A recent joint study, by classification society RINA, Oceania Marine Energy and Pilbara Clean Fuels (PCF), reveals that well-to-wake emissions in the Pilbara-to-Asia iron ore export trade route could be reduced by over 90% by 2050 through the use of LNG as fuel.
In November 2023 PCF, Oceania and RINA signed an MoU to collaborate on studies to define the commercial and emissions reduction benefits their combined concepts could deliver to ship owners and charterers for the Pilbara to Asia dry-bulk minerals export trade route. The joint study has now been completed.
Key developments resulting from the collaboration are that:
- PCF is pursuing the development of an electrified LNG plant in Port Hedland, Western Australia aimed at producing low-carbon LNG marine bunker fuel;
- Oceania is developing a marine fuel bunkering business using purpose-designed LNG refuelling vessels to be chartered from Kanfer Shipping, Norway;
- RINA has developed an innovative concept for an LNG-fuelled 209,000 dwt Newcastlemax dry bulk carrier design incorporating pre-combustion carbon removal and hydrogen production to meet IMO 2050 CII requirements over the ship’s operating life.
The findings from the study are believed to demonstrate an accessible and achievable pathway to net-zero emissions for LNG, on a well-to-wake basis, for international shipping on this trade. The study presents a flexible and commercially attractive IMO-compliant marine fuel strategy to ship owners, operators and charterers amidst competing alternative fuel. It proposes a ‘Green Corridor’ marine fuels solution for the Western Australia to China bulk minerals export trade route.
Western Australia is the world’s largest producer of iron ore, with current production of over 850m tonne/yr, the majority of which is exported from the Pilbara region. The joint study addresses a set of factors which together constitute a pathway to achieving net-zero emissions for this trade route, and for the international shipping industry in general. It concludes that, by implementing a holistic combined systems approach, well-to-wake emissions for the Pilbara to Asia export shipping industry can be reduced by more than 90% by 2050, using fuel and technologies already in use today and that can be implemented to optimise vessel fuelling and operations according to regulatory requirements and business drivers.
The PCF low-carbon LNG plant has the potential to initially produce LNG with emissions of less than 200kg/t of GHG, which can be further reduced to around 50kg/t (and potentially to zero through technology improvements).
LNG bunkering in the Pilbara region offers a substantial voyage optimisation by eliminating the need to deviate to other major bunkering hubs in the region, thus significantly reducing emissions. This also reduces by 25% the emissions associated with transporting LNG over long distances, compared to LNG bunkering in other ports and ensures competitive pricing for LNG.
RINA’s bulk-carrier ship concept features a novel propulsion arrangement which achieves a fuel saving of 12% when running on LNG at current market speeds and offers the charterer greater fuel flexibility and enhanced economic benefits by reducing LNG consumption. This can lead to lower fuel running costs, particularly when compared with traditional fuel oil.
It provides redundancy, significantly reducing the risk of blackout, and does not suffer from known issues like acceleration through engine’s barred speed range. The ship can also harvest benefits from wind propulsion. The proposal is flexible in fuel selection and, most importantly, the use of hydrogen produced on board is on demand. This concept, which produces CO2 that is captured and stored onboard, can be delivered price-competitive as it has been designed to retrofit emissions-reduction equipment in stages to suit the owners’ requirements. The design allows charterers to modify the vessels with modular hydrogen production and carbon capture and storage (CCS) equipment to meet GHG compliance as needed.
The bunker vessel design incorporates a hybrid energy system, including an 8MWh battery, allowing for emission free operation in port. This, alongside the onboard CGR-designed process plant for vapour recovery and re-liquefaction, significantly reduces emissions and enhances operational efficiency.
The CO2 generated from onboard pre-combustion hydrogen production can economically be integrated into the large volume CCS hubs currently being developed in the Pilbara region by various third-party proponents.
The combination of systems and technologies allows LNG-fuelled dry-bulk carriers to significantly reduce emissions today and to comply with the IMO 2023 GHG Reduction Strategy through to 2050.
The study concludes that by implementing this holistic combined systems approach, well-to-wake emissions for the Pilbara to Asia export shipping industry can be reduced by more than 90% by 2050. The reduction of GHG emissions is achieved by progressively decreasing the LNG fuel share to the engines while proportionately increasing hydrogen usage. This allows for staged upgrades over the vessel’s lifetime to comply with the IMO requirements for continuously reducing GHG emissions. The shipowner can decide which path to follow to stay ahead of compliance and competition. All necessary technologies for achieving net zero emissions with LNG as a marine fuel already exist and are in use, marking the first time they have been proposed in combination, demonstrating a positive path to net zero emissions for international shipping.
The joint study is thought to present a significant opportunity for decarbonising shipping in the Pilbara region and beyond, contributing to global efforts to combat climate change.
Image: Bulk carriers at Pilbara (credit: Plbara Port Authority)
