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Researchers receives USD 5.97 million grant to investigate ammonia fuel for marine decarbonisation

MariNH3 project will investigate full decarbonisation of marine transport emissions through multidisciplinary research focused on ammonia fuelled engine concepts.

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A group of academic and industrial partners have been awarded a GBP 5.5 million (USD 5.97 million) grant by the Engineering and Physical Sciences Research Council (EPSRC) to accelerate understanding, technologies and policies relating to the use of ammonia as a sustainable fuel, according to gas analyser manufacturer Signal Group Ltd on Monday (4 July). 

The project began in June 2022 and will run for 5 years.

Entitled Decarbonised Clean Marine: Green Ammonia Thermal Propulsion (MariNH3), the project brings together academics from Nottingham, Birmingham, Brighton, Cardiff and STFC, as well as partners such as regulators, oil companies, engine manufacturers and other industrial organisations.

The lead investigator is Prof. Alasdair Cairns, who is Chair in Propulsion Systems in the Faculty of Engineering at the University of Nottingham, where the majority of the research is being undertaken.

Explaining the importance of this work, Prof. Cairns said: “As countries seek opportunities for decarbonisation, there is a great deal of interest in green ammonia as an energy vector and a fuel for commercial shipping. However, there are a number of considerations relating to the greenhouse gas emissions of international shipping. Roughly 80% of the emissions from the maritime sector are emitted by larger commercial vessels (i.e. Megawatt scale engines), where alternative solutions such as electric and fuel cell remain limited in energy density and/or cost. This challenge is compounded by the fact that the engines in these vessels typically remain in service for several decades.  

“Ammonia represents an attractive solution, but significant challenges remain around slow combustion and the emissions of NOx, and it is these challenges we wish to address through research in fast burning and ultra-low NOx combustion systems. 

“As a group, the MariNH3 consortium firmly believes that a mix of technologies will be required for the most effective decarbonisation of the marine sector because there is no ‘silver bullet’ fuel or technology to shortcut the path to Net Zero. 

“Ammonia is set to play a key role, but there is current concern with the approach being adopted by some marine engine manufacturers, which involves ammonia dual fuelling, which is where some of the fuel oil (marine diesel) is replaced with ammonia as a retrofit solution. Typically, up to 40% diesel is still used in these engines, which will have consequences for local pollution, and limit the scope for decarbonisation. 

Researchers receives USD 5.97 million grant to investigate ammonia fuel for marine decarbonisation

“The vision of the EPSRC MariNH3 programme is therefore to investigate full decarbonisation of marine transport emissions through multidisciplinary research focused on highly promising disruptive ammonia fuelled engine concepts, which have the potential to allow full decarbonisation, whilst minimising pollution and end-use energy demand. 

“Our goal is to develop the best technical solutions in parallel with appropriate acceptance criteria and policy, so that we can develop technologies and policies which are ‘right first time’ and appropriately scaled across the marine sector. 

“The MariNH3 framework is based around a ‘technology agnostic’ approach to life cycle analysis to ensure that ammonia end-use is implemented appropriately. We wish to achieve this while developing the next generation of propulsion researchers, capable of adopting a technological and systems engineering approach to help steer and maintain the strong powertrain research community that we have in the UK.”

MariNH3 research

The project’s practical research is being conducted at the University of Nottingham’s Powertrain Research Centre in the Faculty of Engineering. This facility includes a broad range of resources for engine research, but the most relevant for this project are a new Volvo marine specification compression ignition (diesel) engine, a jet ignition engine and a comprehensive suite of Signal Group exhaust gas analysers.

Liquid ammonia is stored in a tank at the research centre and Research Fellow Dr Abdelrahman Hegab and Research Technician Nigel Sykes have installed a fuel supply line to the Volvo engine which draws vaporised ammonia from the tank. However, the combustion characteristics of ammonia differ greatly from conventional fuels, so the researchers are looking at ways to refine the technology whilst maximising the efficiency with which energy is utilised and minimising potentially harmful emissions. 

