Business

Bunker Flash: Chemical contaminants in fuels from ARA Region

CTI-Maritec obtained feedback from vessels encountering rapid wear on fuel pumps on main propulsion engines and increased deposit formation in the exhaust system.

Published

4 years ago

July 6, 2022

Admin

Marine fuel testing and marine surveying business Maritec Pte Ltd (CTI-Maritec) on Tuesday (5 July) issued an alert regarding presence of chemical contaminants in ARA region bunkers and its effects on fuel pumps and exhaust system.

Maritec has tested several VLSFOs delivered in the ARA region to be observed with the presence of chemical contaminants in the recent months. These VLSFOs also indicated elevated potassium content and acid number.

From these samples, CTI-Maritec has obtained feedback from vessels encountering rapid and excessive wear on fuel pumps on main propulsion engines and a tendency for increased deposit formation in the exhaust system.

Bunker Flash: Chemical contaminants in fuels from ARA Region

Figure 1: Exhaust grid fouling

Figure 2: Turbocharger Nozzle Ring fouling

Figure 3: Fuel Pump Plunger wear down

Forensic analysis by Gas Chromatography and Mass Spectrometry techniques, specifically ASTM D7845 GC/MS and Solid Phase Extraction (SPE) GC/MS, on some of the samples revealed the presence of the following compound groups at abnormally high concentrations

Fatty Acids and Monoglycerides (>1000ppm)
Alkylresorcinols (>2000ppm)
Phenolic compounds (>1000ppm)

Fatty acids and Monoglycerides are acidic compounds commonly found in fuels where the FAME content has broken down in the presence of water and have known to cause costly accelerated wear in fuel oil injection pumps. The presence of these compounds can also suggest an inclusion of substandard Bio-fuels into the blend. This also explains the high potassium content in the fuel as Potassium Hydroxide (KOH) is one of the possible catalysts used in the production of bio-diesel. The separation of the spent catalyst out from the final product is a complicated and expensive process. The increased potassium can also contribute towards the total ash forming tendency of the fuel leading to abnormal deposit formation in post combustion exhaust system components.

The presence of Alkylresorcinols and phenolic compounds suggests the inclusion of shale oil which is allowed as per the definition of ‘petroleum fuel’ in ISO 8217 standards. CTI-Maritec’s experience however has shown that the presence of these compounds tends to cause fuel instability leading to issues like filter blockages and purifier bowl overloading. This is despite the Total Sediment potential tests being within specification. Any sludge not capable of being removed by the fuel treatment system can cause combustion issues in the main engine.

If your vessel is expected to bunker in the ARA region; CTI Maritec advises to check the pre-bunkering certificate of quality or Manifold sample test results for signs of abnormally high potassium content (>110ppm) and/or high total acid number (>1.5mgkoh/g) and pre-emptively analyze the bunker fuels by Gas Chromatography and Mass Spectrometry (GC-MS) that can reveal the presence of undesirable compounds in the fuel thus safeguarding vessel operations.

In every case, CTI Maritec urges bunker fuel receivers to ensure thorough attention is given to the witnessing of correct sampling procedures during bunkering, counter-sealing and recording of seals in the bunker delivery note and any other documentation required to ensure correct representative samples are obtained during the bunkering process.

Collecting objective evidence on the storage, treatment and usage of the fuel is to be always given a high priority in the event an operational problem occurs to determine if the fuel used was one of the root causes for a machinery failure.

This document however does not reflect on the overall quality of fuel being supplied at ARA region.

The presence of off-spec marine fuels at the ARA region has been detected since late June:

Photo credit and source: CTI-Maritec
Published: 6 July, 2022

Legal

Shell Singapore charged over Pulau Bukom oil leaks, reporting delays

Shell faces four charges under Singapore’s Prevention of Pollution of the Sea Act over two 2024 oil discharge incidents at its Pulau Bukom facility.

Published

19 hours ago

September 25, 2026

Admin

2 MPA craft (left) supporting Shell craft in the clean up operations of the oil sheens taken on 28 Dec 9am

Shell Singapore has been charged over two incidents in 2024 involving oily mixtures discharged into Singapore waters from its facilities at Pulau Bukom, according to media reports on Tuesday (22 September).

The company faces four charges under the Prevention of Pollution of the Sea Act, including allegations that it failed to report the discharges to the port master immediately.

