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Alternative Fuels

Mixing biofuels and VLSFOs might lead to ‘double whammy’ of stability / compatibility issues, fears Aderco

Formation of oxidation products continuously occur from decomposition of unsaturated hydrocarbons, leading to rapid degeneration of fuel properties with bio VLSFO blends, informs Philippe Lecloux.

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Aderco, a fuel treatment technology specialist with roots originating from the maritime industry, is in the midst of conducting comprehensive tests on biofuel oxidation and its compatibility with Very Low Sulphur Fuel Oil (VLSFO) material, learns Singapore bunkering publication Manifold Times.

“Biofuels, at the moment, is shipping’s most credible and cost-effective means towards decarbonisation,” states Philippe Lecloux, Aderco Group Head of Marine.

“However, the quality of biofuels differs around the world and product from Asia and Europe might not offer the same performance when compared. Combined with the well-known stability and compatibility issues of VLSFOs, this development might lead to a ‘double whammy’.”

FAME composition influences combustion

Biofuels include Fatty Acid Methyl Esters (FAME) compositions that are made up of different ratios of saturated and unsaturated fatty acids such as palmitic and linoleic acids, which influence combustion, according to Lecloux.

Palm-based biofuels have up to 50% of palmitic fatty acids in its composition; whereas soybean, sunflower and cotton derived biofuels have higher levels of linoleic fatty acids.

The difference lies in the concentration of saturated fatty acids (i.e. palmitic acids) in the biofuel as saturated hydrocarbons usually have a cleaner flame when burning, compared to unsaturated hydrocarbons that have a yellow flame with smoke.

Oxidation rates differ between biofuels

The formation of oxidation products such as hydroperoxides continuously occur from decomposition of unsaturated hydrocarbons, further leading to the rapid degeneration of fuel properties such as the flash point, cetane index and heating value, adds Lecloux.

Aderco’s research has proven that oxidation stability increases with the use of Aderco 2055G in bio VSLFO.

Rancimat Test (EN 14112) studies have shown time taken for volatile by-products to appear almost doubling in certain biofuels when Aderco 2055G has been added to the material, while a second research based on EB 15751 specification re-confirmed the additive’s positive influence on the oxidation stability of biofuel blends.

“These are some of the effects that can arise from the differences in the characteristic of the biofuel. Many of these are well researched over the last few years but a lot more research is required to figure out the compatibility between the different bio blends with VLSFOs,” he states.

Separation between bio VLSFO* and water interface is ‘key’

Research findings by Aderco have also pointed out separation between fuel and water surfaces within the bunker fuel tank to be an important factor in extending the storage stability of bio VLSFOs.

“An increase of bacteria will result in acidity of the water collected on the bottom of the bunker fuel tank, which negatively affects parameters such as pour point and pH while introducing corrosion,” he highlights.

“As such, the key is to stop the development of bacteria found within the water content of bio VLSFOs through the formation of an impenetrable ‘membrane’ between the bio blends and water interface.”

According to Lecloux, additives which are based on surfactant technology – such has Aderco 2055G – form a membrane around the water column inside the bunker fuel tank which prevents the growth of bacteria through the starvation of oxygen, eliminating the problem at its root.

“We are confident Aderco 2055G is able to improve the stability of bio VLSFOs blends. Our solution is backed by science and is, arguably, the most cost-effective method in existence to date.”

*Bio VLSFO – VLSFOs blended with biofuels (i.e. B10, B30, B50, etc)

Related: Aderco brings six years of inland biofuels experience to the maritime sector

 

Photo credit: Chokniti Khongchum from Pixabay
Published: 13 December, 2021

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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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