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Impact of Lewis Acid Sites on the Catalyst Lifetime for Methanol‐to‐Hydrocarbons Over Mg‐Dealuminated BEA Zeolite.

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Title: Impact of Lewis Acid Sites on the Catalyst Lifetime for Methanol‐to‐Hydrocarbons Over Mg‐Dealuminated BEA Zeolite.
Authors: Navarro de Miguel, Juan Carlos1 (AUTHOR), Li, Teng1 (AUTHOR), Almeida, José Nuno1 (AUTHOR), Ruiz‐Martínez, Javier2 (AUTHOR) javier.ruizmartinez@kaust.edu.sa
Source: ChemCatChem. 7/8/2025, Vol. 17 Issue 13, p1-8. 8p.
Subjects: Lewis acidity, Magnesium, Catalysts, Catalyst poisoning, Hydrocarbons, Methanol production, Zeolite catalysts
Abstract: In the present work, we show the effect of magnesium incorporation during the methanol‐to‐hydrocarbon (MTH) reaction on partial dealuminated beta zeolite. Based on our findings, we observed an increase in the catalyst lifetime with the increase in Mg concentration as a consequence of the rise in the Lewis acid site population. However, Mg concentrations higher than 1.5 wt% provokes the formation of MgO aggregates, promoting a faster catalyst deactivation. The formation of Lewis acid sites by Mg incorporation limits hydrogen transfer reaction, resulting in a lower selectivity of paraffin and aromatics. Operando UV–vis results show that the hydrocarbon species present a similar nature independent of the Brønsted acid site number, while the concentration differs. Depth analysis of the operando spectroscopy data shows a decrease in the formation rate of polyaromatic species with the Mg incorporation, which correlates with lifetime extension. [ABSTRACT FROM AUTHOR]
Copyright of ChemCatChem is the property of Wiley-Blackwell 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: Impact of Lewis Acid Sites on the Catalyst Lifetime for Methanol‐to‐Hydrocarbons Over Mg‐Dealuminated BEA Zeolite.
– Name: Author
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  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Navarro+de+Miguel%2C+Juan+Carlos%22">Navarro de Miguel, Juan Carlos</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Teng%22">Li, Teng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Almeida%2C+José+Nuno%22">Almeida, José Nuno</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ruiz‐Martínez%2C+Javier%22">Ruiz‐Martínez, Javier</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> javier.ruizmartinez@kaust.edu.sa</i>
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  Data: <searchLink fieldCode="JN" term="%22ChemCatChem%22">ChemCatChem</searchLink>. 7/8/2025, Vol. 17 Issue 13, p1-8. 8p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Lewis+acidity%22">Lewis acidity</searchLink><br /><searchLink fieldCode="DE" term="%22Magnesium%22">Magnesium</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Catalyst+poisoning%22">Catalyst poisoning</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrocarbons%22">Hydrocarbons</searchLink><br /><searchLink fieldCode="DE" term="%22Methanol+production%22">Methanol production</searchLink><br /><searchLink fieldCode="DE" term="%22Zeolite+catalysts%22">Zeolite catalysts</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In the present work, we show the effect of magnesium incorporation during the methanol‐to‐hydrocarbon (MTH) reaction on partial dealuminated beta zeolite. Based on our findings, we observed an increase in the catalyst lifetime with the increase in Mg concentration as a consequence of the rise in the Lewis acid site population. However, Mg concentrations higher than 1.5 wt% provokes the formation of MgO aggregates, promoting a faster catalyst deactivation. The formation of Lewis acid sites by Mg incorporation limits hydrogen transfer reaction, resulting in a lower selectivity of paraffin and aromatics. Operando UV–vis results show that the hydrocarbon species present a similar nature independent of the Brønsted acid site number, while the concentration differs. Depth analysis of the operando spectroscopy data shows a decrease in the formation rate of polyaromatic species with the Mg incorporation, which correlates with lifetime extension. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of ChemCatChem is the property of Wiley-Blackwell 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: 10.1002/cctc.202500151
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 1
    Subjects:
      – SubjectFull: Lewis acidity
        Type: general
      – SubjectFull: Magnesium
        Type: general
      – SubjectFull: Catalysts
        Type: general
      – SubjectFull: Catalyst poisoning
        Type: general
      – SubjectFull: Hydrocarbons
        Type: general
      – SubjectFull: Methanol production
        Type: general
      – SubjectFull: Zeolite catalysts
        Type: general
    Titles:
      – TitleFull: Impact of Lewis Acid Sites on the Catalyst Lifetime for Methanol‐to‐Hydrocarbons Over Mg‐Dealuminated BEA Zeolite.
        Type: main
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          Name:
            NameFull: Navarro de Miguel, Juan Carlos
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            NameFull: Li, Teng
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            NameFull: Almeida, José Nuno
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            NameFull: Ruiz‐Martínez, Javier
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            – D: 08
              M: 07
              Text: 7/8/2025
              Type: published
              Y: 2025
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              Value: 17
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