Bulletin

25th November 2025

Policy Bulletin 007: CO2 Emission Reduction Technologies for Shipping

Maritime policy bulletin 007 covers CO2 emission reduction technologies for shipping.

In recent years maritime shipping has emitted approx. one gigatonne of carbon dioxide (CO2) per annum. Based on current trends this is projected to increase 150-250% by 2050, but the International Maritime Organisation has set targets of 30% reduction by 2030 and net-zero by 2050.

This work reviewed the potential for different emission reduction technologies to reach those targets.

This bulletin is based on a recent publication by Dr Sina Fadaie, Professor Jean-Baptiste R. G. Souppez and Professor Patricia Thornley titled A systematic review of technologies, measures, and CO2 emission reduction potential for maritime transport decarbonisation.

To download the full policy bulletin, please click the download button above.

To read other bulletins, please see: Resources – UK National Clean Maritime Research Hub

Bulletin

24th September 2025

Download Bulletin

Policy Bulletin 006: Regional Ports – economic and emissions advantages

Maritime policy bulletin 006 covers the economic and emissions advantages of regional ports.

Ports and shipping are subject to increasing pressure to decarbonise. This provides opportunities to reconsider shipping routes and to enhance port competitiveness. This bulletin provides an overview of an economic and environmental impact assessment of rerouting Asia-Europe deep sea container ships via the Port of Liverpool as a case study.

The findings could support a place-based policy strategy to promote the use of regional ports in deep-sea container shipping. This would lead to lower logistics costs and lower emissions contributing to achieving national decarbonisation targets.

This bulletin is based on a recent publication by Prof. Dong-Ping Song titled Rethinking Routes: The Case for Regional Ports in a Decarbonizing World.

To download the full policy bulletin, please click the download button above.

To read other bulletins, please see: Resources – UK National Clean Maritime Research Hub

Bulletin

3rd September 2025

Download Bulletin

Policy Bulletin 005: Wind Assisted Ship Propulsion for Decarbonisation

Maritime policy bulletin 005 covers Wind Assisted Ship Propulsion for Decarbonisation.

A key focus of maritime decarbonisation is on alternative fuels but availability, costs,logistical and safety concerns remain a barrier to adoption. Wind propulsion, a historically proven and readily available technology, is now being adopted in new innovative ways to significantly reduce greenhouse gas (GHG) emissions. This bulletin summarises the state of the art and policy challenges in promoting wind-assisted ship propulsion.

This bulletin is based on a recent publication by Mr Jiajie Huang and Prof. Jean-Baptiste Souppez titled State of the Art in Wind Assisted Ship Propulsion for Maritime Decarbonisation and Sustainable Shipping: A Systematic Review.

To download the full policy bulletin, please click the download button above.

To read other bulletins, please see: Resources – UK National Clean Maritime Research Hub

Bulletin

13th July 2025

Download the Bulletin

Policy Bulletin 004: Scrubber investment and market prices

Maritime policy bulletin 004 covers scrubber investment and market prices.

The International Maritime Organisation (IMO) introduced in 2020 a regulation restricting sulphur shipping emissions to 0.5%. Rather than purchasing more expensive low sulphur fuels, a scrubber can be installed on ships to meet this regulation with conventional fuel. Scrubber installation is a shipping technology that has high capital expenditure but enhances profitability. This is due to fuel cost savings when operating the vessel or higher freight income when leasing it out. Volatile fuel prices and freight rates mean that making such investment decisions is challenging.

This bulletin is based on research on Scrubber Installation in Shipping by Dr. Yao Shi and Dr. Ioannis Moutzouris of City St. Georges, University of London.

To download the full policy bulletin, please click the download button above.

To read other bulletins, please see: Resources – UK National Clean Maritime Research Hub

Bulletin

10th July 2025

Download the Bulletin

Policy Bulletin 003: The economics of shipping decarbonisation

Maritime Policy Bulletin 003 explores the economics of shipping decarbonisation, offering financial insights into how effectively the maritime industry is aligning environmental objectives with economic performance.

Drawing on recent research by Dr. Yao Shi and Dr. Ioannis Moutzouris of City St. Georges, University of London, this bulletin presents a summary of allocation efficiency across 14 vessel types. It highlights key findings on carbon efficiency and provides financial perspectives that inform actionable policy recommendations aimed at accelerating the adoption of greener fuels.

