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Efficient removal of carbon monoxide from low-temperature sintering flue gas by non-thermal plasma catalytic coupling system.

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Title: Efficient removal of carbon monoxide from low-temperature sintering flue gas by non-thermal plasma catalytic coupling system.
Authors: Ma, Shihui1 (AUTHOR), Gan, Min1 (AUTHOR) csumashihui@163.com, Fan, Xiaohui1 (AUTHOR), Ji, Zhiyun1 (AUTHOR), Sun, Zengqing1 (AUTHOR), Liu, Lincheng1 (AUTHOR)
Source: Separation & Purification Technology. Aug2025:Part 1, Vol. 363, pN.PAG-N.PAG. 1p.
Subjects: Electron cloud effect, Flue gases, Non-thermal plasmas, Technological innovations, Electron density, Phase separation
Abstract: Synopsis: The innovative technology promote the low energy consumption and efficient treatment of CO in steel industry flue gas, and informs the air environmental system. [Display omitted] • Discharge synergetic catalyst promote CO oxidation in low temperature flue gas. • Plasma affects CuMnO x lattice structure reducing the reaction activation energy. • Improving activity needs to balance adsorption stability and surface mobility. • Breaking previous studies limitations, exploring plasma from new perspective. • Proposing that L-H and M−v−K mechanisms jointly completing CO oxidation. Plasma coupled CuMnO x enhances catalytic activity of CO in low-temperature flue gas. Without plasma, the CO conversion rate is 4 % at room temperature, which exceeds 50 % under the optimal discharge condition of 350 J/L, increasing 12 times. Additional, the conversion rate is close to 100 % at a sintering flue gas temperature of 110℃. The turnover frequency of Mn sites increased from 0.0193 h−1 to 0.0233 h−1, and CO reaction rate increased from 0.20 to 1.31 μmol/(g*s), increasing 7.5 times. Dynamics studies shown that NTP coupling reduces the Ea of CO oxidation reaction from 40.8 kJ/mol to 17.4 kJ/mol, improving the low-temperature reaction activity. Research found that the enhanced effect of electron cloud overlap causes Coulomb repulsion, leading to lattice rupture after non-thermal plasma treatment. The high-energy particles by ionization undergo ionization and recombination of transition metal atoms through continuous bombardment, eliminating phase separation phenomena and forming more active Cu–O-Mn phase structures, efficiently reactivating inert lattice oxygen, thereby overcoming the limitations associated with thermal deactivation. Meanwhile, plasma induced electron injection, increasing the electron density of transition metal d-orbitals, causing the center of the d-band to shift upwards, leading to the transfer of electron clouds to antibonding orbitals and triggering the electron scissor effect, thereby reducing the stability of CO adsorption. It results in the release of Cu+ sites on the surface, which act as Lewis acid sites and participate in the adsorption and decomposition of O 3 and other oxidation discharge products. The above effects collectively transform CO oxidation from a single mechanism to a synergistic effect of multiple mechanisms. This also provides new ideas for the design of subsequent flue gas treatment processes. [ABSTRACT FROM AUTHOR]
Copyright of Separation & Purification Technology is the property of Elsevier B.V. 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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DbLabel: Engineering Source
An: 183573042
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  Data: Efficient removal of carbon monoxide from low-temperature sintering flue gas by non-thermal plasma catalytic coupling system.
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  Data: <searchLink fieldCode="AR" term="%22Ma%2C+Shihui%22">Ma, Shihui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gan%2C+Min%22">Gan, Min</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> csumashihui@163.com</i><br /><searchLink fieldCode="AR" term="%22Fan%2C+Xiaohui%22">Fan, Xiaohui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ji%2C+Zhiyun%22">Ji, Zhiyun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Zengqing%22">Sun, Zengqing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Lincheng%22">Liu, Lincheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Separation+%26+Purification+Technology%22">Separation & Purification Technology</searchLink>. Aug2025:Part 1, Vol. 363, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Electron+cloud+effect%22">Electron cloud effect</searchLink><br /><searchLink fieldCode="DE" term="%22Flue+gases%22">Flue gases</searchLink><br /><searchLink fieldCode="DE" term="%22Non-thermal+plasmas%22">Non-thermal plasmas</searchLink><br /><searchLink fieldCode="DE" term="%22Technological+innovations%22">Technological innovations</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+density%22">Electron density</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+separation%22">Phase separation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Synopsis: The innovative technology promote the low energy consumption and efficient treatment of CO in steel industry flue gas, and informs the air environmental system. [Display omitted] • Discharge synergetic catalyst promote CO oxidation in low temperature flue gas. • Plasma affects CuMnO x lattice structure reducing the reaction activation energy. • Improving activity needs to balance adsorption stability and surface mobility. • Breaking previous studies limitations, exploring plasma from new perspective. • Proposing that L-H and M−v−K mechanisms jointly completing CO oxidation. Plasma coupled CuMnO x enhances catalytic activity of CO in low-temperature flue gas. Without plasma, the CO conversion rate is 4 % at room temperature, which exceeds 50 % under the optimal discharge condition of 350 J/L, increasing 12 times. Additional, the conversion rate is close to 100 % at a sintering flue gas temperature of 110℃. The turnover frequency of Mn sites increased from 0.0193 h−1 to 0.0233 h−1, and CO reaction rate increased from 0.20 to 1.31 μmol/(g*s), increasing 7.5 times. Dynamics studies shown that NTP coupling reduces the Ea of CO oxidation reaction from 40.8 kJ/mol to 17.4 kJ/mol, improving the low-temperature reaction activity. Research found that the enhanced effect of electron cloud overlap causes Coulomb repulsion, leading to lattice rupture after non-thermal plasma treatment. The high-energy particles by ionization undergo ionization and recombination of transition metal atoms through continuous bombardment, eliminating phase separation phenomena and forming more active Cu–O-Mn phase structures, efficiently reactivating inert lattice oxygen, thereby overcoming the limitations associated with thermal deactivation. Meanwhile, plasma induced electron injection, increasing the electron density of transition metal d-orbitals, causing the center of the d-band to shift upwards, leading to the transfer of electron clouds to antibonding orbitals and triggering the electron scissor effect, thereby reducing the stability of CO adsorption. It results in the release of Cu+ sites on the surface, which act as Lewis acid sites and participate in the adsorption and decomposition of O 3 and other oxidation discharge products. The above effects collectively transform CO oxidation from a single mechanism to a synergistic effect of multiple mechanisms. This also provides new ideas for the design of subsequent flue gas treatment processes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Separation & Purification Technology is the property of Elsevier B.V. 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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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.seppur.2025.132063
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Electron cloud effect
        Type: general
      – SubjectFull: Flue gases
        Type: general
      – SubjectFull: Non-thermal plasmas
        Type: general
      – SubjectFull: Technological innovations
        Type: general
      – SubjectFull: Electron density
        Type: general
      – SubjectFull: Phase separation
        Type: general
    Titles:
      – TitleFull: Efficient removal of carbon monoxide from low-temperature sintering flue gas by non-thermal plasma catalytic coupling system.
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            NameFull: Ma, Shihui
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            NameFull: Gan, Min
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            NameFull: Sun, Zengqing
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              M: 08
              Text: Aug2025:Part 1
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              Y: 2025
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