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31 October 2020 The on-line newspaper devoted to the world of transports 19:28 GMT+1

September 22, 2020

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Original news
Scrubbers have a lower climate impact than low sulphur maritime fuels

This is highlighted by a study by CE Delft

The total CO2 emissions produced by ships use exhaust purification systems are lower ships that use low-fuel fuel as fuel. sulfur content. This is highlighted by the new study entitled "Comparison of CO2 emissions of MARPOL Annex VI compliance options in 2020" carried out by the independent consultancy and research organisation CE Delft. The document, which - the organization has pointed out - is commissioned by three primary providers of sewage treatment, remember that, as a result of changes in annexed VI of the Marpol International Convention for prevention of pollution caused by ships, since the last first January the maximum sulphur content in combustible oils maritime use outside of control zones emissions is 0.50%, while since 2015 in these areas the limit is 0.10%.

The study explains that ships have two options for complying with Marpol's Annex VI rules: use an Exhaust Gas Cleaning System (EGCS), which is a scrubber, in combination with oils fuels with a sulphur content of more than 0.50% or 0.10%, or use fuel oil directly with a Very Low Sulphur Fuel Oil - VLSFO) or with a maximum content of 0.10% (Ultra-Low Sulphur Fuel Oil) ULSFO).

Research finds that both options lead to an increase in CO2 emissions throughout the well-to-wake cycle (from the well EGCS requires energy generated by the fuel-fired engines that produce CO2, to which add emissions associated with the production of the same scrubbers and emissions from seawater, and as the de-sholeing process carried out at the refinery requires hydrogen that is generally produced by methane CO2 emissions, as well as energy, during the process.

With the CE research, delft has therefore quantified and compared CO2 footprint of both options, which shows that the use of EGCS system increases by between 1.5% and 3% CO2 emissions for a range of ships from the main whereas, if the de-singing inevitably leads to improving fuel quality in terms of fuel aromatic content and viscosity, the increase in emissions associated with the refinery debaphore process 1% and, in many cases, several times depending on the degree of quality improvement fuel, refinery efficiency and crude oil Used.

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