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Sample‐Controlled analysis under high pressure for accelerated process studies
Author(s) -
Perejón Antonio,
SánchezJiménez Pedro E.,
SoriaHoyo Carlos,
Valverde José Manuel,
Criado José Manuel,
PérezMaqueda Luis A.
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15960
Subject(s) - exothermic reaction , gravimetric analysis , work (physics) , hydrogen , process (computing) , thermal , high pressure , thermodynamics , chemistry , thermogravimetric analysis , computer science , organic chemistry , physics , operating system
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 Fe 2 O 3 under high pressure of hydrogen. Advantages of CRTA for discriminating overlapping processes and appraising kinetic reaction mechanisms are shown.