Reduction Study of Iron-Alumina Binary Oxide Fe2-xAlxO3

• Autorzy: Jóźwiak W. K. , Maniecki T. P. , Mierczyński P. , Bawolak K. , Maniukiewicz W.
• Języki publikacji: EN

Abstrakty

EN

The comparative study of iron-aluminum binary oxides Fe2-xAlxO3 (where x = 2/3, 1, 4/3) reduction behavior was investigated and the obtained bi-oxides were characterzed by TPR, TG-DTA, BET and XRD methods. In hydrogen atmosphere three step reduction path way for iron-aluminum binary oxide was found. Such reduction behavior appeared reasonably analogical to that characteristic of hematite type iron(III) oxide reduction 3Fe2O3 rightwards arrow 2Fe3O4 rightwards arrow 6FeO rightwards arrow 6Fe. The reduction for unimolar bi-oxide Fe2-xAlxO3 (x = 1) can be expressed in following way: 4FeAlO3 rightwards arrow 2Fe2AlO4 rightwards arrow 2FeAl2O4 + 2Fe rightwards arrow 4Fe but the last step of reduction was not accomplished below 1000°C. In air FeAlO3 bi-oxide decomposes above 1300°C, whereas exothermal dissociation 2FeAlO3 rightwards arrow alfa-Al2O3 and alfa-Fe2O3 above 770°C was con firmed in argon atmosphere.

Słowa kluczowe

EN

iron oxide; iron-alumina binary oxide; binary oxide; TPR-H2

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2009
• Tom: Vol. 83, nr 12
• Strony: 2153--2162
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Jóźwiak W. K.

autor

Maniecki T. P.

autor

Mierczyński P.

autor

Bawolak K.

autor

Maniukiewicz W.

• Technical University of Lodz, Institute of General and Ecological Chemistry, 90-924 Łódź, Żeromskiego 116, Poland,

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