The Triton

Where in the World

Feadship develops alternate treatment for NOx emissions

ADVERTISEMENT

Feadship has created a new technology to reduce nitrogen oxide (NOx) emissions from diesel propulsion engines on yachts. 

Selective catalytic reduction (SCR) systems currently in use to bring engines into compliance with IMO tier III and EPA IV regulations only work when the exhaust temperature around the catalyst is at a certain level, which requires high speed, Feadship noted in a press release.

The systems also require yachts to carry a large volume of diesel exhaust fluid in holding tanks.

To address these issues, the company’s engineers partnered with the gas treatment department of the Netherlands Organization for Applied Scientific Research (TNO) to develop Oxywash, based on an idea from Roderick de Vries, technical director at Feadship Koninklijke De Vries Scheepsbouw.

According to Feadship, Oxywash systems remove NOx irrespective of engine temperature, take up less space, and are more environmentally friendly than standard SCR solutions. Oxywash works by making NOx water-soluble, then transferring it directly into seawater, where it is transformed into nitrite and nitrate.

When exhaust gas temperature is high, the reaction takes place via a catalyst; when the temperature is lower, ozone is instead injected into the gas to make it water-soluble. The ozone required is generated on board from the air, eliminating the need to keep chemicals on board, the company stated.

The technology is undergoing large-scale prototype testing, and the systems are expected to be ready for fitting on yachts soon, according to Feadship.

Related Posts

  • MarQuip releases IMO Tier III exhaust system for yachts under 500GT
  • Sea Science: Don’t let a dewy morning catch you with your chamois down
  • Captain’s creativity protects engine investment
  • Share This Post

    Leave a comment

    Your email address will not be published. Required fields are marked *

    Please answer the question below to leave a comment. * Time limit is exhausted. Please reload CAPTCHA.

    This site uses Akismet to reduce spam. Learn how your comment data is processed.

    Editor’s Picks

    Which of your tasks on a yacht would you prefer not to do?

    Which of your tasks on a yacht would you prefer not to do?

    It comes as no surprise that the least liked tasks on yachts have to do with the sewage system. Jerold MacKinnon: Replacing black water …

    Taking the Helm: First step for a good leader is staying quiet to listen

    Taking the Helm: First step for a good leader is staying quiet to listen

    Taking the Helm: by Capt. Paul Ferdais Something more and more common today is an inability or unwillingness to genuinely listen to …

    Pinmar starts trial of sprayable filler

    Pinmar starts trial of sprayable filler

    Yacht finishing company Pinmar, paint manufacturer AkzoNobel and surveyors Wrede Consulting have partnered on a research project to …

    Captain builds tender for users’ comfort

    Captain builds tender for users’ comfort

    Story and photos by Tom Serio He’s a big guy, with a big voice, and with big miles under his keel. Now he has big goals. Capt. …