Abstract

It is established that iron is oxidized by supercritical water (SCW) with the formation of H2 and nanoparticles of iron oxides (Fe3O4, FeO, and γ-Fe2O3). The kinetics of H2 production and iron oxidation has been studied by SCW injection at T = 673, 723, 773, 823, and 873 K into a reactor with iron particles. Data of X-ray diffraction and transmission electron microscopy show that the phase composition and morphology of synthesized oxide nanoparticles depend on the SCW temperature.

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