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Ultrasound–Calcination Synergistic Control of (Ce, La)PO4 Catalyst Structure for Enhanced Low‐Temperature NH3‐SCR Performance.

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Title: Ultrasound–Calcination Synergistic Control of (Ce, La)PO4 Catalyst Structure for Enhanced Low‐Temperature NH3‐SCR Performance.
Authors: Li, Na1 (AUTHOR) nkdlina@126.com, Yan, Kai1 (AUTHOR), Tan, Shuning1 (AUTHOR), Wang, Ruifang1 (AUTHOR), Zhang, Zhiyu1 (AUTHOR)
Source: Asia-Pacific Journal of Chemical Engineering. May2026, Vol. 21 Issue 3, p1-14. 14p.
Subjects: Catalyst structure, Catalytic reduction, Ultrasonic waves, Acid catalysts, Oxidation-reduction reaction, Denitrification, Catalysts
Abstract: In this study, (Ce, La)PO4 catalysts were synthesized via an ultrasound‐assisted method. The effects of ultrasound duration and calcination temperature on the low‐temperature NH3‐SCR performance were systematically investigated. The results indicated that the (Ce, La)PO4 catalyst prepared with an ultrasound treatment time of 20 min and a calcination temperature of 400°C exhibited optimal denitrification efficiency, achieving a NOx conversion rate of 95.4% at 250°C. Characterization results revealed that under appropriate ultrasonic treatment and calcination conditions, the catalyst's pore structure and redox properties were significantly improved: The specific surface area reached 38.1105 m2/g, the total pore volume increased to 0.36616 cm3/g, and the average pore size expanded to 19.2 nm. Moreover, the catalyst surface exposed more Lewis and Brønsted acid sites, which enhanced the adsorption and desorption capacity of NH3. The presence of active intermediates such as –NH2, monodentate nitrite, and bidentate nitrite was identified, contributing to a notable improvement in the low‐temperature redox performance of the catalyst. [ABSTRACT FROM AUTHOR]
Copyright of Asia-Pacific Journal of Chemical Engineering 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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DbLabel: Engineering Source
An: 194403128
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PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Ultrasound–Calcination Synergistic Control of (Ce, La)PO<subscript>4</subscript> Catalyst Structure for Enhanced Low‐Temperature NH<subscript>3</subscript>‐SCR Performance.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Na%22">Li, Na</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nkdlina@126.com</i><br /><searchLink fieldCode="AR" term="%22Yan%2C+Kai%22">Yan, Kai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tan%2C+Shuning%22">Tan, Shuning</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Ruifang%22">Wang, Ruifang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Zhiyu%22">Zhang, Zhiyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Asia-Pacific+Journal+of+Chemical+Engineering%22">Asia-Pacific Journal of Chemical Engineering</searchLink>. May2026, Vol. 21 Issue 3, p1-14. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Catalyst+structure%22">Catalyst structure</searchLink><br /><searchLink fieldCode="DE" term="%22Catalytic+reduction%22">Catalytic reduction</searchLink><br /><searchLink fieldCode="DE" term="%22Ultrasonic+waves%22">Ultrasonic waves</searchLink><br /><searchLink fieldCode="DE" term="%22Acid+catalysts%22">Acid catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation-reduction+reaction%22">Oxidation-reduction reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Denitrification%22">Denitrification</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this study, (Ce, La)PO4 catalysts were synthesized via an ultrasound‐assisted method. The effects of ultrasound duration and calcination temperature on the low‐temperature NH3‐SCR performance were systematically investigated. The results indicated that the (Ce, La)PO4 catalyst prepared with an ultrasound treatment time of 20 min and a calcination temperature of 400°C exhibited optimal denitrification efficiency, achieving a NOx conversion rate of 95.4% at 250°C. Characterization results revealed that under appropriate ultrasonic treatment and calcination conditions, the catalyst's pore structure and redox properties were significantly improved: The specific surface area reached 38.1105 m2/g, the total pore volume increased to 0.36616 cm3/g, and the average pore size expanded to 19.2 nm. Moreover, the catalyst surface exposed more Lewis and Brønsted acid sites, which enhanced the adsorption and desorption capacity of NH3. The presence of active intermediates such as –NH2, monodentate nitrite, and bidentate nitrite was identified, contributing to a notable improvement in the low‐temperature redox performance of the catalyst. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Asia-Pacific Journal of Chemical Engineering 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:
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        Value: 10.1002/apj.70220
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      – Code: eng
        Text: English
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        PageCount: 14
        StartPage: 1
    Subjects:
      – SubjectFull: Catalyst structure
        Type: general
      – SubjectFull: Catalytic reduction
        Type: general
      – SubjectFull: Ultrasonic waves
        Type: general
      – SubjectFull: Acid catalysts
        Type: general
      – SubjectFull: Oxidation-reduction reaction
        Type: general
      – SubjectFull: Denitrification
        Type: general
      – SubjectFull: Catalysts
        Type: general
    Titles:
      – TitleFull: Ultrasound–Calcination Synergistic Control of (Ce, La)PO4 Catalyst Structure for Enhanced Low‐Temperature NH3‐SCR Performance.
        Type: main
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            NameFull: Li, Na
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            NameFull: Yan, Kai
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            NameFull: Tan, Shuning
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            NameFull: Wang, Ruifang
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            NameFull: Zhang, Zhiyu
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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            – TitleFull: Asia-Pacific Journal of Chemical Engineering
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