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Rystad Energy publishes definitive study on marine LNG well-to-tank emissions

Study, commissioned by SEA-LNG finds that the global well-to-tank emissions intensity for LNG bunkering fuel in 2024 is 13.9g.

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Independent research and energy intelligence firm Rystad Energy on Wednesday (3 September) published the results of a landmark study on the greenhouse gas (GHG) emissions from the LNG bunker supply chain, commissioned by SEA-LNG. 

This is the most accurate and up-to-date certified data on LNG as a marine fuel designed to help guide the International Maritime Organization’s (IMO’s) Net-Zero Framework and future fuel policy. 

The implications for policy makers developing regulations to decarbonise shipping resulting from this study are:

  • Regulations should incentivise participants in the LNG bunker supply chain to continue to reduce GHG emissions, particularly in relation to natural gas production and liquefaction.
  • Policy makers should introduce a process to regularly update WtT default emissions factors used in regulation, in particular those relating to methane emissions.
  • This report highlights that the EU WtT default of 18.5 gCO2e/MJ (in FuelEU Maritime) is too conservative and a lower number is justified.

The study analyses the emissions originating from the five key fuel lifecycle stages: upstream, transportation & processing, liquefaction, shipping, and distribution & bunkering operations. It was conducted in line with the IMO WtT lifecycle analysis guidelines, the Intergovernmental Panel on Climate Change’s (IPCC) AR5 GHG definitions, and is based on asset-specific 2024 data.

The study finds that the global well-to-tank emissions intensity for LNG bunkering fuel in 2024 is 13.9g CO2e/MJ (LHV). Carbon dioxide dominates global WtT emissions, responsible for 84% of emissions. Carbon dioxide emissions were most prevalent in the liquefaction stage, responsible for 99% of the stage’s 5.9 g CO2e/MJ.  

Methane emissions were responsible for 16% of total WtT emissions, equivalent to 2.2 g CO2e/MJ. They were most prevalent in upstream gas production lifecycle stage, responsible for 38% of total emissions from that stage.

On a global basis, upstream gas production and liquefaction were responsible for the majority of bunker supply chain emissions at 30% and 43% respectively. Consequently, these two stages should be the focus for most future decarbonisation efforts. From the upstream perspective, methane mitigation is best poised to deliver the greatest emissions reduction benefits. Improvements in liquefaction emissions have been observed over recent years, tied to greater utilisation of more efficient technologies. It is likely this trend will continue when coupled with key electrification projects using renewable energy such as hydro and solar power.

With around 95% of vessels still powered by oil-based marine fuels, LNG represents the leading alternative and already accounts for nearly 20% of the vessel orderbook. As the industry transitions toward net-zero and prepares for a rapidly expanding fleet of LNG-fuelled vessels, understanding the real-world lifecycle emissions of LNG is critical to shaping effective regulation and guiding future investment decisions.

Results also show wide variation between regions and cargoes, reflecting differences in gas sources, liquefaction technologies, and shipping distances. In some cases, emissions intensities differed by as much as 6.6 g CO2e/MJ, highlighting that a single global average does not capture the full picture and risks leading to poorly informed regulatory choices.

Patrick King, Vice President Emissions Research, Rystad Energy, said: “Our analysis is based on asset-level data that ties specific gas fields to liquefaction facilities. This approach, supported by satellite-detected methane plume data and reported asset information, gives a more accurate picture of the LNG actually used for bunkering, rather than relying on outdated or overly broad averages.”

Steve Esau, Chief Operating Officer of SEA-LNG, said: “Policymakers must create regulations that reflect the true carbon intensity of marine fuels, rewarding reductions across the supply chain. Marine regulators should incentivise participants in the LNG bunker supply chain to continue to reduce GHG emissions.”

Peter Keller, Chairman of SEA-LNG, concluded: “This landmark report sets the high standards the IMO should demand on such a key topic as alternative fuel emissions and performance within the Net-Zero Framework. Decisions must be based on real and recent data or risk undermining the significant progress already made along the practical and realistic LNG pathway to decarbonisation.”

