thyssenkrupp debuts CI4C Catch4Climate Pure Oxyfuel plant in Mergelstetten
- Industrial‑scale demonstration of Pure Oxyfuel operating at the CI4C Catch4Climate site in Mergelstetten.
- Project cost exceeds €120 million and includes a dedicated kiln line with ~450 tonnes clinker per day capacity.
- Pure Oxyfuel replaces air with oxygen in the kiln to increase CO₂ concentration and enable capture of up to 95% of emissions, including calcination CO₂.
- Technology and project responsibilities move to thyssenkrupp Calvion for further development, scale‑up and commercialization.
Project and scope
The CI4C (Cement Innovation for Climate) Catch4Climate Pure Oxyfuel plant in Mergelstetten has been officially inaugurated as a semi‑industrial demonstration facility for carbon capture in cement production. The installation includes a dedicated kiln line with a capacity of around 450 tonnes of clinker per day and was realized under the lead of thyssenkrupp Polysius together with consortium partners.
Investment and role
The facility was built with an investment of more than €120 million and serves as a platform for research, validation and further development of oxyfuel capture in cement clinker production.
Technology and performance
The Pure Oxyfuel process replaces ambient air with pure oxygen in the clinker burning process, increasing CO₂ concentration in the exhaust stream and enabling capture of nearly 95% of CO₂ emissions, including unavoidable process emissions from limestone calcination.
Next steps and industry context
thyssenkrupp Polysius led engineering and execution; the Pure Oxyfuel technology will be advanced, scaled and commercialized within thyssenkrupp Calvion to support deployment across cement and other hard‑to‑abate industries. The project is presented as a milestone toward deep decarbonization of a sector responsible for a large share of industrial CO₂ emissions.
Source: thyssenkrupp