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Maritec recommends onboard bunker samples for compliance amid high sulphur warning

In December, Maritec reported several cases where tested VLSFO manifold samples recorded a sulphur content exceeding the mandatory allowable 0.50%m/m.

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Maritec VLSFO

Singapore-based marine fuel testing and marine surveying business Maritec Pte Ltd (Maritec), now a subsidiary of Shenzhen-listed Centre Testing International Group’s (CTI), on Monday (22 February) published some advice for shipowners on how best to meet IMO 2020 fuel testing requirements following reports of excessive sulphur in some very low sulphur fuel oils.

In a Technical Bulletin issued to customers in December, Maritec reported several cases where tested VLSFO manifold samples have recorded a sulphur content of between 0.51 to 0.53%m/m, exceeding the mandatory allowable 0.50%m/m.

Maritec noted this accounts for about 1.23% of VLSFO tested to date.

The company added, since the implementation of IMO 2020, there is “confusion and frustration” as to whether the ISO 4259 upper limit of 0.53%mm still applies or not.

“Given that there will be variability between test results, even from identical samples tested in the same lab, it raises the question: when does an individual test result indicate that the tested VLSFO fuel is compliant?” Said Maritec VP Business Development John Ren Di.

“IMO has adopted a 95% confidence testing boundary which is given by ISO 4259 as 0.59 times the reproducibility value R (expressed as 0.59R). However, this applies only to in-use and onboard samples and not the sample taken at the manifold.”

In highlighting the challenges and inconsistencies in determining the sampling location of onboard and in-use samples, Maritec reminds ship operators that in-use sampling points need to be fitted to existing ships built before 01 April 2022 no later than the first IAPP renewal survey after 01 April 2023. For new ships they need to be designated on delivery.

Maritec emphasizes that in-use and onboard samples cannot exceed the maximum limit of 0.53% m/m. If sulphur content is found to exceed 0.53%m/m, then the source of contamination must be detailed, and evidence provided indicating that all possible steps were taken to ensure compliance.

“It would be prudent for vessel staff to witness and document sampling and sealing by Port State Control Inspectors,” added Ren Di. “Ideally, they should take representative samples of their own and countersealed by the sampling inspector for independent verification in case of dispute.”

Maritec recommends that, in addition to routine full analysis on new bunker samples, crew also take onboard and in-use samples. Maritec provides the sulphur verification kit to all vessels in their testing programme.

“There is always a possibility of loading non-compliant fuel onboard. Mitigating this risk begins with sourcing and purchasing compliant fuel oil and reducing the risk of poor-quality fuel oil being delivered to the vessel,” said Ren Di.

“Knowing the appropriate limits at each stage of the process will help keep vessels compliant and operating in line with IMO’s objective to reduce air pollution and protect the environment.

Marpol Annex VI amendments for fuel oil sampling are expected to enter into force on 1 April 2022.

Photo credit: Maritec
Published: 23 February, 2021

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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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