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Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping publishes paper on biodiesel bunker fuels

Paper presents the results from the working group, including an overview of regulatory drivers, onboard vessel bunkering, handling, and storage considerations.

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Using bio diesel onboard vessels

Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping (MMMCZCS) on Tuesday (20 June) released a paper on fuel handling recommendations, fuel sample analysis procedures, and emission management considerations for using biodiesel bunker fuels.

“While biodiesels and bio-oils do not have the same chemical composition, performance, or qualities as each other, they present similar challenges for onboard use,” it said in a social media post.

“As a result, we established a dedicated working group to study the potential challenges of using biodiesel onboard vessels, which we expect to provide foundational knowledge of the challenges associated with the use of bio-oils onboard.”

The paper presents the results from the working group, including an overview of regulatory drivers, onboard vessel bunkering, handling, and storage considerations. 

“We also include experimental results from our investigations of fuel stability and NOX emissions measurement tests. Furthermore, we provide our recommended step-by-step processes for bunkering and onboard handling.”

Based on our investigations, the working group made the following conclusions:

  • Recent regulatory developments have lowered the barriers to using biofuels onboard vessels. However, work is still needed on fuel standards and sustainability life-cycle certification.
  • The Unified Interpretation (UI) approved at MEPC 78 in June 2022 allows for a more streamlined regulatory scenario for the use of biofuels onboard vessels, especially if flag states adopt the UI and classification societies and engine makers confirm no changes to the engine’s NOX
    critical components or settings/operating values.
  • With the lack of applicable fuel standards, it is presently up to the individual shipowner or operator to build knowledge and experience about proper fuel parameters and handling.
  • While some sustainability certification schemes exist, they must be standardized and aligned with the current and upcoming global and regional regulations.
  • Due to the possibility of varying stability, acidity, and corrosion characteristics of biodiesels, they must be handled and stored correctly onboard using operational measures with limited technical changes.
  • We recommend pre-bunkering steps including determining the blend composition, laboratory testing, and confirming compliance with International Maritime Organization (IMO) safety regulations and machinery.
  • Onboard handling requires bunker storage tank cleaning (subject to the sludge and sediment content in the bunker tanks) and adjustment of storage and transfer temperatures.
  • Fuel sample analyses can be used to indicate acceptable oxidation stability levels for typical fuel use periods. If required, readditization of antioxidants can prevent fuel oxidation, as seen from studies done in the automotive industry. Such trials are yet to be conducted in the maritime industry onboard vessels.
  • Results from three emissions measurement tests showed that NOX emission levels of biodiesel and biodiesel blends combusted in two-stroke slow speed marine engines are comparable with conventional fossil fuels, including heavy fuel oil (HFO), very low sulfur fuel oil (VLSFO), and marine gas oil (MGO).
  • These results also indicate that there is no need for special emission reduction technologies or solutions to reduce NOX emissions further when using biodiesels. However, if NOX emission reduction is necessary, commercially available technologies and solutions exist.

The conclusions presented in the paper are based solely on tests of fatty acid methyl esters (FAME)-based biodiesel fuels. The NOX emission levels presented here form a benchmark for comparison with fast pyrolysis and hydrothermal liquefaction bio-oils when their technology matures, and they are available in larger quantities.

To increase the viability of the liquid biofuel pathways, MMMCZCS encourages flag states, classification societies, and engine makers to jointly leverage the approved UI to remove the regulatory barriers for the use of biodiesels and bio-oils onboard vessels and support the development of fuel standards for blends with higher percentages of biodiesel and bio-oil.

The paper is the fourth in the Onboard Vessel Solustions series, covering the impact and role of vessel greenhouse gas and air pollutant emission reduction in maturing alternative fuel pathways.

Note: The paper titled ‘Using bio-diesel onboard vessels’ can be downloaded here.

 

Photo credit: Mærsk Mc-Kinney Møller Center
Published: 23 June, 2023

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Biofuel

BHP and GCMD trial multi-feedstock B100 bio bunker fuel on bulk carrier

Bio-blend in the BHP and GCMD pilot is being used on a BHP-chartered bulk carrier “Berge Lyngor”, which was bunkered in Singapore in early May.

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BHP and GCMD trial multi-feedstock B100 bio bunker fuel on bulk carrier

BHP and the Global Centre for Maritime Decarbonisation (GCMD) on Wednesday (3 June) said they have blended biofuels from two distinct feedstocks—used cooking oil and waste animal fats —and introduced the lower-emissions marine fuel into a BHP-chartered bulk carrier as part of a pilot project.

The bio-blend in the BHP and GCMD pilot is being used on a BHP-chartered bulk carrier Berge Lyngor, owned and operated by Berge Bulk, transporting BHP iron ore from Western Australia to China. When run on bio-blend, the vessel has the potential to reduce well-to-wake greenhouse gas emissions by approximately 79 per cent per voyage compared to sailing on very low sulphur fuel oil (VLSFO).

