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Pt-V2O5-WO3/TiO2 catalysts supported on SiC filter for NO reduction at low temperature

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Abstract

The catalytic filter, V2O5-WO3-TiO2 supported on a ceramic filter, is known as a promising material for treating particulates and NO x simultaneously at optimum temperatures around 320°C. In order to improve its catalytic activity at low temperatures, the effect of Pt addition on the catalytic filter has been investigated. Catalytic filters, Pt-V2O5-WO3-TiO2/SiC, were prepared by co-impregnation of Pt, V, and W precursors on TiO2 coated-SiC filter by vacuum aided-dip coating. The Pt-added catalytic filter shifted the optimum working temperature from 280–330°C (for the non Pt-impregnated filter) to 180–230°C, providing N x slip concentration less than 20 ppm for the treatment of 700 ppm NO at a face velocity of 2 cm/s with the same value over the non Pt-added catalytic filters. The promotional effect following the addition of Pt is believed to result from electrical modification of the catalyst maintaining a high electron transfer state. Ammonia oxidation was also observed to be dominant above the optimal temperature for SCR.

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Authors and Affiliations

  1. Department of Chemical and Biological Engineering/ERI, Gyeongsang National University, 900 Gazwa-Dong, 660-701, Jinju, Korea

    Joo-Hong Choi, Jin-Hyun Kim, Young-Cheoul Bak, Rose Amal & Jason Scott

  2. School of Chemical Engineering and Industrial Chemistry, The University of New South Wales, 2052, Sydney, NSW, Australia

    Rose Amal & Jason Scott

Authors
  1. Joo-Hong Choi
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  2. Jin-Hyun Kim
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  3. Young-Cheoul Bak
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  4. Rose Amal
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  5. Jason Scott
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Correspondence to Joo-Hong Choi.

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Choi, JH., Kim, JH., Bak, YC. et al. Pt-V2O5-WO3/TiO2 catalysts supported on SiC filter for NO reduction at low temperature. Korean J. Chem. Eng. 22, 844–851 (2005). https://doi.org/10.1007/BF02705663

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  • DOI: https://doi.org/10.1007/BF02705663

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