Dr Hegab explains: “The burning velocity of ammonia is relatively low, so there is potential for unburned ammonia to pass through to the engine exhaust. For this reason, Signal Group has supplied us with their new S4 NEBULA, a continuous ammonia analyser which employs tunable diode laser spectrometry (TDLS). This analyser is deployed in conjunction with a comprehensive suite of Signal’s reference method analysers to ensure that we are able to gain a full understanding of engine emissions under differing research conditions.”

Researchers receives USD 5.97 million grant to investigate ammonia fuel for marine decarbonisation

 

Photo credit: Signal Group
Published: 7 July, 2022

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Alternative Fuels

MPA and MSC ink MoU to support adoption of alternative bunker fuels

MPA and MSC will explore new routes and services to strengthen connectivity, support the adoption of alternative marine fuels such as bio-LNG, and advance technologies to improve vessel energy efficiency.

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MPA and MSC ink MoU to support adoption of alternative bunker fuels

The Maritime and Port Authority of Singapore (MPA) on Wednesday (3 June) said it signed a Memorandum of Understanding (MoU) with MSC Mediterranean Shipping Company to strengthen collaboration in maritime decarbonisation, digitalisation, innovation, and manpower development. 

The MoU was signed on 25 May 2026 by Mr Ang Wee Keong, Chief Executive of MPA, and Mr Soren Toft, Chief Executive Officer of MSC.

The MoU underscores the shared commitment of MPA and MSC to foster a sustainable, digital, and future-ready maritime sector, while enhancing MSC’s operational and business activities in Singapore. This year also marks the 30th anniversary of MSC establishing its Asia Regional Office and local office in Singapore.

Under the MoU, MPA and MSC will explore new routes and services to strengthen connectivity, support the adoption of alternative marine fuels such as bio-LNG, and advance technologies to improve vessel energy efficiency and operational performance.

MPA and MSC will also collaborate on maritime digitalisation initiatives to improve operational efficiency, including streamlining vessel arrivals and port operations. 

On manpower development, MSC will support internship and scholarship opportunities through Singapore Maritime Foundation’s Maritime Outreach Network (MaritimeONE) platform, an industry-led tripartite partnership comprising industry, government and institutes of higher learning that aims to raise awareness of the maritime industry and attract quality talent into the maritime sector.

Mr Ang Wee Keong, Chief Executive of MPA, said: “This partnership reflects the strong collaboration between MPA and MSC in driving sustainability and digitalisation in the maritime sector. By working together on decarbonisation, operational efficiency and talent development, we aim to strengthen Maritime Singapore’s position as a trusted and future-ready global maritime hub.”

Mr Soren Toft, Chief Executive Officer of MSC, said: “Singapore is a strategically important hub for MSC and a key gateway to the broader Asia region. As we mark 30 years in Singapore, this MOU reinforces our long-term commitment to strengthening our presence here. MSC and Singapore are closely aligned on the priorities shaping the future of global shipping, and we look forward to deepening this partnership to drive the continued growth and resilience of the maritime industry.”

 

Photo credit: Maritime and Port Authority of Singapore
Published: 4 June, 2026

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Methanol

Seaspan and Hapag-Lloyd complete first of five methanol vessel retrofit

Following “Seaspan Yangtze”, the remaining vessels planned for retrofit under the methanol retrofit programme are “Seaspan Amazon”, “Seaspan Ganges”, “Seaspan Thames”, and “Seaspan Zambezi”.

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Seaspan and Hapag-Lloyd complete first of five methanol vessel retrofit

Seaspan Corporation (Seaspan) and Hapag-Lloyd on Wednesday (3 June) announced the successful completion of the first of the five vessel conversions under their methanol retrofit programme with the delivery of Seaspan Yangtze.

From the early SAVER (Seaspan Action for Vessel Energy Reduction) programme to today’s CleanBlue initiative, Seaspan has committed over USD 230 USD million across 86 vessels, executing more than 550 efficiency and retrofit projects.

