During the demonstration at Ribblesdale, the proportion of fuels in the cement kiln’s main burner was gradually increased to a wholly net zero mix made up of tanker-delivered hydrogen as well as biomass components and glycerine, generated as by-products of other industries. If fully implemented for the whole kiln system, nearly 180,000 tonnes of carbon dioxide could be avoided each year at Ribblesdale alone compared to using fossil fuels, such as coal.
The trial at Ribblesdale follows a BEIS-funded feasibility study in 2019 which demonstrated that a combination of biomass, hydrogen and plasma energy could be used to eliminate 100 per cent of fossil fuel CO2 emissions from cement manufacturing – provided the necessary framework conditions and infrastructure.
The trial which is part of a wider £3.2 million project has been funded by BEIS as part of its Industrial Fuel Switching Competition. Project results will be shared with cement producers and other energy-intensive industries both in the UK and globally as best practice examples, with the aim of spreading and maximising the environmental benefits of the technology.
 The fuel switching trial has used ‘grey’ hydrogen as a proof of concept, which can be substituted for ‘green’ hydrogen in future. At a 100 % climate-neutral mix, the proportion of fuels in the cement kiln was approximately 39 % hydrogen, 12 % meat and bone meal (MBM) and 49 % glycerine.
HeidelbergCement is one of the world’s largest integrated manufacturers of building materials and solutions, with leading market positions in aggregates, cement, and ready-mixed concrete. Around 53,000 employees at more than 3,000 locations in over 50 countries deliver long-term financial performance through operational excellence and openness for change. At the center of actions lies the responsibility for the environment. As forerunner on the path to carbon neutrality, HeidelbergCement crafts material solutions for the future.