Effects of alkali metals on catalyst of MnOx-CeO2/ZrO2-PILC in the low-temperature selective catalytic reduction

SHEN Bo-xiong; CHEN Jian-hong; YAO Yan; HU Guo-li

Volume 40 Issue 12

Dec. 2012

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SHEN Bo-xiong, CHEN Jian-hong, YAO Yan, HU Guo-li. Effects of alkali metals on catalyst of MnOx-CeO2/ZrO2-PILC in the low-temperature selective catalytic reduction[J]. Journal of Fuel Chemistry and Technology, 2012, 40(12): 1487-1491.

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SHEN Bo-xiong, CHEN Jian-hong, YAO Yan, HU Guo-li. Effects of alkali metals on catalyst of MnO_x-CeO₂/ZrO₂-PILC in the low-temperature selective catalytic reduction[J]. Journal of Fuel Chemistry and Technology, 2012, 40(12): 1487-1491.

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Effects of alkali metals on catalyst of MnO_x-CeO₂/ZrO₂-PILC in the low-temperature selective catalytic reduction

College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China

Received Date: 2012-02-08
Rev Recd Date: 2012-05-28
Publish Date: 2012-12-31

Abstract

Abstract

The poisoning effects of alkali metals on low-temperature selective catalytic reduction (SCR) catalyst MnO_x-CeO₂/ZrO₂-PILC were invested by the method of impregnation in the laboratory. It was indicated that the addition of Ca/Mg would decrease the activities of the catalyst, and the poisoning effects were contacted with the amount and acidity of the doped-alkali metal. X-ray diffraction (XRD), H₂-temperature programmed reduction (H₂-TPR), N₂adsorption-desorption and temperature-programmed desorption of NH₃ (NH₃-TPD) were used to characterize the properties of the fresh and alkali earth doped catalysts. According to the results, the doped-alkali metals would inhibit the reduction properties, induce the loss in surface area and surface acidity.
- low-temperature selective catalyst reduction,
- zirconia-pillared interlayered clay,
- MnO_x,
- CeO₂,
- alkali earth metal,
- poisoning

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References

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