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Wartsila says scrubbers could capture CO2

  • Spanish Market: Emissions, Oil products
  • 16/03/21

Finnish engine maker Wartsila said carbon capture technology could be added to scrubbers to catch CO2 emissions from ships.

The exhaust-gas cleaning systems are currently used to remove harmful particulate matter from ship engine emissions, such as sulphur dioxide. Having a scrubber installed allows a ship to burn 3.5pc sulphur fuel oil and not be in breach of the 0.5pc limit imposed at the start of last year by the International Maritime Organisation (IMO). The number of ships equipped with scrubbers soared to more than 4,000 in 2020, from less than 500 in 2017, according to shipping classification society DNV GL. DNV data show that Wartsila has installed 575 scrubbers on ships, more than any other company. Sweden's Alfa Laval has installed 557.

Wartsila said that carbon capture and storage (CCS) technology is technically viable in ship scrubbers, and so could play a part in the shipping industry's efforts to reduce greenhouse gas (GHG) emissions. The IMO wants shipping to reduce GHG emissions by 50pc and CO2 emissions by 70pc, both by 2050 compared with 2008.

Wartsila's director of exhaust treatment Sigurd Jenssen said it would be a "substantial undertaking" to add CCS technology to vessels but could bring significant GHG emission reductions in a short timeframe. It is setting up a pilot plant in Norway to further test this.

In late February the European Parliament rejected calls for a ban on scrubbers. Several territories, including the key Asia-Pacific bunkering hub of Singapore, have banned open-loop scrubbers in their waters. These are by far the most common form of scrubber.


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