Sample‐Controlled analysis under high pressure for accelerated process studies

The potential of controlled rate thermal analysis (CRTA) for studying high‐pressure gas‐solid processes has been evaluated. CRTA is a type of smart temperature program based on a feedback system that uses any experimental signal related to the process evolution for commanding the temperature evoluti...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2019-03, Vol.102 (3), p.1338-1346
Main Authors: Perejón, Antonio, Sánchez‐Jiménez, Pedro E., Soria‐Hoyo, Carlos, Valverde, José Manuel, Criado, José Manuel, Pérez‐Maqueda, Luis A.
Format: Article
Language:English
Subjects:
constant rate thermal analysis
Control equipment
Evolution
Exothermic reactions
Gas-solid reactions
Gravimetry
Oxidation
Reaction mechanisms
Signal processing
Thermal analysis
thermal decomposition
thermogravimetry
titanium carbide
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Summary:The potential of controlled rate thermal analysis (CRTA) for studying high‐pressure gas‐solid processes has been evaluated. CRTA is a type of smart temperature program based on a feedback system that uses any experimental signal related to the process evolution for commanding the temperature evolution. In this work, an instrument that uses the gravimetric signal for CRTA control has been designed and used for the study of two high‐pressure gas‐solid reactions: the highly exothermic thermal oxidation of TiC under high pressure of oxygen and the reduction in Fe2O3 under high pressure of hydrogen. Advantages of CRTA for discriminating overlapping processes and appraising kinetic reaction mechanisms are shown. An instrument that uses the gravimetric signal for performing Controlled Rate Thermal Analysis (CRTA) has been designed and used for the study of two high pressure reactions: the thermal oxidation of TiC under high pressure of oxygen and the reduction of Fe2O3 under high pressure of hydrogen.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.15960