Abstract
This research is conducted to improve the dispersion of MnOx–CeO2 catalyst because manganese is easily aggregated during continuous thermal environment at operating temperature. Aggregated MnOx particles on the support can be a major reason to degrade the catalyst performance. Therefore, the improved dispersion of MnOx particles leads to the enhancement of the catalyst performance by utilizing hexagonal boron nitride (h-BN) which is well known as thermally stable material. Due to the dispersion of MnOx–CeO2 with 5–20 nm particle size, h-BN-supported MnOx–CeO2 catalyst shows the 93% efficiency in NOx removal at 200 °C. The structure and properties of MnOx–CeO2/h-BN catalyst are characterized by X-ray diffraction, Fourier transform infrared spectroscopy spectra, and NH3-temperature programmed desorption. Then, NOx removal efficiency of catalyst is evaluated on a fixed bed reactor and h-BN-supported catalyst, (Mn0.2–Ce0.1)/BN, increases NOx removal efficiency up to 20% at 200 °C in spite of 2/3 reduced content of MnOx–CeO2 compared to no-supported catalyst (Mn0.3–Ce0.15).
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Lee, Mj., Kim, DH., Lee, M. et al. Enhanced NOx removal efficiency for SCR catalyst of well-dispersed Mn-Ce nanoparticles on hexagonal boron nitride. Environ Sci Pollut Res 26, 36107–36116 (2019). https://doi.org/10.1007/s11356-019-04619-y
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DOI: https://doi.org/10.1007/s11356-019-04619-y