To download the full policy bulletin please click the download button above.

To explore other bulletins, visit: Resources – UK National Clean Maritime Research Hub

Bulletin

20th January 2025

Download the Bulletin

Policy Bulletin 002: Microleaks-No-Burst Safety Technology

Maritime policy bulletin 002 covers safe hydrogen storage, which will be critical across all transport vectors as well as maritime and in refuelling stations.

This summary of the innovative Microleaks-No-Burst technology for hydrogen storage developed by our researchers Vladimir Molkov, Dmitry Makarov, & Sergii Kashkarov is a solution that would meet stringent safety requirements exceeding that for fossil fuels!

To download the full policy bulletin please click the download button above.

To read more on advancing scale-up of maritime fuels and their safe use please see: Resources – UK National Clean Maritime Research Hub

For bulletin 1 please see: Policy Bulletin 001: Eco-ships investment and price differentials – UK National Clean Maritime Research Hub

Bulletin

29th October 2024

Download the Bulletin

Policy Bulletin 001: Eco-ship investment and price differentials

There are insufficient financial incentives to stimulate eco-ship investment (where engines are more fuel efficient) risking missing emissions reduction targets.

In this research by Clean Maritime Research Hub’s Dr Ioannis Moutzouris and colleagues the price differentials are explored using data over recent years.

Policy recommendations include the need for:

Clarity and certainty around market-based measures and alternative fuels regulations
Green finance options to encourage investment in eco-ships
Fossil fuel levies to discourage conventional ship use and encourage eco-ship investment

You may also be interested in Determinants of the price premium for eco vessels – UK National Clean Maritime Research Hub

Resource Category: Bulletin

Policy Bulletin 007: CO2 Emission Reduction Technologies for Shipping

Related reading

A systematic review of technologies, measures, and CO2 emission reduction potential for maritime transport decarbonisation

Experimental study of liquid ammonia injection timing in rapeseed methyl ester dual injection engine

Performance, emissions, and lubricant oil analysis of a marine diesel engine powered by raw Schizochytrium sp. and its blends

Policy Bulletin 006: Regional Ports – economic and emissions advantages

Related reading

Policy Bulletin 007: CO2 Emission Reduction Technologies for Shipping

A systematic review of technologies, measures, and CO2 emission reduction potential for maritime transport decarbonisation

Experimental study of liquid ammonia injection timing in rapeseed methyl ester dual injection engine

Policy Bulletin 005: Wind Assisted Ship Propulsion for Decarbonisation

Related reading

Policy Bulletin 007: CO2 Emission Reduction Technologies for Shipping

A systematic review of technologies, measures, and CO2 emission reduction potential for maritime transport decarbonisation

Experimental study of liquid ammonia injection timing in rapeseed methyl ester dual injection engine

Policy Bulletin 004: Scrubber investment and market prices

Related reading

Policy Bulletin 007: CO2 Emission Reduction Technologies for Shipping

A systematic review of technologies, measures, and CO2 emission reduction potential for maritime transport decarbonisation

Experimental study of liquid ammonia injection timing in rapeseed methyl ester dual injection engine

Policy Bulletin 003: The economics of shipping decarbonisation

Related reading

Policy Bulletin 007: CO2 Emission Reduction Technologies for Shipping

A systematic review of technologies, measures, and CO2 emission reduction potential for maritime transport decarbonisation

Experimental study of liquid ammonia injection timing in rapeseed methyl ester dual injection engine

Policy Bulletin 002: Microleaks-No-Burst Safety Technology

Related reading

Policy Bulletin 007: CO2 Emission Reduction Technologies for Shipping

A systematic review of technologies, measures, and CO2 emission reduction potential for maritime transport decarbonisation

Experimental study of liquid ammonia injection timing in rapeseed methyl ester dual injection engine

Policy Bulletin 001: Eco-ship investment and price differentials

Related reading

Policy Bulletin 007: CO2 Emission Reduction Technologies for Shipping

A systematic review of technologies, measures, and CO2 emission reduction potential for maritime transport decarbonisation

Experimental study of liquid ammonia injection timing in rapeseed methyl ester dual injection engine

Stay in the know