Finnish technology group Wärtsilä has introduced the marine sector’s first commercially available 4-stroke engine-based solution for ammonia fuel.

The new solution enables a significant advance in sustainable shipping operations during a time in which ship owners are seeking viable options among green fuels.

The ammonia solution is now commercially available as part of the Wärtsilä 25 engine platform, which was launched in September 2022.

The Finnish company claims that the new Wärtsilä 25 Ammonia solution can immediately reduce greenhouse gas emissions by more than 70 percent, compared to a similar-sized diesel solution, meeting current EU targets until 2050 and even exceeding the IMO target for 2040.

“This industry-leading solution is yet another flagship moment in Wärtsilä’s extensive programme to ensure future marine fuels are both viable and safe,” Håkan Agnevall, President and CEO of Wärtsilä, commented.

Viridis Bulk Carriers, the world’s first zero-emission shipping company, will be the first shipowner to benefit from the new ammonia solution. The company is a partnership between Amon Maritime, Mosvolds Rederi and Navigare Logistics. Viridis Bulk Carriers is bringing a ‘green game changer’ to the European short sea bulk market, planning a carbon-free transportation service based on a series of ammonia-powered newbuild vessels.

Earlier this month, Wärtsilä and Viridis Bulk Carriers signed a letter of intent (LoI) for the Wärtsilä 25 ammonia engine solution, targeting to sign a commercial contract in early 2024.

“The maritime industry must significantly reduce its emissions if we are to succeed in reaching the goals set in the Paris agreement. The adoption of new technologies and ammonia as a carbon free fuel is central to this,” André Risholm, Board member at Viridis Bulk Carriers, said. “We are delighted to partner with Wärtsilä on another important milestone for our ammonia-powered short sea bulk vessels.”