Investigation of Graphite Oxidation Based on Four-step Reaction Model

Shen Teng; Wang Chengyu; Guo Shaoqiang; He Kai

doi:10.13832/j.jnpe.2025.01.0169

Volume 46 Issue 1

Feb. 2025

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Shen Teng, Wang Chengyu, Guo Shaoqiang, He Kai. Investigation of Graphite Oxidation Based on Four-step Reaction Model[J]. Nuclear Power Engineering, 2025, 46(1): 169-174. doi: 10.13832/j.jnpe.2025.01.0169

Citation:

Shen Teng, Wang Chengyu, Guo Shaoqiang, He Kai. Investigation of Graphite Oxidation Based on Four-step Reaction Model[J]. Nuclear Power Engineering, 2025, 46(1): 169-174. doi: 10.13832/j.jnpe.2025.01.0169

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Investigation of Graphite Oxidation Based on Four-step Reaction Model

doi: 10.13832/j.jnpe.2025.01.0169

Shen Teng^1
,,
Wang Chengyu^{2, 3},
Guo Shaoqiang^{2
,
,},
He Kai¹

1.
China Nuclear Power Engineering Co., Ltd., Beijing, 100084, China
2.
School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an, 710049, China
3.
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

Received Date: 2024-05-09
Rev Recd Date: 2024-07-04
Publish Date: 2025-02-15

Abstract

Abstract

In order to establish the analysis method of corrosion reaction between graphite and oxygen in the core of Micro Gas-Cooled Reactor, a four-step reaction model of graphite oxidation corrosion is established based on Arrhenius equation. The four-step reaction of the model represents four possible chemical reactions between graphite and oxygen, and the reactive area is increased to simulate the influence of weight loss rate on corrosion rate. Through the experiment of graphite oxidation corrosion based on gas concentration method, the oxidation corrosion rates of graphite with different gas flow rates and oxygen concentrations at 500-1100°C were obtained, and the experimental data were used for corrosion parameter fitting and model verification respectively. The results of modeling and verification analysis show that the fitted four-step reaction model can be applied to the calculation and analysis of the oxidation corrosion rate of graphite and can distinguish the reaction products, and the increase of the reactive area of the model is more conducive to accurately predicting the oxidation corrosion rate under high weight loss.
- Graphite,
- Oxidation,
- Activation energy,
- Experiment,
- Reaction model

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References(11)

References

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