Alternative Fuels

Kirby Inland Marine christens first plug-in hybrid electric inland towing vessel in US

Vessel will be time chartered by Shell Trading (US) Company, which will use the boat to push barges throughout the Houston port region; propulsion is provided by two 575 KW Danfoss electric motors.

Published

2 years ago

August 31, 2023

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Houston-based Kirby Corporation subsidiary Kirby Inland Marine, LP christened the Green Diamond, US’ first plug-in hybrid electric inland towing vessel, at a ceremony in Houston on Friday (25 August)

Following the ceremony, the vessel will be time chartered by Shell Trading (US) Company, which will use the boat to push barges throughout the Houston port region. Shell Energy Solutions is providing electrical power matched 100% by Green-e® certified renewable energy certificates to charge the vessel’s battery system.

“We are excited to be the first to market with a plug-in hybrid inland towing vessel,” said Christian O’Neil, President of Kirby Inland Marine.

“Barge transportation is already the cleanest and greenest way to move a wide variety of cargoes in America, and we are working to make it cleaner and greener. Our customers who are focused on reducing their emissions want more efficient options. This solution is available today.”

“We expect the Green Diamond, with its unique “Eco-Tug” logo, to be a fixture in the Port of Houston for years to come.”

The Green Diamond is the product of collaboration among many Kirby-owned companies. The vessel was constructed by San Jac Marine, LLC, Kirby’s shipyard in Channelview, TX. Stewart & Stevenson Manufacturing Technologies, another Kirby company, designed and installed the power management, control and propulsion systems. A host of vendors provided other key systems for the first-of-its-kind vessel.

Propulsion is provided by two 575 KW Danfoss electric motors that can be driven either by the Corvus Orca series battery system, which provides 1243 KWH of power, or, if needed, onboard Caterpillar generators. A Shell New Energies US-owned charging system purchased from Zinus will be used for dockside charging of the battery system, allowing the vessel to operate on trips within the Houston area without ever needing to start the generators.

According to Kirby’s modeling, when operating on shore supplied power, the fuel use can be reduced by almost 80%, resulting in an estimated 88 to 95% reduction in emissions of nitrous oxides, carbon monoxide and hydrocarbons. Engine run time can be reduced between 93 and 98% compared to a conventional inland towing vessel. When in hybrid mode with the generators running, the boat is expected to have an estimated 27% reduction in emissions compared to a conventional towing vessel.

“The plug-in hybrid design offers numerous advantages for towboats in certain trades,” said Mitch Jones, Vice President of San Jac Marine. “We are already looking at building follow-on vessels.”

Stewart and Stevenson Executive Vice President Chad Joost, said: “As a leader in electric fracturing equipment, Stewart & Stevenson already has a proven track record of high horsepower electric systems that save energy and reduce emissions in the oilfield. We were able to adapt that patented technology to the marine environment and enable this vessel to operate on shore power and charge the batteries while on dock, then get underway on battery power. On extended trips, the generators will be used to supply power to the motors and charge the batteries. All of this happens seamlessly through Stewart and Stevenson’s power management system.”

Photo credit: Kirby Corporation
Published: 31 August, 2023

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Biofuel

NYK to launch Japan’s first antioxidant for biodiesel bunker fuel in August

When added to biofuel, BioxiGuard slows progression of oxidative degradation and helps deter issues such as metal corrosion, strainer blockage, and cleaning-system fouling often triggered by oxidised fuel.

Published

16 hours ago

May 22, 2025

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Japan’s first antioxidant by NYK for biodiesel bunker fuel set to release in August

Nippon Yuka Kogyo (Nippon Yuka), an NYK Group company specialising in chemical R&D as well as the manufacture and sale of chemical products, on Wednesday (21 May) announced the upcoming release of BioxiGuard, the Japan’s first antioxidant specially developed for marine biodiesel, from 10 August.

NYK said compared with conventional petroleum-based fuels, biofuel contains a higher proportion of unsaturated fatty acids, making it more susceptible to oxidative degradation. Once oxidised, the biofuel can produce acidic substances and sludge, adversely affecting vessel fuel efficiency by reducing the fuel’s calorific value.

Developed by Nippon Yuka based on property analyses of the biofuel used in NYK-operated vessels, BioxiGuard is specifically formulated to enhance the oxidation stability of biodiesel. When added to biofuel, BioxiGuard slows the progression of oxidative degradation and helps deter issues such as metal corrosion, strainer blockage, and cleaning-system fouling often triggered by oxidised fuel.

