SO3 2−/SO4 2− functionalization-tailorable catalytic surface features of Sb-promoted Cu3V2O8 on TiO2 for selective catalytic reduction of NOX with NH3

Jongsik Kim, Somin Lee, Dong Wook Kwon, Kwan Young Lee, Heon Phil Ha

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

SO2 is notorious to poison the catalytic surface during the selective catalytic reduction of NOX with NH3 (NH3-SCR). Nonetheless, the use of poisonous SO2 and O2 as surface modifiers to generate the surface metal-SOY 2− species (Y = 3 or 4) can be one of the viable ways for promoting catalytic NH3-SCR consequence. To develop a novel catalyst that is highly active in and selective to NH3-SCR, we previously explored four catalytic copper vanadates and determined the optimum active phase (i.e., Cu3V2O8, denoted as Cu3) that revealed the greatest NH3-SCR performance, when combining with a proper Sb quantity of 1.4 wt. %. While using anatase (TiO2) as a support, this study investigated the effect of SOY 2− functionalization temperature on the surface property of the optimum catalyst, Sb-promoted Cu3V2O8 on TiO2 (Cu3-Sb1.4/TiO2). Cu3-Sb1.4/TiO2 was subjected to SOY 2− functionalization at 300, 400, and 500 °C, leading to the formation of S300, S400, and S500. Although the catalyst surface was not fully functionalized with the SOY 2− species in S300-S500, various metal sulfate or sulfite species appeared on the surfaces and showed distinct surface features. The SOY 2− functionalization of Cu3-Sb1.4/TiO2 could not increase the quantity of Lewis acid sites. However, 400 °C was deemed as an adequate SOY 2− functionalization temperature for increasing the quantity of Brӧnsted acid sites and the redox behavior of the intact Cu3-Sb1.4/TiO2. This could result from the increase in the surface abundance of Cu(SO4) or from a proper combination of the metal-bound SOY 2− species with mono-dentate and bi-dentate binding configurations. Apart from exhibiting moderate tolerance to hydrothermal aging, S400 was also validated to improve its resistance to alkali-metal, H2O, SO2, (NH4)2SO4, or (NH4)HSO4 in comparison to its SOY 2−-unfunctionalized counterpart, S300, and S500.

Original languageEnglish
Pages (from-to)355-366
Number of pages12
JournalApplied Catalysis A: General
Volume570
DOIs
Publication statusPublished - 2019 Jan 25

Fingerprint

Selective catalytic reduction
Thyristors
Metals
Catalysts
Alkali Metals
Lewis Acids
Sulfites
Vanadates
Acids
Poisons
Alkali metals
Titanium dioxide
Sulfates
Surface properties
Copper
Aging of materials
Temperature

Keywords

  • Antimony
  • Copper vanadate
  • CuVO
  • Selective catalytic reduction of NO
  • SO /SO functionalization

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

SO3 2−/SO4 2− functionalization-tailorable catalytic surface features of Sb-promoted Cu3V2O8 on TiO2 for selective catalytic reduction of NOX with NH3 . / Kim, Jongsik; Lee, Somin; Kwon, Dong Wook; Lee, Kwan Young; Ha, Heon Phil.

In: Applied Catalysis A: General, Vol. 570, 25.01.2019, p. 355-366.

Research output: Contribution to journalArticle

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abstract = "SO2 is notorious to poison the catalytic surface during the selective catalytic reduction of NOX with NH3 (NH3-SCR). Nonetheless, the use of poisonous SO2 and O2 as surface modifiers to generate the surface metal-SOY 2− species (Y = 3 or 4) can be one of the viable ways for promoting catalytic NH3-SCR consequence. To develop a novel catalyst that is highly active in and selective to NH3-SCR, we previously explored four catalytic copper vanadates and determined the optimum active phase (i.e., Cu3V2O8, denoted as Cu3) that revealed the greatest NH3-SCR performance, when combining with a proper Sb quantity of 1.4 wt. {\%}. While using anatase (TiO2) as a support, this study investigated the effect of SOY 2− functionalization temperature on the surface property of the optimum catalyst, Sb-promoted Cu3V2O8 on TiO2 (Cu3-Sb1.4/TiO2). Cu3-Sb1.4/TiO2 was subjected to SOY 2− functionalization at 300, 400, and 500 °C, leading to the formation of S300, S400, and S500. Although the catalyst surface was not fully functionalized with the SOY 2− species in S300-S500, various metal sulfate or sulfite species appeared on the surfaces and showed distinct surface features. The SOY 2− functionalization of Cu3-Sb1.4/TiO2 could not increase the quantity of Lewis acid sites. However, 400 °C was deemed as an adequate SOY 2− functionalization temperature for increasing the quantity of Brӧnsted acid sites and the redox behavior of the intact Cu3-Sb1.4/TiO2. This could result from the increase in the surface abundance of Cu(SO4) or from a proper combination of the metal-bound SOY 2− species with mono-dentate and bi-dentate binding configurations. Apart from exhibiting moderate tolerance to hydrothermal aging, S400 was also validated to improve its resistance to alkali-metal, H2O, SO2, (NH4)2SO4, or (NH4)HSO4 in comparison to its SOY 2−-unfunctionalized counterpart, S300, and S500.",
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AU - Kwon, Dong Wook

