Study on preparation of vanadium trioxide by hydrogen reduction

Shi Qihua; Yin Danfeng; Wang Ning; Chen Haijun; Jing Han

doi:10.7513/j.issn.1004-7638.2021.02.005

Volume 42 Issue 2

Apr. 2021

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Shi Qihua, Yin Danfeng, Wang Ning, Chen Haijun, Jing Han. Study on preparation of vanadium trioxide by hydrogen reduction[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 23-27. doi: 10.7513/j.issn.1004-7638.2021.02.005

Citation:

Shi Qihua, Yin Danfeng, Wang Ning, Chen Haijun, Jing Han. Study on preparation of vanadium trioxide by hydrogen reduction[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 23-27. doi: 10.7513/j.issn.1004-7638.2021.02.005

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Study on preparation of vanadium trioxide by hydrogen reduction

doi: 10.7513/j.issn.1004-7638.2021.02.005

Pangang Group Research Institute Co., Ltd., State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China

Received Date: 2020-12-22
Publish Date: 2021-04-10

Abstract

Abstract

In this paper, the preparation of V₂O₃ by hydrogen reduction was systematically studied. The stable state of vanadium under different conditions was determined by thermodynamic analysis of vanadium redox reactions in V-H-O system. The influence of reaction temperature and time on deoxidation was analyzed, and the optimum reduction conditions were obtained. Under the optimum conditions, the V₂O₃ product with a vanadium content of 67.81% can be obtained. At the same time, the phase changes of V₂O₅ during the reduction process were revealed via X-ray diffraction. It shows a stepwise reduction process of V₂O₅, with the intermediate products of V₃O₁₆ and V₃O₇ formed during the reduction. As the reduction proceeds, the intermediates can be gradually decomposed into V₂O₃ and VO₂. Finally, VO₂ is completely reduced into V₂O₃.
- vanadium trioxide,
- vanadium pentoxide,
- hydrogen,
- reduction,
- ammonium ferrous sulfate titration mothod,
- X-ray diffractometer

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References(9)

References

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