Note: The Key Findings Document can be found here, and the full Rystad Energy LNG well-to-tank emissions analysis here.

 

Photo credit: Shaah Shahidh on Unsplash
Published: 5 September, 2025

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Alternative Fuels

Yang Ming orders six LNG dual-fuel, ammonia-ready containerships from Hanwha Ocean

Each of the six new vessels will have a capacity of up to 13,650 TEU and feature LNG dual-fuel propulsion and Ammonia Fuel Ready specifications.

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Yang Ming orders six LNG dual-fuel, ammonia-ready containerships from Hanwha Ocean

Taiwanese shipping firm Yang Ming Marine Transport Corporation (Yang Ming) and South Korean shipbuilder Hanwha Ocean on Wednesday (2 September) signed a shipbuilding contract for six 13,000 TEU class LNG dual-fuel container vessels. 

The contract was signed by Dr. Chuck Tsai, Chairman of Yang Ming, and Mr. Charles Kim, CEO of Hanwha Ocean. The vessels are scheduled for delivery between 2028 and 2029. 

They will complement Yang Ming’s existing fleet of 10,000+ TEU vessels and serve as key vessels on East-West services, with deployment flexibility across trade lanes connecting Asia with the East and West Coasts of North America, South America, and the Mediterranean. 

Each of the six new vessels will have a capacity of up to 13,650 TEU and feature LNG dual-fuel propulsion and Ammonia Fuel Ready specifications.

“As Yang Ming transitions toward net-zero emissions, LNG provides a relatively mature and economically viable alternative fuel solution, capable of reducing greenhouse gas emissions by approximately 20%,” the company said. 

“At the same time, ammonia can serve as a carbon-free fuel by utilising converted LNG storage facilities, while offering relatively lower conversion costs and comparatively well-developed supply chains and infrastructure. The Ammonia Fuel Ready design will therefore provide Yang Ming with greater flexibility in responding to increasingly stringent international regulations on greenhouse gas emissions.”

In addition, the vessels will be equipped with Type B LNG fuel tanks with a design pressure of 1.0 bar to enhance the safety and efficiency of LNG operations, together with a range of energy-saving technologies, including Wind Shields, Rudder Bulbs, Pre-Swirl Stators, and Shore Power Systems. Smart ship technologies and cybersecurity protection features will also be incorporated to enhance operational efficiency, safety, and reliability while effectively reducing fuel consumption and greenhouse gas emissions.

Deliveries under Yang Ming’s next-generation fleet optimization plan commenced earlier this year. By 2030, a total of 24 new vessels are expected to enter service. 

This includes 18 LNG dual-fuel vessels—comprising five 15,500 TEU, seven 16,000 TEU, and the six 13,000 TEU vessels under this contract—alongside six 8,000 TEU methanol dual-fuel-ready ships. 

 

Photo credit: Yang Ming Marine Transport
Published: 4 September, 2026

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Alternative Fuels

LR, China’s MARIC unveil tanker concept ready for three future bunker fuels

Both secured AiP for a new 114,000 DWT product and crude oil tanker designed to accommodate future conversion to LNG, methanol or ammonia.

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LR, China’s MARIC unveil tanker concept ready for three future bunker fuels

Lloyd’s Register (LR) and the Marine Design and Research Institute of China (MARIC) on Thursday (3 September) have secured Approval in Principle (AiP) for a new 114,000 DWT product and crude oil tanker designed to accommodate future conversion to LNG, methanol or ammonia.

Announced at SMM 2026, the concept addresses one of the biggest investment challenges facing shipping today: the need to develop vessels and capabilities that can support a range of alternative fuel options and pathways as technologies, infrastructure and regulations evolve.

While LNG is already a mature fuel pathway, methanol and ammonia remain at an earlier stage of development, with questions around global fuel availability, infrastructure development, economics and long-term adoption.