The vessel bunkered in Singapore in early May with a B100 bio-blend comprising 50 percent tallow-derived biodiesel, sourced and supplied by HAMR Energy, and 50 per cent used cooking oil (UCOME) supplied by Mitsui & Co Energy Trading Singapore (METS).

Mitsui also blended the fuel and Dan-Bunkering coordinated and executed the bunkering operation, which was performed by Global Energy’s barge MT Maple.

The BHP and GCMD pilot will assess how biofuels from multiple feedstocks can be blended, handled, and introduced under real-world operating conditions using existing used cooking oil bunkering infrastructure.

At the same time, insights from this pilot will help identify solutions to challenges related to fuel quality, handling, traceability, and onboard vessel performance.

Biofuels for global shipping today rely heavily on used cooking oil – a feedstock whose availability is approaching its projected limits. Biofuel from waste animal fats presents a promising option to expand the supply of lower-emissions marine fuels.

The outcomes of the pilot are expected to shed light on the practical steps to integrate biofuel blends from different feedstocks into existing supply chains. The diversity of biofuels will provide shipowners and operators with greater flexibility to optimise fuel procurement based on cost, availability, and lifecycle emissions performance.

Biofuels derived from different feedstocks can exhibit varying properties that may impact operations, including potential corrosion from oxidation, fuel system clogging caused by wax formation, which this pilot aims to assess.

The pilot will trace and verify the biofuel blend’s integrity aimed at bolstering confidence in emissions reductions reporting. The pilot will also provide insights into how robust tracing can support future marine fuel supply chains where biofuels from multiple feedstocks with varying lifecycle greenhouse gas emissions footprints are blended together.

This project is co-funded by the Maritime and Port Authority of Singapore under the Maritime Innovation and Technology Fund (MINT).

 

Photo credit: Global Centre for Maritime Decarbonisation
Published: 3 June, 2026

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Biofuel

NYK starts one-year B100 bio bunker fuel trial on car carrier

In this trial, NYK will operate a car carrier continuously on B100 for one year to evaluate the impact on engines, fuel supply systems, and operational practices.

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NYK starts one-year B100 bio bunker fuel trial on car carrier

Japanese shipping firm NYK on Tuesday (2 June) said it has commenced a one-year long-term trial involving the continuous use of 100% biofuel (B100) on an NYK-operated car carrier. 

In this trial, NYK will operate a car carrier continuously on B100 for one year to evaluate the impact on engines, fuel supply systems, and operational practices. High-purity biofuels such as B100 are known to be susceptible to degradation from oxygen, light, and heat, raising concerns about the stability of such fuels during long-term use.

In this trial, the biofuel primarily comprises FAME (Fatty Acid Methyl Ester) derived from used cooking oil and similar feedstocks.

The initiative is designed to evaluate the fuel’s effects on the vessel’s equipment and verify operational safety under real-world conditions. 

Through this effort, NYK seeks to accumulate technical expertise that will support the broader use of high-purity biofuels and further accelerate efforts to reduce greenhouse gas (GHG) emissions.

NYK has been advancing the use of biofuels through various initiatives. In 2024, the company conducted a trial using biofuel blend B24 and subsequently expanded practical usage to B30. However, the company said there remains limited global experience with the long-term continuous use of B100.

“By collecting long-term operational data through this trial, NYK aims to accumulate valuable technical insights to support both the safe operation of vessels and the wider adoption of high-purity biofuels,” it said. 

 

Photo credit: NYK
Published: 3 June, 2026

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Ammonia

AM Green plans to build green ammonia plant at Indian port

Initiative also includes development of green ammonia handling, storage and bunkering infrastructure, pilot bunkering operations, safety procedures and training programmes, says VOC Port Authority.

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VO Chidambaranar (VOC) Port Authority on Friday (29 May) said it has signed a Memorandum of Understanding (MoU) with India’s ammonia producer AM Green Ammonia to collaborate in the development of a green ammonia production plant.

The plant will have a capacity of one million tonnes per annum (MTPA) at Tuticorin.

The initiative also includes development of green ammonia handling, storage and bunkering infrastructure, pilot bunkering operations, safety procedures and training programmes. 

The project is expected to support the development of green fuel corridors connecting VOC Port with major ports in Europe and Asia, thereby strengthening India’s position in the global green fuels value chain.

VOC Port also signed a Memorandum of Understanding (MoU) with Bureau Veritas (India) Pvt. Ltd., to collaborate on Green Port certification, emissions accounting, ESG reporting, safety validation, development of green bunkering practices, and establishment of a Centre of Excellence for green fuels and sustainability.

The port also plans for an upcoming 750 m³ green methanol bunkering facility.

 

Photo credit: Naveed Ahmed on Unsplash
Published: 3 June, 2026

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