Low Carbon Reducing Agents Department

Muster: Name der Abteilung [Nr.3]
CO2-reduction in steelmaking - a hot topic of our research
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In Germany, the industrial sector is the second-highest greenhouse gas emissions contributor after the energy sector. Industrial processes, e.g., in steel, cement, or aluminum industry, which currently utilize coal, coke, or graphite as reducing agents, are difficult to decarbonize. The technological gap and the long-term challenges lie in the realization of cost-effective and energy-efficient production based on alternative reducing agents (CO2-neutral hydrogen and CO2-neutral carbon).

The Department

Industrial CO2 emissions can be divided into two groups:

  • Process-related CO2 emissions from the use of carbon-containing energy sources and other raw materials

  • Direct energy-related CO2-emissions from the use of fuels for the provision of energy, e.g., process heat or electricity (in industrial power plants) and indirect energy-related CO2- emissions from the upstream generation of the electricity used at the industrial site.

In general, these various sources of CO2-emissions require sector-specific approaches and measures for their reduction.

Therefore, the department Low Carbon Reducing Agents investigates options to avoid process-related CO2 emissions by adapting existing technologies  as well as by substituting the emission-causing raw materials.  Separation and subsequent use of CO2 (Carbon Capture and Utilization (CCU)) are examined in cases where CO2-emissions cannot be avoided.

In addition, the research results of the other two departments SVD and HTP of the Institute are incorporated into process development and adaptation. A significant reduction of energy-related CO2 emissions can be achieved by improving the efficiency of energy conversion and utilization, as well as by increasing the fraction of renewable energies used.

Research and development topics of the department Low Carbon Reducing Agents currently comprise:

  • Decarbonization of steel production using renewable “green” hydrogen as a reducing agent

  • CFD simulations to evaluate the achievable conversion rates with alternative reducing agents

  • Production of synthetic solid reducing agents from biomass, including CO2-neutral high-temperature heat from renewable electricity

  • Experimental verification at the component level on a laboratory scale

  • Emission reduction through the utilization of CO2 from coal-fired power plants for the production of synthesis gas, followed by further process steps yielding synthetic fuels and chemical base materials

  • Comparative techno-economic analysis of the decarbonization of industrial processes using gaseous and solid reducing agents

These topics are the department's challenges to assist energy-intensive industries in their quest for sustainable production and to provide suitable low-CO2 key-technologies as part of the energy transition.

Contact

Prof. Dr. Uwe Riedel

Director of the Institute
German Aerospace Center (DLR)
Institute of Low-Carbon Industrial Processes
Walther-Pauer-Straße 5, 03046 Cottbus

Dr.-Ing. Quentin Fradet

Head of Department (act.)
German Aerospace Center (DLR)
Institute of Low-Carbon Industrial Processes
Low Carbon Reducing Agents
Walther-Pauer-Straße 5, 03046 Cottbus