The first incident occurred on 20 October 2024, when approximately 40 metric tonnes (mt) of oily mixture was discharged through a hole in a pipeline at the Shell Singapore Energy and Chemicals Park at about 8am.

Shell is accused of reporting the incident to the port master at about 12.55pm, several hours after the discharge occurred.

The second incident took place between 26 and 28 December 2024. An estimated 485kg to 956kg of oil mixture was discharged into Singapore waters from the same facility.

Shell is accused of failing to report the incident immediately, with notification to the port master made at about 11.50am on 26 December 2024, according to the charges.

Singapore’s pollution-prevention regulations require occupiers of such facilities to report oil or oily-mixture discharges into Singapore waters “without delay and to the fullest extent possible”.

Shell’s representative requested an eight-week adjournment at the 22 September hearing, citing the need to obtain internal instructions, appoint counsel and locate historical records. The company said the business associated with the incidents had been divested in 2025.

The case was adjourned to October. Shell is also facing prosecution by Singapore’s National Environment Agency over the same incidents.

Photo credit: Maritime and Port Authority of Singapore
Published: 25 September, 2026

Incident

MPA probes Singapore Strait collision involving fishing vessel, bulk carrier

MPA says there were no reported injuries among the crew of either vessel in the incident involving China-registered fishing vessel “Lu Qing Yuan Yu” and Panama-registered bulk carrier “First Margaux” .

Published

19 hours ago

September 25, 2026

Admin

Panama-registered bulk carrier “First Margaux”

The Maritime and Port Authority of Singapore (MPA) on Tuesday (22 September) said it is investigating the incident involving the China-registered fishing vessel Lu Qing Yuan Yu and the Panama-registered bulk carrier First Margaux in the Singapore Strait on 17 September.

MPA said there were no reported injuries among the crew of either vessel or pollution arising from the incident and navigational traffic was not affected.

Videos circulating on social media showed the bulk carrier colliding with the fishing vessel.

“The fishing vessel took on water during the incident but remained afloat and stable, with the crew taking measures to manage the situation onboard,” MPA said.

The vessel was subsequently towed to Raffles Reserved Anchorage for assessment.

Essential crew remained onboard to support the tow, while the Singapore Civil Defence Force supported the transfer of other crew to shore.

MPA added it also issued navigational safety broadcasts to keep other vessels clear of the tow and escorted the vessel into port with a MPA craft.

Photo credit: MarineTraffic / Arnold Pohen
Published: 25 September, 2026

Mass Flowmeter

TFG Marine deploys first MFM-equipped bunker barge in Jamaica

Bunker barge “Kingston Trader” is currently on its way to Jamaica following the successful installation of a Coriolis mass flow meter (MFM) system, certified to ISO 22192.

Published

19 hours ago

September 25, 2026

Admin

TFG Marine deploys first MFM-equipped bunker barge in Jamaica

Global marine fuel supply and procurement firm TFG Marine on Thursday (24 September) said its bunker barge Kingston Trader is currently on its way to Jamaica following the successful installation of a Coriolis mass flow meter (MFM) system, certified to ISO 22192.

The company said the latest installation brings the proportion of TFG Marine’s fleet equipped with MFMs to approximately 88%, marking another step in the continued rollout of this technology across its global bunkering operations.

“The barge will operate in Jamaica through our local partnership with Scott Petroleum, becoming the first bunkering vessel in the region equipped with this technology and bringing greater accuracy, transparency and assurance to fuel measurement for customers across the Caribbean,” TFG Marine said in a social media post.

“Together with Scott Petroleum, we look forward to working collaboratively with the Maritime Authority of Jamaica, the The Port Authority of Jamaica, Petrojam Limited and other stakeholders to share our experience of MFM technology, explore its wider benefits and support the continued development of bunkering standards across the region.”

Manifold Times previously reported TFG Marine continuing to expand MFM technology across its US Gulf Coast bunker fleet with Buffalo B414 and Buffalo B304 being fitted with the equipment.

Last year, TFG Marine announced it reached a key milestone in its global digitalisation programme with the installation of an ISO 22192-compliant MFM on the Buffalo 404, a barge on time charter from American bunker barge company Buffalo Marine Service Inc.

The installation was part of TFG Marine’s wider strategy to equip close to 90% of its global bunkering fleet with MFMs by 2026 as a commitment towards improving data integrity, streamlining operations and strengthening trust in marine fuel transactions.

Photo credit: TFG Marine
Published: 25 September, 2026