Determination of Fe2+/Fe3+ mole ratio based on the change of precursor lattice parameters of wustite based iron catalysts for the ammonia synthesis

• Autorzy: Jurkowski Artur , Lendzion-Bieluń Zofia

Identyfikatory

DOI

10.2478/pjct-2019-0029

• Języki publikacji: EN

Abstrakty

EN

In the presented article, oxide forms of iron catalysts with the wustite structure and with a R = Fe²⁺/Fe³⁺ molar ratio in the range from 3.78 to 8.16 were investigated. The chemical composition of the tested catalyst precursors was determined by inductively coupled plasma optical emission spectrometry (ICP-OES). The X-ray diffraction (XRD) technique was used to determine the phase composition and location of reflections characteristic of the Fe_1−xO phase. The molar ratio of iron ions R = Fe²⁺/Fe³⁺ was determined by manganometric titration. The distribution of promoters in the structure of iron catalyst precursors with different R = Fe²⁺/Fe₃₊  ratio was determined by a selective etching method. The dependence of the lattice parameter ao value in the crystal structure Fe_1−xO on the molar ratio R = Fe²⁺/Fe³⁺ was determined. On the basis of the determined dependence, R can easily be calculated in catalyst precursors of the wustite structure.

Słowa kluczowe

EN

wustite ammonia catalyst; XRD technique; manganometry; wustite lattice parameter

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2019
• Tom: Vol. 21, nr 3
• Strony: 48--52
• Opis fizyczny: Bibliogr. 14 poz., rys., tab.

Twórcy

autor

Jurkowski Artur

• West Pomeranian University of Technology, Faculty of Chemical Technology and Engineering, Institute of Inorganic Chemical Technology and Environment Engineering, Szczecin, ul. Piastów Ave. 42, 71-065 Szczecin, Poland

autor

Lendzion-Bieluń Zofia

• West Pomeranian University of Technology, Faculty of Chemical Technology and Engineering, Institute of Inorganic Chemical Technology and Environment Engineering, Szczecin, ul. Piastów Ave. 42, 71-065 Szczecin, Poland

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).