Calcite: Kinetics of Two-step Thermal Decomposition

DOI

10.2991/ame-16.2016.148How to use a DOI?

Keywords

Calcite, Thermal decomposition, Kinetics, Reaction mechanism, Activation energy.

Abstract

Thermal decomposition of calcium carbonate has been studied by thermogravimetric analysis (TGA). The complementary application of the isoconversional method and model-fitting method has been used for deriving the kinetic triplet (activation energy [E], frequency factor [A], and model) from the TGA experiment. The conversion dependence of activation energy obtained from the isoconversional method suggested that the decomposition process was divided into two steps. For each step, it was based on using the isoconversional method to select the reaction model, and then with using the model-fitting method the frequency factor can be obtained. By determining two sets of the kinetic triplets, it can be derived that the steps of CaCO3 decomposition change from nuclei growth to phase boundary reaction.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Di Wang
AU  - Guang-Lei Tan
AU  - Zhen Zhao
AU  - Qi Wang
PY  - 2016/06
DA  - 2016/06
TI  - Calcite: Kinetics of Two-step Thermal Decomposition
BT  - Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)
PB  - Atlantis Press
SP  - 907
EP  - 915
SN  - 2352-5401
UR  - https://doi.org/10.2991/ame-16.2016.148
DO  - 10.2991/ame-16.2016.148
ID  - Wang2016/06
ER  -