Effect of Silica on Nitrate-Incorporated Vanadia Catalysts in Low-Temperature Selective Catalytic Reduction of Nitrogen Oxides.
- 1Department of Mechanical Engineering, University of Kansas, Lawrence, Kansas 66045, United States.
- 2Department of Autonomous Manufacturing & Process R&D, Korea Institute of Industrial Technology, Ansan 15588, Republic of Korea.
- 3School of Advanced Materials & Electrical Engineering, Industrial Technology Center for Environment-Friendly Materials, Gyeongkuk National University, Andong 36729, Republic of Korea.
Abstract
Developing shaped catalysts for the low-temperature selective catalytic reduction (SCR) of NO x often results in severe physical detachment and efficiency loss. Building on our previous development of highly active nitrate-incorporated V₂O₅-WO₃/TiO₂ powder catalysts, we investigated the effect of SiO₂ as a structural binder for coating these catalysts onto glass fiber sheets. Coatings with 0-30 wt % SiO₂ were prepared and evaluated. The addition of 10 wt % SiO₂ significantly improved catalyst dispersion, coating uniformity, and mechanical adhesion, successfully preventing the structural degradation typically observed under highly humid operating conditions. Consequently, the SiO₂-containing catalyst demonstrated enhanced physical stability, maintaining consistent NO x removal efficiencies for at least 80 h, whereas the SiO₂-free coating showed progressive deactivation due to physical peeling. The optimized catalyst (10 wt % SiO₂, 4 wt % V₂O₅) achieved a 98.7% NO x removal efficiency at 180 °C under dry conditions and 95.2% in the presence of 10 vol % H₂O. These findings clearly demonstrate that SiO₂ acts as an exceptionally robust structural binder, effectively bridging the gap between highly active fundamental powders and macroscopically stable industrial applications.
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BibTeX
@article{kwon2026effect,
title = {{Effect of Silica on Nitrate-Incorporated Vanadia Catalysts in Low-Temperature Selective Catalytic Reduction of Nitrogen Oxides.}},
author = {Gibum Kwon and Shin Ae Song and Duck Hyun Lee},
journal = {ACS omega},
year = {2026},
month = sep,
doi = {10.1021/acsomega.6c06102},
url = {https://europepmc.org/article/MED/42924134},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Effect of Silica on Nitrate-Incorporated Vanadia Catalysts in Low-Temperature Selective Catalytic Reduction of Nitrogen Oxides.
AU - Gibum Kwon
AU - Shin Ae Song
AU - Duck Hyun Lee
PY - 2026
DA - 2026/09/29
JO - ACS omega
DO - 10.1021/acsomega.6c06102
UR - https://europepmc.org/article/MED/42924134
AB - Developing shaped catalysts for the low-temperature selective catalytic reduction (SCR) of NO x often results in severe physical detachment and efficiency loss. Building on our previous development of highly active nitrate-incorporated V₂O₅-WO₃/TiO₂ powder catalysts, we investigated the effect of SiO₂ as a structural binder for coating these catalysts onto glass fiber sheets. Coatings with 0-30 wt % SiO₂ were prepared and evaluated. The addition of 10 wt % SiO₂ significantly improved catalyst dispersion, coating uniformity, and mechanical adhesion, successfully preventing the structural degradation typically observed under highly humid operating conditions. Consequently, the SiO₂-containing catalyst demonstrated enhanced physical stability, maintaining consistent NO x removal efficiencies for at least 80 h, whereas the SiO₂-free coating showed progressive deactivation due to physical peeling. The optimized catalyst (10 wt % SiO₂, 4 wt % V₂O₅) achieved a 98.7% NO x removal efficiency at 180 °C under dry conditions and 95.2% in the presence of 10 vol % H₂O. These findings clearly demonstrate that SiO₂ acts as an exceptionally robust structural binder, effectively bridging the gap between highly active fundamental powders and macroscopically stable industrial applications.
SN - 2470-1343
ER -