SO2-resistant NOx reduction over Cu-SAPO-34 catalysts via creating sulfur-phobic Cu sites

He, Jiebing; Deng, Jiang; Zhang, Jin; Han, Lupeng; Shen, Yongjie; Chen, Xin; Hu, Xiaonan; Jun-an, Wang; Zhang, Dengsong

doi:10.1039/d2cy02151j

Cited by 9 publications

(2 citation statements)

References 56 publications

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“…Inevitably, even low levels of SO 2 from ultra-low sulfur fuel could deactivate catalysts under practical conditions, posing limitations on the development of Cu-based catalysts. [129][130][131][132] SO 2 molecules reacted with NH 3 and H 2 O at appropriate temperatures to form ammonium bisulfate, which further reacted with catalyst components to generate metal sulfates. Generally, low temperature and high concentrations of SO 2 would accelerate the deposition of ammonium sulfate on the surface of catalysts, thus reducing the denitrification efficiency.…”

Section: So 2 Poisoning-resistancementioning

confidence: 99%

Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

Liu,

Zhang,

et al. 2024

EES. Catal.

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Section: So 2 Poisoning-resistancementioning

confidence: 99%

Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

Liu,

Zhang,

et al. 2024

EES. Catal.

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“…1 Among many NO x elimination (de-NO x ) catalysts, such as one or more combinations of metal oxide catalysts (V, 2 Mn, 3 Mo, 4 W, 5 Ce, 6 and Fe (ref. 7)) and ion-exchanged molecular sieves (Cu-SSZ-13, 8 Cu-SAPO-34, 9 and Cu-SSZ-39 (ref. 10)), vanadium-based catalysts for the selective catalytic reduction (SCR) of NO x by NH 3 (NH 3 -SCR) is the most widely used NO x elimination technology.…”

Section: Introductionmentioning

confidence: 99%

Active vanadium(iv) species synthesized at low-temperature facilitate excellent performance in low-temperature NO_x-catalytic removal

Sun

Liu

et al. 2023

Catal. Sci. Technol.

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Regulation of Coordination Environment Over Cu Sites: Triggering the Efficient Selective Catalytic Reduction of NO_x Using NH₃ as Reductant

Zhao,

Li,

Yang

et al. 2024

Applied Organom Chemis

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The design of the controlled coordination environment over Cu sites for selective catalytic reduction of NOx using NH3 as reductant (NH3‐SCR) is still challenging. A series of dispersed Cu catalysts with different coordination environments were prepared by metal‐template/metal‐ion exchanged method and random grafting method. Meanwhile, their NH3‐SCR catalytic performance was explored. The catalyst C/T9‐M, prepared through metal‐template/metal‐ion exchanged method, achieved relatively good activity with the NOx conversion of ~100% in the temperature region of 250°C°C–400°C. It was ascribed to C/T9‐M containing a higher amount of the isolated Cu2+ and without occurring the direct oxidation of NH3 to NO at high temperature. On the contrary, C/T9‐R synthesized using random grafting method demonstrated more outstanding NH3‐SCR performance with the NOx conversion of ~100% in the temperature region of 200°C°C–350°C due to more [Cu(OH)]+. Our experimental results confirmed that the active [Cu(OH)]+ was capable of facilitating the low‐temperature activity for NH3‐SCR and the isolated Cu2+ facilitates NOx conversion under high temperature. In addition, compared with the C/T9‐R catalyst, the C/T9‐M catalyst had less Cu loading, which laterally proved that controlling the coordination environment of Cu sites could effectively improve the NH3‐SCR performance under high temperature. What's more, C/T9‐M had more glorious the resistance of H2O and SO2 than C/T9‐R. This work furnishes reformatory pathway for the invention of noticeable NH3‐SCR catalysts. It is expedient for academic and practical applications in the future.

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SO₂-resistant NO_x reduction over Cu-SAPO-34 catalysts via creating sulfur-phobic Cu sites

Abstract: Commercial Cu-SAPO-34 suffer from poisoning of SO2 in the selective catalytic reduction of NOx with NH3 (NH3-SCR). It is challenging to inhibit the deposition of ammonium hydrogen sulfate (ABS) and...

Cited by 9 publications

References 56 publications

Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

Active vanadium(iv) species synthesized at low-temperature facilitate excellent performance in low-temperature NO_x-catalytic removal

Regulation of Coordination Environment Over Cu Sites: Triggering the Efficient Selective Catalytic Reduction of NO_x Using NH₃ as Reductant

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SO2-resistant NOx reduction over Cu-SAPO-34 catalysts via creating sulfur-phobic Cu sites

Abstract: Commercial Cu-SAPO-34 suffer from poisoning of SO2 in the selective catalytic reduction of NOx with NH3 (NH3-SCR). It is challenging to inhibit the deposition of ammonium hydrogen sulfate (ABS) and...

Cited by 9 publications

References 56 publications

Selective catalytic reduction of NOx with NH3 over copper-based catalysts: recent advances and future prospects

Selective catalytic reduction of NOx with NH3 over copper-based catalysts: recent advances and future prospects

Active vanadium(iv) species synthesized at low-temperature facilitate excellent performance in low-temperature NOx-catalytic removal

Regulation of Coordination Environment Over Cu Sites: Triggering the Efficient Selective Catalytic Reduction of NOx Using NH3 as Reductant

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Resources

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SO₂-resistant NO_x reduction over Cu-SAPO-34 catalysts via creating sulfur-phobic Cu sites

Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

Active vanadium(iv) species synthesized at low-temperature facilitate excellent performance in low-temperature NO_x-catalytic removal

Regulation of Coordination Environment Over Cu Sites: Triggering the Efficient Selective Catalytic Reduction of NO_x Using NH₃ as Reductant