure its sustainability credentials.



To date, Stolt Tankers has used 3,000 metric tons of this marine biofuel on a small number of ships completing voyages between Europe and the U.S.



And there are plans to use it on more voyages before the end of this year and in early 2024.



Multiple independent third parties are being used to verify the resulting reductions in CO2 and certify shipments as carbon neutral.



“Biofuels do not dramatically change our onboard tank-to-wake emissions—that is, those that come from using fuel once it is in the tank,” Guadagna explained. “But they do allow us to significantly lower emissions over the lifecycle of the fuel—from its production until it is actually used—by more than 75 percent.”



Stolt Tankers stated, While biofuels are not widely seen as a long-term solution—not least because limited feedstocks are likely to create a bottleneck in their production—they are certainly part of the solution and are providing Stolt Tankers with an invaluable training ground for the future.”



Guadagna added, “For now, biofuels are a way for us to reduce our impact on the environment and progress towards our decarbonization targets. And, by setting up our insetting platform and learning how to do this effectively today, we will be well-positioned in the future when new green fuels become available and related tracking technologies are introduced.”

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