Calix Limited is pleased to announce that a project led by Windship Technology Limited in partnership with Leilac, Calix’s 93% owned subsidiary focused on the decarbonisation of cement and lime, has been awarded £5m (~AU$8.7m) by Innovate UK to demonstrate a novel, low-cost route to zero carbon shipping.
The Project combines renewably powered propulsion and a lime-based carbon capture solution for remaining emissions from conventional diesel engines. As part of the funding, Leilac will receive a grant of £1m (~AU$1.75m1) to demonstrate the delivery of lime to an exhaust gas scrubber for CO2 capture.
In welcoming the announcement, Calix Managing Director and CEO, Phil Hodgson said, “We are delighted to be partnering with Windship, with the support of the UK Government, to develop a novel decarbonisation approach that combines highly innovative technologies developed in Australia and the UK.”
Windship Technology CEO, Graham Harvey said,
“We are absolutely delighted with this funding for ourselves and our project partners. Given the significant financial support announced today, the Department for Transport and Innovate UK believe this technology can be a key driver in the clean shipping revolution, and we are proud to be playing our part in the decarbonisation of the shipping industry.”
Windship and Leilac are partnering to develop an innovative wind propulsion and carbon capture system that has the potential to offer a low-cost route to low and zero emissions shipping. Together, Windship and Leilac’s technologies can enable approximately 50% of the ships power to be provided by renewable energy and emissions from the remaining conventional fuel requirements captured by zero emissions lime. Integration of the carbon capture system with the ship’s engines can enable waste heat recovery from the capture reaction, further reducing fuel demand. This unique combination of technologies has the potential to deliver a highly economical approach to elimination of emissions from shipping.
Windships’ auxiliary power systems use wind propulsion provided by wind rigs, each of which consist of three vertically arranged solid sails. The innovative design provides high-power density and a low centre of effort, and therefore minimal impact on vessel stability. Three triple wing installations can provide sufficient thrust to sail an 80,000 deadweight tonne (DWT) ship without requiring engine power for 60-70% of the journey along typical trade wind routes, dramatically reducing CO2 emissions compared with standard operating conditions.
For manoeuvring in port, handling in storm conditions or for when wind power cannot be guaranteed, ships must also be fitted with engines. Whilst in future these engines may run off zero emissions fuels, the existing fleet is expected to continue to use diesel for several decades.
Windship systems can be installed on vessels with a flat deck above their cargo, including tankers, bulkers, and LNG tankers.
Lime is a highly effective sorbent for the capture of CO2 and can be used in a carbon capture system for the abatement of emissions from conventional diesel engines. For this solution to provide a net reduction or elimination of emissions, the lime used for capture must be produced with low or zero carbon emissions, using shore-based decarbonisation of the lime.
Leilac’s patented technology can produce low emissions lime by efficiently capturing the unavoidable process CO2 emissions released from limestone, without additional chemicals or processes. Leilac’s technology is compatible with clean energy sources, such as hydrogen and electricity, and also alternative fuels, enabling flexible and economical pathways for the production of zero emissions lime and cement. Leilac’s technology is proven at pilot scale, including through its pilot plant, Leilac-1, that has been in operation since 2019 with a capture capacity of 25,000 tonnes of CO2 per year. A demonstration plant, which aims to prove a low-cost module with a capture capacity of 100,000 tonnes of CO2 per year is due to open in 2024, paving the way for commercialisation of the technology at any scale.
For shipping, the decarbonised lime will be transferred to the relevant marine vessel, where the shipborne carbon capture process is applied. This system is compatible with a wide range of ship types, including tankers, container ships and cruise liners. It is retrofittable, fuel agnostic, and can be simply scaled to meet the decarbonisation ambitions of each ship. The adoption of lime as a sorbent for ships can also significantly expand the market for low and zero emissions lime.
Noting the benefits of research and development already undertaken by the cement and lime industries, Leilac CEO, Daniel Rennie said,
“This project marks a significant step in developing a potential route for the efficient and low-cost decarbonisation of the shipping industry. Marine shipping is a particularly hard-to-abate sector, and the very strong synergies that can be made from leveraging the large-scale industrial decarbonisation efforts in the lime and cement industries – combined with the innovative renewable approach by Windship – is an exciting development.”
Dr Hodgson continued, “Calcium looping for carbon capture with low emissions lime is an exciting application with significant potential, and we look forward to developing this technology further with the support of our partners.”
The Project, led by Windship Technology Limited, will use a new patented solid wing sail technology in conjunction with a lime carbon capture system to demonstrate a route to zero emissions for ships fitted with conventional diesel engines. The Project aims to demonstrate the low-cost potential of the proposed decarbonisation solution for shipping and pave the way for zero emissions lime to be used for reducing or eliminating emissions from conventional diesel-powered vessels.
The key objective of the Project is to design, develop, build and demonstrate a novel drive train system consisting of a single powerful wind propulsion device, working together with a trial carbon capture system to pave the route to zero emission propulsion for bulkers and tankers. This will be installed and trialled on a 15,000DWT bulker. The shipborne carbon capture system will ultimately be designed to use highly reactive low emissions intensity lime, produced in an on-shore Leilac reactor, to capture CO2 from the ship’s exhaust gases.
International shipping is responsible for ~2% of global CO2 emissions. The International Maritime Organization has an objective to reduce greenhouse gas emissions by at least 50% by 2050, compared with a 2008 baseline. Accounting for the projected growth of the shipping industry during this time, achieving this goal will require a reduction in emissions of ~80% based on current levels.
Future development and adoption of sustainable transport fuels, such as hydrogen or methanol, together with the required supporting infrastructure, may enable low carbon fuel alternatives for the shipping industry.
When methanol produced with renewable energy and captured CO2 from industry is used as a fuel, such as in the process described in the recent HyGATE project announcement, of which Calix is a consortium member, the combination with the technology being developed by this Project can deliver net negative emissions from shipping.
The Project is part of the Clean Maritime Demonstration Competition Round 3 (CMDC3), which was announced in September 2022, funded by the Department for Transport (DfT) and delivered in partnership with Innovate UK. As part of the CMDC3, the Department allocated £60m to 19 flagship projects supported by 92 UK organisations to deliver real world demonstration R&D projects in clean maritime solutions. Projects will take place in multiple locations around the UK from as far north as the Shetland Isles and as far south as Cornwall.
The CMDC3 is part of the UK Shipping Office for Reducing Emission’s (UK SHORE) flagship multi-year CMDC programme. In March 2022, the Department announced the biggest government investment ever in our UK commercial maritime sector, allocating £206m to UK SHORE, a new division within the Department for Transport focused on decarbonising the maritime sector. UK SHORE is delivering a suite of interventions throughout 2022-2025 aimed at accelerating the design, manufacture and operation of UK-made clean maritime technologies and unlocking an industry-led transition to Net Zero.
 Based on an exchange rate of 1GBP = 1.75 AUD, as at 15 February 2023
 Calix part of consortium awarded funding to manufacture sustainable fuels from captured CO₂