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Wide Temperature Window in the Catalytic Activity of Novel Pt/ZSM-5 Prepared by a Sublimation Method for Selective Catalytic Reduction of NO

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Abstract

The removal of nitric oxide from the exhaust gas of lean-burn engines is not fully commercialized since the current catalyst technology cannot meet the strict future emission regulations. Although ZSM-5 ion-exchanged with Pt (Pt/ZSM-5) has been considered as a promising catalyst due to its superior low-temperature activity, it has the drawback of a narrow “temperature window” for activity, i.e. an abrupt decrease in the activity above 300 °C. This paper reports on the preparation of novel Pt/ZSM-5 by subliming Pt(CO)2Cl2 into H-ZSM-5 at 220 °C, resulting in excellent activity within a wide temperature window between 230 and 500 °C. Pre-treatment of this Pt/ZSM-5 can change the width of the temperature window. Moreover, H2O plays a role as a promoter and SO2 reversibly reduces the activity by less than 20%.

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Authors and Affiliations

  1. Department of Chemical & Biomolecular Engineering and Center for Ultramicrochemical Process Systems, Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong-gu Taejon, 305-701, Korea

    Seong Ihl Woo, Do Kyoung Kim & Myoung Rae Kim

  2. Division of Advanced Chemical Technology, Korea Research Institute of Chemical Technology, Yusong, PO Box 107, Taejon, 305-600, Korea

    Yong Ki Park

  3. Faculty of Chemistry, A.Mickiewicz University, Poznan, Poland

    Piotr Decyk

Authors
  1. Seong Ihl Woo
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  2. Do Kyoung Kim
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  3. Yong Ki Park
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  4. Myoung Rae Kim
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  5. Piotr Decyk
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Correspondence to Seong Ihl Woo.

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Woo, S.I., Kim, D.K., Park, Y.K. et al. Wide Temperature Window in the Catalytic Activity of Novel Pt/ZSM-5 Prepared by a Sublimation Method for Selective Catalytic Reduction of NO. Catalysis Letters 85, 69–72 (2003). https://doi.org/10.1023/A:1022168707843

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