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Stena Bulk conducts onboard carbon capture trials

It discovered that OCCS technology could lower the vessel’s CO2 emissions by up to 20% annually, albeit at a fuel penalty of almost 10%.
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Under the Project REMARCCABLE project, the MR tanker Stena Impero, owned and operated by Stena Bulk, participated in an onboard carbon capture and storage study.

In order to reduce emissions while maintaining operational efficiency, this project sought to examine the technical and financial ramifications of retrofitting an onboard carbon capture and storage (OCCS) system. It discovered that OCCS technology could lower the vessel’s CO2 emissions by up to 20% annually, albeit at a fuel penalty of almost 10%.

The trial’s findings indicate that, under the assumption of a CII reduction factor of 2% per year starting in 2027, the 2018-built, 49,700-dwt Stena Impero can continue to operate in compliance until the end of its vessel life by maintaining its CII rating of “C and better” for an additional 9 years with the OCCS retrofit.

A modular mega skid carbon capture system that interacts with the ship’s current boiler system is part of the retrofitted OCCS design, which is projected to cost about $13.6M. However, this setup necessitates mechanical adjustments to enhance thermal energy availability.

The system’s yearly operating expenditure (Opex), which is mostly caused by higher fuel consumption, more staff, and routine maintenance, is about $830,000.

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