AU - Lee, Kwan Young

AU - Ha, Heon Phil

PY - 2019/1/25

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N2 - SO2 is notorious to poison the catalytic surface during the selective catalytic reduction of NOX with NH3 (NH3-SCR). Nonetheless, the use of poisonous SO2 and O2 as surface modifiers to generate the surface metal-SOY 2− species (Y = 3 or 4) can be one of the viable ways for promoting catalytic NH3-SCR consequence. To develop a novel catalyst that is highly active in and selective to NH3-SCR, we previously explored four catalytic copper vanadates and determined the optimum active phase (i.e., Cu3V2O8, denoted as Cu3) that revealed the greatest NH3-SCR performance, when combining with a proper Sb quantity of 1.4 wt. %. While using anatase (TiO2) as a support, this study investigated the effect of SOY 2− functionalization temperature on the surface property of the optimum catalyst, Sb-promoted Cu3V2O8 on TiO2 (Cu3-Sb1.4/TiO2). Cu3-Sb1.4/TiO2 was subjected to SOY 2− functionalization at 300, 400, and 500 °C, leading to the formation of S300, S400, and S500. Although the catalyst surface was not fully functionalized with the SOY 2− species in S300-S500, various metal sulfate or sulfite species appeared on the surfaces and showed distinct surface features. The SOY 2− functionalization of Cu3-Sb1.4/TiO2 could not increase the quantity of Lewis acid sites. However, 400 °C was deemed as an adequate SOY 2− functionalization temperature for increasing the quantity of Brӧnsted acid sites and the redox behavior of the intact Cu3-Sb1.4/TiO2. This could result from the increase in the surface abundance of Cu(SO4) or from a proper combination of the metal-bound SOY 2− species with mono-dentate and bi-dentate binding configurations. Apart from exhibiting moderate tolerance to hydrothermal aging, S400 was also validated to improve its resistance to alkali-metal, H2O, SO2, (NH4)2SO4, or (NH4)HSO4 in comparison to its SOY 2−-unfunctionalized counterpart, S300, and S500.

AB - SO2 is notorious to poison the catalytic surface during the selective catalytic reduction of NOX with NH3 (NH3-SCR). Nonetheless, the use of poisonous SO2 and O2 as surface modifiers to generate the surface metal-SOY 2− species (Y = 3 or 4) can be one of the viable ways for promoting catalytic NH3-SCR consequence. To develop a novel catalyst that is highly active in and selective to NH3-SCR, we previously explored four catalytic copper vanadates and determined the optimum active phase (i.e., Cu3V2O8, denoted as Cu3) that revealed the greatest NH3-SCR performance, when combining with a proper Sb quantity of 1.4 wt. %. While using anatase (TiO2) as a support, this study investigated the effect of SOY 2− functionalization temperature on the surface property of the optimum catalyst, Sb-promoted Cu3V2O8 on TiO2 (Cu3-Sb1.4/TiO2). Cu3-Sb1.4/TiO2 was subjected to SOY 2− functionalization at 300, 400, and 500 °C, leading to the formation of S300, S400, and S500. Although the catalyst surface was not fully functionalized with the SOY 2− species in S300-S500, various metal sulfate or sulfite species appeared on the surfaces and showed distinct surface features. The SOY 2− functionalization of Cu3-Sb1.4/TiO2 could not increase the quantity of Lewis acid sites. However, 400 °C was deemed as an adequate SOY 2− functionalization temperature for increasing the quantity of Brӧnsted acid sites and the redox behavior of the intact Cu3-Sb1.4/TiO2. This could result from the increase in the surface abundance of Cu(SO4) or from a proper combination of the metal-bound SOY 2− species with mono-dentate and bi-dentate binding configurations. Apart from exhibiting moderate tolerance to hydrothermal aging, S400 was also validated to improve its resistance to alkali-metal, H2O, SO2, (NH4)2SO4, or (NH4)HSO4 in comparison to its SOY 2−-unfunctionalized counterpart, S300, and S500.

KW - Antimony

KW - Copper vanadate

KW - CuVO

KW - Selective catalytic reduction of NO

KW - SO /SO functionalization

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