According to laboratory tests conducted by Nippon Yuka researchers, the addition of BioxiGuard at a concentration of 1 part per 500 resulted in an approximate 50% reduction in the rate of biofuel degradation compared to untreated biofuel.

This significant improvement underscores the potential for vessel operators to not only extend the useful life of biofuel on board but also maintain more stable and cost-effective vessel operations.

Photo credit: NYK
Published: 22 May, 2025

Newbuilding

Höegh Autoliners latest LNG dual-fuel PCTC en route to Shanghai for bunkering

The 9,100 CEU “Höegh Sunrise”, currently sailing the seas, is on its way to Shanghai for bunkering before sailing to Japan and then towards Europe.

Published

16 hours ago

May 22, 2025

Admin

Höegh Autoliners latest LNG dual-fuel PCTC en route to Shanghai for bunkering

Höegh Autoliners on Tuesday (20 May) said its latest liquefied natural gas (LNG) dual-fuel pure car and truck carrier has departed China Merchants Heavy Industry’s yard, ready to commence its commercial operations.

The 9,100 CEU Höegh Sunrise, currently sailing the seas, is on its way to Shanghai for bunkering before sailing to Japan and then towards Europe.

The PCTC is the fifth in a series of 12 Aurora Class vessels built by the shipyard in China. The first eight Auroras are or will be equipped with engines primed to run on LNG and low-sulphur oil.

These vessels can be converted to run on ammonia later. By 2027, Höegh Autoliners said the four last vessels of the series will be able to run net zero on ammonia directly from the yard when delivered.

Manifold Times previously reported the naming ceremony of Höegh Autoliner’s fourth Aurora Class newbuild, Höegh Sunlight, at Taicang Haitong Auto Terminal.

Photo credit: Höegh Autoliners
Published: 22 May, 2025

Alternative Fuels

UECC: Liquefied biomethane bunker fuel to enable compliance surplus under FuelEU

Company says bunkering liquefied biomethane will give it a significant compliance surplus under FuelEU that can be monetised through the regulation’s pooling mechanism.

Published

16 hours ago

May 22, 2025

Admin

UECC: Liquefied biomethane bunker fuel to enable compliance surplus under FuelEU

United European Car Carriers (UECC) on Monday (19 May) said bunkering liquefied biomethane (LBM), also known as bio-LNG, will give it a significant compliance surplus under FuelEU that can be monetised through the regulation’s pooling mechanism.

UECC’s Senior Manager of Business Planning & Sustainability, Masanori Nagashima, said bio-LNG is now seen by the company as the key fuel to achieve its target of a 45% reduction in carbon intensity by 2030 versus a 2014 baseline and net zero by 2040 – ahead of the 2050 deadline set by both the IMO and EU.

The marine fuel is being bunkered on UECC’s dual and multi-fuel LNG PCTCs – three of which have battery hybrid capability – under Sail for Change that was launched by UECC last year and currently has participation by automotive giants including Toyota, Ford and JLR.

The company also has on order two multi-fuel LNG battery hybrid newbuild PCTCs due for delivery in 2028 that could be enlisted into the programme.

The overall carbon intensity of the UECC fleet, using the same gCO2e/MJ (grams of CO2 equivalent per megajoule) metric as FuelEU, is calculated at 68 gCO2e/MJ to achieve an interim target of a 25% carbon intensity reduction in 2025, though the company is expected to achieve 57 gCO2e/MJ this year based on its supply plan, according to Nagashima.

This is significantly below the current FuelEU threshold of 89.3 gCO2e/MJ – a 2% reduction from the baseline of 91.16 gCO2e/MJ – and still lower than the threshold of 77.9 gCO2e/MJ from 2035 that is a 14.5% reduction versus the baseline figure.

“The low carbon intensity of our fleet means all of our vessels are expected to gain a C rating or above with the IMO’s Carbon Intensity Indicator (CII)” Nagashima explained.

“It also gives us a significant compliance surplus under FuelEU that can be monetised through the regulation’s pooling mechanism, allowing a great commercial opportunity to offset regulatory costs for customers and eliminate FuelEU surcharges.”

“UECC will continue to accelerate its progress in improving decarbonisation of its fleet by further optimising our fuel mix strategy going forward to incorporate more high-impact fuels as these become viable.”

Photo credit: Titan Clean Fuels
Published: 22 May, 2025