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Scrubbers: A mature platform for asset futureproofing

Embracing proven technology that can bridge the gap between current and future environmental regulations will enable the industry to move forward confidently, says Scott Oh of Wärtsilä Exhaust Treatment.

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Scott Oh, Director, Asia Operations at Wärtsilä Exhaust Treatment, recently shared with Singapore bunkering publication Manifold Times on their success in the current market for scrubbers and recent scrubber sales in Asia as well as elaborates on its CCS-Ready 35MW scrubber:

With the wide and relatively stable spread between high and low sulphur fuels, scrubbers continue to present a favourable economic proposition, and payback time has now reached less than two years for several vessel types. 

These technologies’ role in Global Sulphur Cap compliance is well known. But, today, beyond solely tackling SOx, scrubbers have become a platform from which multiple technologies can work together in the stack and throughout the exhaust chain. This includes tackling NOx emissions by adding selective catalytic reduction systems (SCR) or exhaust gas recirculation systems (EGR) to ensure compliance with MARPOL Tier III requirements. In addition, scrubbers can reduce Particulate Matter (PM) 2.5 levels below even standard land-based requirements and a filter can be applied to capture microplastics. 

Finally, and most importantly, scrubbers can now also be installed in a way that sees them primed and ready for onboard CO2 capture and storage (CCS), making them a futureproofed investment for achieving marine decarbonisation goals in a short timeframe. This has been particularly recognised in Asia and by Asian shipowners, because it is here where Wärtsilä received its first order for CCS-Ready scrubbers in November 2022. This landmark order includes systems for four 8,200 TEU container vessels which will be fitted with Wärtsilä’s CCS-Ready 35MW scrubber in an open loop configuration. 

At its core, CCS-Ready means that Wärtsilä is conducting the requisite engineering and naval architecture at the outset to ensure adequate space for the future installation of a CCS system, as well as incorporating considerations for minimising idle load and optimising utilities, and preparing the control and automation system. 

Owners are looking to future-proof their existing fleet and newbuildings while the regulatory environment is still evolving and at a time when yard space is in high demand. Concurrently, they are taking advantage of higher charter rates, particularly in the container ship market, so for retrofits, minimising off-hire time is critical. They need a partner that has the ability, relationships and experience to cooperate with yards and manage the process from sales to installation. 

A first 2D layout drawing provides owners with an understanding of the scope of the installation and enables onboard space to be reserved. A full technical feasibility study can then be undertaken before or after contract signing. Owners typically make most decisions within the first four weeks after contract signing. This is when the equipment, piping and possible tanks are modelled, and owners may consider their preferences, such as tank locations, to ensure the design process is straightforward.

This phase also includes considerations on how best to futureproof the installation, leaving room for adaptation to CCS or hybrid functionality. The work required to allow for a CCS add-on is mainly done on the drawings at this stage, but some modifications can be made to the scrubber body. Space will need to be reserved above the scrubber and the funnel may need raising a few metres. In some cases, it makes sense to do this as early as possible.

Shipyard involvement is critical. Generally, shipyards should take the input of suppliers and ‘own’ the detailed designs themselves, ensuring a smooth and fast process that avoids confusion during installation. Co-operation between the basic and detailed designer remains important, and a good scrubber manufacturer will act as a link between all parties. In some cases, it is personal relationships and prudent communication skills more than the contract that can ensure positive, timely outcomes.

Wärtsilä has a strong presence in the Asian scrubber market after receiving Type Approval from the China Classification Society (CCS) in 2020. This was achieved when Dalian Shipbuilding Industry ordered a scrubber for the New Treasure, a newbuild VLCC. The vessel was built for Associated Maritime of Hong Kong, part of the China Merchants Energy Shipping (CMES) group, the largest VLCC owner in China.

Owners’ confidence in scrubbers as a technology platform for compliance with IMO goals and the wider decarbonisation picture has increased with advanced scrubber solutions, and by choosing the right partners, they can be confident they will overcome the engineering challenges and remain competitive. 

 

Photo credit: Wärtsilä
Published: 3 August, 2023

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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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