The 114,000 DWT tanker concept has been designed as a product and crude oil carrier that can accommodate future conversion to LNG, methanol or ammonia as technologies, regulations and fuel supply chains mature. By incorporating conversion readiness at the design stage, the concept aims to reduce future retrofit complexity and provide owners with greater confidence when planning long-term fleet investments.

The design concept was reviewed against LR’s July 2026 class rules and regulations, including requirements relating to ships using gases and other low-flashpoint fuels, alongside relevant IACS Common Structural Rules for oil tankers. Final classification and statutory approval remain subject to full compliance with all applicable rules and regulations.

Theo Kourmpelis, Global Business Director for Tankers, Lloyd’s Register, said: “Shipowners are being asked to make major investment decisions today despite continued uncertainty around which fuels will dominate in the decades ahead. Alternative fuel solutions each offer potential pathways to compliance, but fuel infrastructure, regulation and economics continue to evolve at different speeds around the world.

“Designs that preserve flexibility will be critical in helping owners manage risk while preparing for multiple future scenarios.”

Si Nan, Marine & Offshore Marketing Department Vice Director, MARIC, said: “As the industry explores different decarbonisation pathways, shipowners need vessel designs that can adapt alongside technological and regulatory developments. This concept was developed specifically to provide greater fuel flexibility and long-term resilience, allowing owners to respond to changing market requirements without being locked into a single fuel strategy.

“Receiving Approval in Principle from Lloyd’s Register is an important milestone that validates the design concept and supports its future development.”

 

Photo credit: Lloyd’s Register
Published: 4 September, 2026

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Alternative Fuels

DNV: Alternative-fuelled vessel orders hit highest monthly level since October 2024

LNG-fuelled vessels accounted for the vast majority of August activity while the strong summer performance marked a significant acceleration in ordering activity after a relatively slow start to the year.

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DNV: Alternative-fuelled vessel orders hit highest monthly level since October 2024

Latest data from classification society DNV’s Alternative Fuels Insight (AFI) platform alternative-fuelled vessel ordering was strong in August, with 52 new vessels added to the platform.

This is the highest monthly total since October 2024 and follows another active month in July, when 47 vessels were added to the database.

LNG-fuelled vessels accounted for the vast majority of August activity, with 46 orders recorded. The container segment led the way with 30 orders, while the car carrier segment contributed a further 12 LNG-fuelled vessels. In addition, four ethanol-fuelled bulk carriers and two hydrogen-powered bulk carriers were added during the month, as well as one LNG bunker vessel.

The strong summer performance marked a significant acceleration in ordering activity after a relatively slow start to the year. In total, 242 alternative-fuelled vessel orders have been placed in the first eight months of 2026, representing a 27% increase compared with the same period in 2025.

LNG remains the dominant fuel choice, accounting for 63% of all alternative-fuelled vessel orders registered so far this year. Container vessels represent the largest share of these LNG orders (59%), followed by car carriers (30%).

Jason Stefanatos, Global Decarbonization Director at DNV Maritime, said: “The past two months have been particularly strong for alternative-fuelled vessel ordering, with August recording the highest monthly total we’ve seen since October 2024. This has helped lift year-to-date orders to a level well above the same period last year.

“LNG remains the leading fuel choice, driven largely by activity in the container and car carrier segments. These sectors have been among the earliest adopters of alternative fuels, supported by predictable liner operations and increasing demand from cargo owners to reduce emissions across supply chains. 

“For many owners, LNG offers a combination of emissions reductions, fuel availability and future flexibility while the longer-term fuel landscape continues to evolve. 

“At the same time, the latest figures include orders for ethanol- and hydrogen-fuelled vessels, highlighting that owners continue to explore a range of decarbonization pathways. Different segments are making different fuel choices, but the overall level of activity demonstrates continued investment in lower-emission shipping.”

Screenshot 2026 09 04 at 12.29.26 PM Screenshot 2026 09 04 at 12.29.36 PM

 

Photo credit: DNV
Published: 4 September, 2026

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