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- Title
Kinetic and Mechanism Study of the Reduction of WO<sub>2</sub> to W by CO or CO-CO<sub>2</sub> Mixed Gas.
- Authors
Li, Meng-Chao; Wang, Lu; Xue, Zheng-Liang
- Abstract
In the work, the reaction kinetic and mechanism of the reduction of WO2 to W by CO or CO-CO2 mixed gas were investigated in the range of 1351–1430 K. Various technologies such as XRD, FE-SEM, TG, thermodynamic calculation, and model fitting methods were adopted to analyze the experimental data. The results showed that the reduction of WO2 to W was a one-step reaction process without any intermediate products generated. The higher the temperature was, the faster the reduction rate. The reduction processes of WO2 to W by CO or CO-CO2 mixed gas was controlled by the interfacial chemical reactions with the activation energies extracted being 113 kJ/mol and 90 kJ/mol, respectively. Combining the phase transition and morphology evolution characterizations, a possible reaction mechanism for the reduction of WO2 to W was proposed.
- Subjects
PHASE transitions; INTERFACIAL reactions; CHEMICAL reactions; ACTIVATION (Chemistry); X-ray diffraction
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2023, Vol 75, Issue 9, p3951
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-023-06008-w