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The effect of CNTs on V-Ce/TiO2 for low-temperature selective catalytic reduction of NO

  • Catalysis, Reaction Engineering
  • Published:
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Abstract

Carbon nanotubes (CNTs) are widely utilized as catalyst promoters because of their unique structure and electrical properties. In this study, CNTs were added as a promoter to V-Ce/TiO2 (VCT), which is a commercial catalyst used for the NH3-SCR reaction. We investigated the role of CNTs in the V-Ce/TiO2-CNTs (VCTC) catalyst. Therefore, we characterized them using X-ray diffraction (XRD), N2 adsorption/desorption experiments, thermogravimetric analysis (TGA), transmission electron microscopy (TEM), temperature-programmed reduction of H2 (H2-TPR), temperature-programmed desorption of NO/NH3 (NO/NH3-TPD), X-ray photoelectron spectroscopy (XPS), and in situ Fourier transform infrared spectroscopy (FT-IR). Higher NO conversion and N2 selectivity were achieved in the VCTC catalyst than in the VCT catalyst, confirming the favorable effect of CNTs on the NH3-SCR reaction. Additionally, CNTs considerably influenced the crystal structure formation of the metal oxides located on the catalyst surface. Consequently, metal-metal and metal-support undergo distinct interactions, thereby positively influencing catalytic characteristics such as redox properties, oxidation state, acid sites, and the formation of nitrate species.

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Abbreviations

VCT:

V-Ce/TiO2

VCTC:

V-Ce/TiO2-CNTs

SCR:

selective catalytic reduction

H2-TPR:

temperature-programmed reduction of H2

NO/NH3-TPD:

temperature-programmed desorption of NO/NH3

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Acknowledgements

This study was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (C2-2435); and this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A2C1009054).

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Author notes

  1. Jae-Rang Youn and Min-Jae Kim contributed equally to this work.

Authors and Affiliations

  1. Graduate School of Energy Science and Technology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea

    Jae-Rang Youn, Min-Jae Kim & Kyubock Lee

  2. Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Korea

    Jae-Rang Youn, Seung-Jae Lee, In-Soo Ryu, Soon Kwan Jeong & Sang Goo Jeon

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  1. Jae-Rang Youn
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  2. Min-Jae Kim
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Correspondence to Kyubock Lee or Sang Goo Jeon.

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Youn, JR., Kim, MJ., Lee, SJ. et al. The effect of CNTs on V-Ce/TiO2 for low-temperature selective catalytic reduction of NO. Korean J. Chem. Eng. 39, 2334–2344 (2022). https://doi.org/10.1007/s11814-022-1182-4

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  • DOI: https://doi.org/10.1007/s11814-022-1182-4

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