A5063751852- Iron and Steelmaking Processes
- Thermal and Kinetic Analysis
- Catalysts for Methane Reforming
- Catalytic Processes in Materials Science
- Nuclear Materials and Properties
- Metallurgical Processes and Thermodynamics
- Thermochemical Biomass Conversion Processes
- Catalysis and Hydrodesulfurization Studies
- Iron oxide chemistry and applications
- Radioactive element chemistry and processing
- Minerals Flotation and Separation Techniques
- Graphite, nuclear technology, radiation studies
- Electrohydrodynamics and Fluid Dynamics
- Mineral Processing and Grinding
Karlsruhe Institute of Technology
2023-2025
In recent years, metal fuels were discussed as a contribution to meeting the challenges of energy transition climate-friendly, sustainable economy. One material system with high potential store and release large amount is iron powder its reducible solid product oxide powder. this study, evolution particle morphology during single combustion in laminar flow reactor analyzed. Partially oxidized particles are sampled at different heights above burner their internal morphological structure...
The combustion of metal fuels as energy carriers in a closed-cycle carbon-free process is promising approach for reducing CO2 emissions the sector. For possible large-scale implementation, influence conditions on particle properties and vice versa has to be well understood. In this study, different fuel–air equivalence ratios morphology, size degree oxidation an iron–air model burner investigated by means small- wide-angle X-ray scattering, laser diffraction analysis electron microscopy....
Iron is a very promising candidate for the use as chemical energy carrier. For application it crucial to understand reaction behavior of iron and oxide powders in micrometer range. Recent evidence shows that oxidation differs from well understood slab oxidation. As reactions are fast, approaches using quantitative in-situ analytical methods desired. Herein, we follow powder reduction Fe-57 Mössbauer spectroscopy X-ray diffraction. A time resolution 30 min achieved with even natural isotopic...
Abstract The carbon‐free chemical storage and release of renewable energy is an important task to drastically reduce CO 2 emissions. high specific density iron its recyclability makes it a promising material. Energy by oxidation with air can be realized the combustion micron‐sized powders in retro‐fitted coal fired power plants fixed‐bed reactors under milder conditions. An experimental parameter study powder was conducted based on thermogravimetric analysis combination wide‐angle X‐ray...
The Cover Feature illustrates the cyclic process for using iron powder as a carbon-free energy carrier. Energy release occurs through oxidation of with air, resulting in formation oxides. Conversely, storage is achieved reduction oxides by green hydrogen. This study primarily investigates behavior powders under mild conditions and examines impact operations. Detailed insights into processes were obtained thermogravimetric analysis, wide-angle X-ray scattering (WAXS), Mössbauer spectroscopy,...
Abstract Conventional routes for the production of formaldehyde rely on use methanol and air, with presence catalysts such as silver or mixed‐metal oxides. These processes are highly energy intensive therefore raise concerns in terms cost‐effectiveness environmental impact. In that respect, sodium compounds more favorable direct dehydrogenation to water‐free formaldehyde. A method is presented coproduction hydrogen anhydrous – both valuable products laboratory scale, a particular focus...