Abstract
Black rock series (BRS) is of great potential for their plenty of valued oxides which include vanadium, iron, alumina and silica oxides, etc. BRS was used for directly preparing of selective catalytic reduction (SCR) catalyst by modifying its surface texture with SiO2-TiO2 sols and regulating its catalytic active constituents with V2O5 and MoO3. Consequently, 90% NO removal ratio was obtained within 300–400 °C over the BRS-based catalyst. The structure and properties of the BRS-based catalyst were characterized by the techniques of N2 adsorption–desorption, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), H2-temperature programmed reduction (H2-TPR), and NH3-temperature programmed desorption (NH3-TPD). The results revealed that the BRS-based catalyst possesses favorable properties for NO x removal, including highly dispersed active components, abundant surface-adsorbed oxygen Oα, well redox property, and numerous Brønsted acid sites. Particularly, the BRS-based catalyst exhibited considerable anti-poisoning performance compared with commercial TiO2-based catalyst. The former catalyst shows a NO conversion surpassing 80% from 300 to 400 °C for potassium poisoning, and a durability of SO2 and H2O exceeding 85% at temperatures from 300 to 450 °C.
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Acknowledgements
This study was supported by the Chongqing Administration of Land, Resources and Housing (no. KJ-2015021).
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Responsible editor: Suresh Pillai
Highlights
• Black rock series (BRS) was applied for the deNO x catalyst preparation without pre-separations.
• The prepared catalyst showed good deNO x activity and resistance to alkali metals, SO2, and steam poisoning.
• The method provides a new route to fully utilize BRS and develop a low-cost NH3-SCR catalyst.
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Xie, B., Luo, H., Tang, Q. et al. The black rock series supported SCR catalyst for NO x removal. Environ Sci Pollut Res 24, 21761–21769 (2017). https://doi.org/10.1007/s11356-017-9622-0
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DOI: https://doi.org/10.1007/s11356-017-9622-0