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Vanadium Recovery from Spent SCR Denitration Catalyst by Reductive Acid Leaching and Ammonium Precipitation: Vanadium Recovery from Spent SCR Denitration Catalyst by Reductive Acid Leaching and Ammonium Precipitation: Chang, Li, Wei, Qiao, Yue, Fan, Zhang, and Guo

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Title: Vanadium Recovery from Spent SCR Denitration Catalyst by Reductive Acid Leaching and Ammonium Precipitation: Vanadium Recovery from Spent SCR Denitration Catalyst by Reductive Acid Leaching and Ammonium Precipitation: Chang, Li, Wei, Qiao, Yue, Fan, Zhang, and Guo
Authors: Chang, Jie1,2,3 (AUTHOR), Li, Dong1,2,3 (AUTHOR) dongli@csu.edu.cn, Wei, Yuxuan1,2,3 (AUTHOR), Qiao, Jinxi1,2,3 (AUTHOR), Yue, Xilong1,4 (AUTHOR), Fan, Hongjie4 (AUTHOR), Zhang, Lei1,2,3 (AUTHOR), Guo, Xueyi1,2,3 (AUTHOR)
Source: JOM: The Journal of The Minerals, Metals & Materials Society (TMS). May2025, Vol. 77 Issue 5, p3112-3124. 13p.
Subjects: Nonferrous metals, Diffusion control, Catalytic reduction, Vanadium, Metallurgy
Abstract: The selective catalytic reduction catalyst commonly used in denitration in industry will be transformed into non-renewable spent SCR denitration catalyst (SSDC) after long-term use and deactivation. The SSDC is considered a potential secondary resource for recovering rare metal vanadium. Because trivalent/tetravalent vanadium has a higher solubility than pentavalent vanadium in an acidic solution, reductive acid leaching is more conducive to recovering vanadium from SSDC than direct acid leaching. The study of "reductive acid leaching-circulating leaching and oxidation-ammonium precipitation" was systematically carried out for the efficient recovery of vanadium from SSDC. First, the thermodynamics, leaching behaviors, and kinetics of the vanadium reductive leaching process were studied in the H2SO4-Na2SO3 system. The effects of leaching parameters on the vanadium leaching behaviors were explored. The vanadium leaching efficiency reaches 88.26% under the best experimental conditions. The leaching process of vanadium matches the Johnson-Mehl-Avrami dynamic model, and the Avrami index is 0.133, which indicates this process belongs to internal diffusion control. After circulating leaching and oxidation, vanadium was precipitated by adding (NH4)2SO4, and the vanadium precipitation efficiency reached 84.87% under the optimal conditions. The purity of V2O5 product prepared by high-temperature calcination of ammonium polyvanadate can reach 99.96%. [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.)
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  Data: Vanadium Recovery from Spent SCR Denitration Catalyst by Reductive Acid Leaching and Ammonium Precipitation: Vanadium Recovery from Spent SCR Denitration Catalyst by Reductive Acid Leaching and Ammonium Precipitation: Chang, Li, Wei, Qiao, Yue, Fan, Zhang, and Guo
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  Data: <searchLink fieldCode="DE" term="%22Nonferrous+metals%22">Nonferrous metals</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion+control%22">Diffusion control</searchLink><br /><searchLink fieldCode="DE" term="%22Catalytic+reduction%22">Catalytic reduction</searchLink><br /><searchLink fieldCode="DE" term="%22Vanadium%22">Vanadium</searchLink><br /><searchLink fieldCode="DE" term="%22Metallurgy%22">Metallurgy</searchLink>
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  Data: The selective catalytic reduction catalyst commonly used in denitration in industry will be transformed into non-renewable spent SCR denitration catalyst (SSDC) after long-term use and deactivation. The SSDC is considered a potential secondary resource for recovering rare metal vanadium. Because trivalent/tetravalent vanadium has a higher solubility than pentavalent vanadium in an acidic solution, reductive acid leaching is more conducive to recovering vanadium from SSDC than direct acid leaching. The study of "reductive acid leaching-circulating leaching and oxidation-ammonium precipitation" was systematically carried out for the efficient recovery of vanadium from SSDC. First, the thermodynamics, leaching behaviors, and kinetics of the vanadium reductive leaching process were studied in the H2SO4-Na2SO3 system. The effects of leaching parameters on the vanadium leaching behaviors were explored. The vanadium leaching efficiency reaches 88.26% under the best experimental conditions. The leaching process of vanadium matches the Johnson-Mehl-Avrami dynamic model, and the Avrami index is 0.133, which indicates this process belongs to internal diffusion control. After circulating leaching and oxidation, vanadium was precipitated by adding (NH4)2SO4, and the vanadium precipitation efficiency reached 84.87% under the optimal conditions. The purity of V2O5 product prepared by high-temperature calcination of ammonium polyvanadate can reach 99.96%. [ABSTRACT FROM AUTHOR]
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  Label:
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  Data: <i>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.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11837-024-06957-w
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        Text: English
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        PageCount: 13
        StartPage: 3112
    Subjects:
      – SubjectFull: Nonferrous metals
        Type: general
      – SubjectFull: Diffusion control
        Type: general
      – SubjectFull: Catalytic reduction
        Type: general
      – SubjectFull: Vanadium
        Type: general
      – SubjectFull: Metallurgy
        Type: general
    Titles:
      – TitleFull: Vanadium Recovery from Spent SCR Denitration Catalyst by Reductive Acid Leaching and Ammonium Precipitation: Vanadium Recovery from Spent SCR Denitration Catalyst by Reductive Acid Leaching and Ammonium Precipitation: Chang, Li, Wei, Qiao, Yue, Fan, Zhang, and Guo
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            – D: 01
              M: 05
              Text: May2025
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