Objective and hypothesis
Oxy-fuel combustion, combustion in the presence of oxygen rather than atmospheric air, stands as a promising carbon capture technology to significantly reduce CO2 emissions from cement production. However, further investigations and demonstration activities are required to mature the oxy-fuel cement process. Thus, the aim of the project is to:
• Mature oxyfuel cement plant technology for full-scale testing.
• Develop an oxyfuel pilot calcination reactor.
• Create digitalisation technologies for CO2 emission-free cement production
Approach
In the first part of the project, the business viability of developments will be validated and benchmarked against competing solutions. In the second part, an oxyfuel pilot will be developed to analyse the gas stream to gauge CO2 separation ease and purity. Additionally, it will be analysed, how temperature uniformity influences calcination in the oxyfuel process, and how fuel-to-oxygen ratio impact product quality. In the third part, the project focuses on process simulation to optimise the oxyfuel cement plant layout, including preheating integration. This includes studying the effects of high CO2 levels on calcination, the influence of oxyfuel conditions on volatile elements, and CO2 flue gas recirculation. Lastly, the effects of CCUS on the supply chain are analysed to ensure a cost-effective, net-zero carbon energy supply and cement production.
Expected impact/output
Cement is a significant global industry, accounting for approx. 8% of current global CO2 emissions. By developing oxyfuel cement technology, the project has potential to contribute to large global CO2 reductions. The project is expected to obtain a fully integrated pilot plant, process knowledge, new design tools and a technical layout, including techno-economic documentation. This information will pave the way for the first large-scale industrial unit and accelerate the decarbonisation of the cement sector. The technology may also provide a basis for the market possibility of upgrading CO2 from cement plants to e.g., methanol.
