Site items in: NOx Emissions

Wärtsilä launches new multi-fuel maritime engine
Article

Wärtsilä has just launched its medium-speed, 4-stroke, Wärtsilä 25 engine, intended to be the first Wärtsilä engine to run on ammonia fuel. From 2023 a technology upgrade will be commercially available to allow the engine to run on alternative fuels like ammonia, with a fully-compliant NOx abatement system already available when running on fossil-based fuels. At the recent Australia conference, MAN ES reported that their two-stroke ammonia engine will be commercially available in 2024, with testing to commence next year.

Developing ammonia maritime engines & fuel: a collaborative approach
Article

The latest episode of Maritime Ammonia Insights webinar centred around collaboration, leadership & Singapore: three critical elements in the maritime ammonia transition. Sofia Furstenberg Stott was joined by Peter H. Kirkeby (MAN Energy Solutions) and Yi Han Ng (Maritime and Port Authority Singapore), who discussed timelines for engine development, the benefits of a consortia approach, and the all-important safety & technical progress of maritime ammonia technologies.

MAN Energy Solutions 2 stroke Ammonia engine
Presentation

The marine industry is convinced that Ammonia is not only a very strong candidate as a future fuel, but also that Ammonia will be one of the leading future fuels. MAN Energy solutions has worked since 2019 on the development of a two stroke engine burning Ammonia by using the Diesel principle (as used for other fuels such as Methane , Methanol, Ethane and LPG) In this presentation, we will give an update on the engine design, which we will start testing in Copenhagen in Oct. 2022. The first ammonia engine (with final engine design and combustion process) is scheduled…

Mainspring: ammonia-fed, “linear” power generators
Article

US-based Mainspring Energy has announced successful testing of pure ammonia fuel in its Linear Generator technology. Running on pure (anhydrous) ammonia, the overall system efficiency was 1% higher than conventional gas fuels, and Mainspring indicates that “off-the-shelf” technology available for current gas turbine models can yield NOx emissions that “meet any permitting standard”. Mainspring aims for its product to displace diesel-powered backup generators in a variety of applications.

DoE funding for ammonia energy
Article

As part of a new round of funding announcements, the US Department of Energy will contribute nearly $10 million to three significant ammonia energy initiatives:

  • GTI Energy (a recent rebrand of the Gas Technology Institute) will develop a prototype ammonia-powered gas turbine.
  • Raytheon will develop and demonstrate an ultra-low NOx emitting ammonia combustor module for gas turbines.
  • And 8 Rivers received backing to complete a pre-FEED study for its CCS ammonia project in Evanston, Wyoming.

Ammonigy: Speedboats powered by green ammonia
Article

In order to demonstrated ammonia-fueled solutions in a variety of applications, Stuttgart-based organisation Ammonigy has developed two patented technologies: a modular cracking unit that provides hydrogen to act as an “igniter” for the ammonia fuel, and an exhaust treatment system to minimise NOx emissions from the engine. But, while the principles behind Ammonigy’s technology solutions are very familiar to our readers, using them to convert a speedboat to run on ammonia fuel is certainly new! This week we explore results from testing on the GREEN AMY: the world’s first ammonia-powered speedboat.

New benchmark for coal co-firing reported in China
Article

The South China Morning Post reports that China Energy Investment Corporation has successfully demonstrated co-firing 35% ammonia with coal at a power generation unit in Shandong Province. Further technical details emerged from additional Chinese media outlets, including that the pilot test occurred in a 40 MW coal boiler at the Huaneng Yantai coal power plant, and that NOx emissions were reportedly lower than burning pure coal fuel.

Ammonia combustion analysis: powertrains, turbines & power generation
Article

This week we explore four updates in ammonia combustion R&D:

1. A team from the University of Cambridge has shown merchant vessels are the strongest candidates for conversion to run on ammonia powertrains, with cargo capacity losses of 4-9% able to be feasibly offset by operators.

2. Researchers at the University of Minnesota have successfully tested a thermochemical recuperation (TCR) reactor to improve the efficiency of a dual-fuel, diesel-ammonia compression ignition engine by minimising ammonia slip.

3. A global team led by Cardiff University researchers has revealed some of the inner workings of ammonia combustion in gas turbine flames.

4. A global team has produced a cradle-to-gate environmental assessment for ammonia production and ammonia-based electricity generation, suggesting that renewable and nuclear ammonia have a significant role to play in decarbonising the power sector.

IHI’s Development of Ammonia Combustions Technologies / Fuel Ammonia and Hydrogen Solutions
Presentation

IHI, as a pioneer in the development of the ammonia value chain, has been developing fuel ammonia technology for the last decade. Utilizing existing infrastructure that is either already in place or that can be readily modified, fuel ammonia is highly anticipated as a critical resource to reach a carbon-neutral society. In the presentation, IHI will highlight its involvement in the development of combustion technologies of fuel ammonia for power generation.  A specific focus will be placed on the ongoing development and implementation of 20% ammonia co-combustion in existing coal fired power plants.  The presentation will feature the JERA demonstration…

Impact of ammonia as a fuel / co-fuel on NOx emissions
Presentation

Ammonia is a hydrogen-based, carbon-free energy carrier. It has good energy density (22.5 MJ/kg) and can be liquefied (about 10 bar at 298 K). With the increasing demand to lower the CO2 emissions worldwide, pure ammonia combustion or co-combustion with a conventional fuel is an alternative solution in turbines, gas engines, power plants, furnaces, and cement kilns. The major challenges with the use of ammonia as a fuel are lowered heat flux and increased NOx emissions. These parameters were analyzed in Linde’s lab-scale tests with pure ammonia as well as mixtures of ammonia and natural gas. Tests were conducted with…