Thermodynamic behavior of dissolved oxygen and hydrogen in pure vanadium
The mechanism governing the deoxidation of vanadium metal is regarded as fundamental knowledge; however, it has not been elucidated in existing literature. In this paper, the thermodynamic data of V-H-O systems were summarized, and the Gibbs free energies of the main compounds were calcu...
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University of Belgrade, Technical Faculty, Bor
2021-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100037Z.pdf |
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| author | Zhong D.-P. Pei G.-S. Xiang J.-Y. Pan C. Gu W. Lv X.-W. |
| author_facet | Zhong D.-P. Pei G.-S. Xiang J.-Y. Pan C. Gu W. Lv X.-W. |
| author_sort | Zhong D.-P. |
| collection | DOAJ |
| description | The mechanism governing the deoxidation of vanadium metal is regarded as
fundamental knowledge; however, it has not been elucidated in existing
literature. In this paper, the thermodynamic data of V-H-O systems were
summarized, and the Gibbs free energies of the main compounds were
calculated. Consequently, the deoxidation limits of different reductants in
a V-O system were evaluated, namely: Si, Al, and Mg. It was observed that Si
cannot remove an O content of less than 7.27 wt% from V. However, Al was the
stronger reducing agent; it could remove O contents of up to 0.01 and 0.1
wt% at 800 and 1050 °C, respectively. Nevertheless, Mg exhibited the best
reducing properties as it could remove less than 0.01 wt% of O at 1100 °C.
The addition of H2 renders the V-O solid solution unstable to a certain
extent, thereby indicating that H2 facilitates deoxygenation. Furthermore,
the results obtained by analyzing the equilibrium conditions were in
accordance with the results of the deoxidation limit in the V-O system. In
other words, this study demonstrates that the oxygen in vanadium can be
effectively controlled by changing the reductant dosage and temperature. |
| format | Article |
| id | doaj-art-86791e7ff47843e8b8c1405b56604916 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-86791e7ff47843e8b8c1405b566049162025-02-02T12:29:10ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752021-01-0157341341910.2298/JMMB210108037Z1450-53392100037ZThermodynamic behavior of dissolved oxygen and hydrogen in pure vanadiumZhong D.-P.0Pei G.-S.1Xiang J.-Y.2Pan C.3Gu W.4Lv X.-W.5College of Materials Science and Engineering, Chongqing University, Shapingba District, Chongqing, China + Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, ChinaCollege of Materials Science and Engineering, Chongqing University, Shapingba District, Chongqing, China + Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, ChinaCollege of Materials Science and Engineering, Chongqing University, Shapingba District, Chongqing, China + Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, ChinaPangang Group Research Institute co., Ltd., Panzhihua, ChinaCollege of Chemical Engineering, Sichuan University, Chengdu, ChinaThe State Key Laboratory of Mechanical Transmissions, Chongqing University, Shapingba District, Chongqing, China + College of Materials Science and Engineering, Chongqing University, Shapingba District, Chongqing, China + Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, ChinaThe mechanism governing the deoxidation of vanadium metal is regarded as fundamental knowledge; however, it has not been elucidated in existing literature. In this paper, the thermodynamic data of V-H-O systems were summarized, and the Gibbs free energies of the main compounds were calculated. Consequently, the deoxidation limits of different reductants in a V-O system were evaluated, namely: Si, Al, and Mg. It was observed that Si cannot remove an O content of less than 7.27 wt% from V. However, Al was the stronger reducing agent; it could remove O contents of up to 0.01 and 0.1 wt% at 800 and 1050 °C, respectively. Nevertheless, Mg exhibited the best reducing properties as it could remove less than 0.01 wt% of O at 1100 °C. The addition of H2 renders the V-O solid solution unstable to a certain extent, thereby indicating that H2 facilitates deoxygenation. Furthermore, the results obtained by analyzing the equilibrium conditions were in accordance with the results of the deoxidation limit in the V-O system. In other words, this study demonstrates that the oxygen in vanadium can be effectively controlled by changing the reductant dosage and temperature.http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100037Z.pdfv-h-o solid solutiongenerating gibbs free energyde-oxidation limitequilibrium phase |
| spellingShingle | Zhong D.-P. Pei G.-S. Xiang J.-Y. Pan C. Gu W. Lv X.-W. Thermodynamic behavior of dissolved oxygen and hydrogen in pure vanadium Journal of Mining and Metallurgy. Section B: Metallurgy v-h-o solid solution generating gibbs free energy de-oxidation limit equilibrium phase |
| title | Thermodynamic behavior of dissolved oxygen and hydrogen in pure vanadium |
| title_full | Thermodynamic behavior of dissolved oxygen and hydrogen in pure vanadium |
| title_fullStr | Thermodynamic behavior of dissolved oxygen and hydrogen in pure vanadium |
| title_full_unstemmed | Thermodynamic behavior of dissolved oxygen and hydrogen in pure vanadium |
| title_short | Thermodynamic behavior of dissolved oxygen and hydrogen in pure vanadium |
| title_sort | thermodynamic behavior of dissolved oxygen and hydrogen in pure vanadium |
| topic | v-h-o solid solution generating gibbs free energy de-oxidation limit equilibrium phase |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100037Z.pdf |
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