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Thermal Oxidation of Carbonaceous Nanomaterials Revisited: Evidence of Mechanism Changes

Picheau, Emmanuel and Hof, Ferdinand and Derré, Alain and Daffos, Barbara and Pénicaud, Alain Thermal Oxidation of Carbonaceous Nanomaterials Revisited: Evidence of Mechanism Changes. (2019) Angewandte Chemie International Edition, 131 (42). 1-6. ISSN 1433-7851

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Official URL: https://doi.org/10.1002/anie.201906026

Abstract

Kinetic data, for example, activation energy and reaction order, are crucial for the understanding of chemical reactions and processes. Here, we describe a novel method for obtaining kinetic data based on thermogravimetric measurements (TGA) that exploits in each measurement multiple successive isothermal steps (SIS). We applied this method to the notoriously challenging carbon combustion process for vastly different carbons for oxygen molar fractions between 1.4 % and 90 %. Our obtained apparent EA values are within the wide range of results in the literature and vary in a systematic way with the oxygen partial pressure. The improved accuracy and large amount of obtainable data allowed us to show that the majority of experimentally obtained apparent data for apparent EA are neither in a kinetic regime nor in a diffusion‐controlled one but rather in a transition regime.

Item Type:Article
HAL Id:hal-02309164
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Collège de France (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > Sorbonne Université (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Nantes (FRANCE)
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
Other partners > Université de Bordeaux (FRANCE)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Other partners > Université de Montpellier (FRANCE)
Laboratory name:
Funders:
Agence Nationale de la Recherche - ANR - eutsche Forschungsgemeinschaft (DFG) - Centre national de la recherche scientifique - CNRS
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Deposited By: cirimat webmestre
Deposited On:09 Oct 2019 07:11

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