%0 Journal Article
%A Choisez, Laurine
%A Hemke, Kira
%A Özgün, Özge
%A Pistidda, Claudio
%A Jeppesen, Henrik
%A Raabe, Dierk
%A Ma, Yan
%T Hydrogen-based direct reduction of combusted iron powder: Deep pre-oxidation, reduction kinetics and microstructural analysis
%J Acta materialia
%V 268
%@ 1359-6454
%C Amsterdam [u.a.]
%I Elsevier Science
%M PUBDB-2024-01035
%P 119752
%D 2024
%Z Funding: F.R.S.FNRS chargée de recherche mandate (ID 40011141); Walter Benjamin Programme of the Deutsche Forschungsgemeinschaft (project number 468209039); ERC Advanced grant ROC (Grant Agreement No 101054368)
%X Iron powder can be a sustainable alternative to fossil fuels in power supply due to its high energy density and abundance. Iron powder releases energy through exothermic oxidation (combustion), and stores back energy through its subsequent hydrogen-based reduction, establishing a circular loop for renewable energy supply. Hydrogen-based direct reduction is also gaining global momentum as possible future backbone technology for sustainable iron and steel production, with the aim to replace blast furnaces. Here, we investigate the microstructural formation mechanisms and reduction kinetics behind hydrogen-based direct reduction of combusted iron powder at moderate temperatures (400–500 °C) using thermogravimetry, ex-situ X-ray diffraction, scanning electron microscopy coupled with energy dispersive spectroscopy and electron backscatter diffraction, as well as in-situ high-energy X-ray diffraction. The influence of pre-oxidation treatment was studied by reducing both as-combusted iron powder (50 
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001187989800001
%R 10.1016/j.actamat.2024.119752
%U https://bib-pubdb1.desy.de/record/604233