Techno-Ecological Evaluation of Methanol and Acetic Acid Production from Steel Mill Off-Gases. A Pathway Towards Carbon Capture and Utilization in the Steel Industry

Conventional steel production Conventional production with blast furnace route ▪ 2/3 of German steel production 1) ▪ Coal as energy carrier ▪ Gases with different amounts and concentrations ▪ Off-Gases: COG, BFG and BOFG ▪ Containing: CO, CO 2 , H 2 , N 2 , CH 4 … ▪ Today (reference state): ▪ Power plants and/or internal utilization (steam, heat…) →Subsequently all CO 2 is emitted in the environment 07/03/2024 © Fraunhofer 2 → Leads to 7% of CO 2-emissions in Germany (~50 Mt CO2 /a) 2)