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- W2989622079 abstract "Ca/ZrCu/ZSM-5 catalysts containing different Zr contents were prepared by incipient wetness impregnation. The catalysts were tested for the selective catalytic reduction (SCR) of NO x with ammonia and characterized by N2-BET, N2O titration, XRD, NH3-TPD, H2-TPR, and XPS techniques. In the temperature range of 100-170 °C, after calcium impregnation, NO x conversion over the Cu/ZSM-5 catalyst decreased by 11.3-24.3%, while that over Zr0.10/Cu/ZSM-5 only decreased by 3.8-12.2%. The improvement of the calcium poisoning resistance of the ZrCu/ZSM-5 catalyst is mainly attributed to an increase in the dispersion and the surface concentration of Cu. Moreover, the addition of zirconium promotes the reduction of CuO by decreasing the interaction between CuO and CaO, which also contributes to the improvement of resistance to CaO poisoning. The apparent activation energy and turnover frequency for the SCR reaction over the Ca/Zr x Cu/ZSM-5 catalysts were calculated and discussed." @default.
- W2989622079 created "2019-12-05" @default.
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- W2989622079 date "2019-01-01" @default.
- W2989622079 modified "2023-10-14" @default.
- W2989622079 title "Enhanced resistance to calcium poisoning on Zr-modified Cu/ZSM-5 catalysts for the selective catalytic reduction of NO with NH<sub>3</sub>" @default.
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- W2989622079 doi "https://doi.org/10.1039/c9ra07722g" @default.
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