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Deactivation characteristics inn-heptane reforming reaction catalyzed over small Pt, Ir and Pt-Ir bimetallic clusters in NaY

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Abstract

The deactivation characteristics of highly dispersed (about 1 nm) Pt, Ir and Pt-Ir bimetallic clusters in NaY were studied by hydrogen chemisorption, coke analysis and temperature programmed oxidation of used catalyst inn-heptane reforming reaction. As the Ir content was increased, the amount of coke decreased. Most of coke was located around the metal cluster and this coke decreased the selectivity of dehydrocyclization inn-heptane reaction. The higher activity and more improved activity maintenance of Pt-Ir/NaY bimetallic catalysts than those of Pt/NaY are related to the less amount of coke formation.

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Author notes

  1. O. Bong Yang

    Present address: Chemical Engineering Division, RIST, PO Box 135, 790-600, Pohang, Korea

Authors and Affiliations

  1. Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 305-701, Taejon, Korea

    O. Bong Yang, Seong Ihl Woo & In Chul Hwang

Authors
  1. O. Bong Yang
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  2. Seong Ihl Woo
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  3. In Chul Hwang
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Yang, O.B., Woo, S.I. & Hwang, I.C. Deactivation characteristics inn-heptane reforming reaction catalyzed over small Pt, Ir and Pt-Ir bimetallic clusters in NaY. Catal Lett 19, 239–245 (1993). https://doi.org/10.1007/BF00771760

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  • DOI: https://doi.org/10.1007/BF00771760

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