Kinetic and Mechanism Study of the Reduction of WO2 to W by CO or CO-CO2 Mixed Gas.
Saved in:
| Title: | Kinetic and Mechanism Study of the Reduction of WO |
|---|---|
| Authors: | Li, Meng-Chao1,2 (AUTHOR), Wang, Lu2 (AUTHOR) wanglu@wust.edu.cn, Xue, Zheng-Liang1 (AUTHOR) |
| Source: | JOM: The Journal of The Minerals, Metals & Materials Society (TMS). Sep2023, Vol. 75 Issue 9, p3951-3961. 11p. |
| Subjects: | Phase transitions, Interfacial reactions, Chemical reactions, Activation (Chemistry), X-ray diffraction |
| 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. [ABSTRACT FROM AUTHOR] |
| Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| 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. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 10474838 |
| DOI: | 10.1007/s11837-023-06008-w |
