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Hydrogen reduction of MoO3−Fe mixes studied by stepwise differential isothermal analysis

  • Metallurgical Systems and Superconductors
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Abstract

The method of a stepwise differential isothermal analysis (SDIA) has been designed for studies of reduction processes in metallurgical systems. The basis of the method is in multi-parameter control of reaction rate and its use for monitoring temperature, heating rate, and gas-phase composition. In this study hydrogen reduction of MoO3 and its mix with 30% Fe have been carried out using the SDIA technique. During the measurements, TG, DTG, DTA, EGA, and temperature control are carried out. Kinetics parameters were determined and possible reduction mechanism was suggested. The SDIA technique is well suited for these studies.

Zusammenfassung

Zur Untersuchung der Reduktionsprozesse in metallurgischen Systemen wurde eine Methode der stufenweisen Differential-Isothermoanalyse (SDIA) entwickelt. Die Grundlage der Methode besteht in einer Vielfach-Parameterkontrolle der Reaktionsgeschwindigkeit und ihrer Anwendung zur Verfolgung der Temperatur, der Aufheizgeschwindigkeit und der Zusammensetzung der Gasphase. Unter Anwendung von SDIA wurde vorliegend die Wasserstoffreduktion von MoO3 und von MoO3 mit 30% Fe untersucht. Während der Messungen werden TG, DTG, DTA, EGA und Temperaturkontrolle durchgeführt. Die kinetischen Parameter wurden bestimmt und mögliche Reduktionsmechanismen vorgeschlagen. Die SDIA-Methode eignet sich gut für derartige Untersuchungen.

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Gasik, M.M., Ostrik, P.N. Hydrogen reduction of MoO3−Fe mixes studied by stepwise differential isothermal analysis. Journal of Thermal Analysis 40, 313–319 (1993). https://doi.org/10.1007/BF02546581

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