Following Seaspan Yangtze, the remaining vessels planned for retrofit under the programme are Seaspan Amazon, Seaspan Ganges, Seaspan Thames, and Seaspan Zambezi. Each retrofit is expected to reduce well-to-wake CO₂e emissions by approximately 30,000 to 50,000 metric tonnes per vessel annually when operating on low-carbon methanol, while also extending vessel lifespan and enhancing fuel flexibility.

“Decarbonisation is not just about building the fleet of tomorrow, it is also about unlocking the full potential of the fleet we have today. Retrofitting and upgrades on existing fleets play a practical, immediate, and economical role in accelerating shipping’s decarbonization journey,” said Bing Chen, Chairman, President and CEO of Seaspan. 

“Project SAVER CleanBlue highlights Seaspan’s strong customer partnerships, deep technical expertise, and unique platform integrated with JV partners, such as WattSpan Maritime Technology, in executing complex and large-scale retrofit projects.”

“The successful conversion of the Seaspan Yangtze together with the planned retrofit of its four sister vessels is another important step on our ambitious path towards net-zero fleet operations by 2045,” said Silke Lehmköster, Managing Director, Fleet, Hapag-Lloyd. 

“Together with Seaspan, we are demonstrating that retrofitting existing vessels for low-carbon methanol can be a practical way to reduce emissions in shipping.”

 

Photo credit: Seaspan
Published: 4 June, 2026

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Nuclear

South Korean-led nuclear car carrier design secures LR backing

LR is working with HHI, KSOE, Hyundai Glovis, G- Marine Service and KAERI on a joint development project exploring an advanced small modular reactor (SMR) installation on a PCTC.

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South Korean-led nuclear car carrier design secures LR backing

Classification society Lloyd’s Register (LR) on Tuesday (2 June) said it has teamed up with South Korean shipbuilding, marine services and nuclear research organisations to advance the development of a nuclear‑assisted car carrier concept. 

LR is working with Hyundai Heavy Industries, Korea Shipbuilding & Offshore Engineering (KSOE), Hyundai Glovis, G- Marine Service and the Korea Atomic Energy Research Institute (KAERI) on a joint development project (JDP) exploring an advanced small modular reactor (SMR) installation on a pure car and truck carrier (PCTC). 

The study focused on how a Molten Salt Reactor (MSR) could be physically and operationally integrated into a large vehicle carrier. Work examined the internal arrangement and segregation of the reactor system, shielding requirements, and the impact on cargo deck layout and vehicle capacity, alongside stability and trim implications linked to the reactor’s weight and positioning. 

The partners also assessed propulsion system configuration and power delivery, as well as operational flexibility compared with conventionally fuelled PCTCs, where trade routes and port calls can be tightly constrained. 

A key focus of the project has been safety. LR led hazard identification (HAZID) and preliminary risk assessment work, focusing on containment, onboard safety systems and potential operability constraints tied to nuclear technology at sea. 

The partners will mark the project milestone with an Approval in Principle (AiP) granting ceremony on 2 June at the LR stand during Posidonia 2026. 

Sung-Gu Park, President – North East Asia, Lloyd’s Register, said: “While nuclear propulsion is still at an early stage of development, this project shows the importance of building technical understanding now to support future progress. 

“Establishing feasibility at concept stage is a valuable step forward, particularly in areas such as cargo optimisation, vessel stability and integrated safety design.” 

Hong-Ryeul Ryu, CTO and Senior Executive Vice President at HD HHI, said: “With global environmental regulations becoming increasingly stringent and no definitive net-zero fuel yet available, SMR-powered ships can serve as a highly effective alternative, representing a pioneering next-generation maritime technology capable of complying with GHG emission regulations while allowing lifetime operation without refuelling, and HD HHI will remain at the forefront of sustainable maritime technology development.”

 

Photo credit: Lloyd’s Register
Published: 4 June, 2026

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