Publishable summary: This deliverable focus on the basic technical evaluation of symbiosis option and a study on managerial, business and legal issues via various potential use cases within the industrial area of Linz with the main players voestalpine Stahl Linz GmbH, operating an integrated steel mill and Borealis Agromelamine Linz GmbH an ammonia-based fertilizer production site. A theoretical evaluation of technical options for IS at different TRL was performed with the main objectives to identify technically applicable and economically favorable valorization options of renewable hydrogen. Overriding objectives here concern:
• Evaluation of possible cooperation in the field of gases and energy exchange
• Theoretically explore the substitution potential of actual energy vector demands via renewable hydrogen & synthetic natural gas
• Minimize cost structures for renewable energy supply and storage
• Increase the security of supply for renewable energy provision (predominantly H2) for the on-site productions
• Maximize primary energy efficiency and GHG savings via symbiotic valorization of renewable hydrogen
• Study potential system integration of ammonia-based hydrogen route in chemicals and iron and steel production
The predominant focus is on the potential symbiotic valorisation of renewable hydrogen in general but in order to facilitate the application of the symbiosis case, technical options at different technology readiness levels (TRL) levels like:
• direct renewable hydrogen exchange from existing water electrolysis capacities,
• methanation of SMR and power plant CO2 off-gases to provide natural gas substitute,
• methanation of steel gases for natural gas substitute,
• utilisation of coke oven gas as substitute for H2 in ammonia production,
• (reversible) haber bosch synthesis for H2 storage via NH3 and reconversion
• Utilization of CO2 for downstream production
• process integration of existing and potential new assets
Numerous on-site assessments have been carried out in Task 8.2. A large number of scenarios had to be developed to represent the many possible combinations of plant and energy flows. Executed assessments are used to identify promising options for realization and relevant dimensions in terms of technical, economic and managerial dimensions are elaborated within a specific task force formed by partners of the CORALIS follower case Linz (BAM, VAS, EI-JKU, K1-MET). Therefore several meetings and workshops have been realized in order to develop the industrial symbiosis case, to launch different activities and to establish recurrent meetings that allow smooth communication within the industrial partners in Linz. Form the first meeting in November 2020 to the meetings in summer 2022 all potential use cases were developed, discussed and refined.