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Direct Catalyst Monitoring by Electrical Means: An Overview on Promising Novel Principles

Topics in Catalysis volume 52, pages 2035–2040 (2009)Cite this article

Abstract

By measuring the electrical properties of the catalyst coating itself, one can observe directly and in situ the state of TWC, LNT, and SCR catalysts. Two principles are possible: a contact method, for which the coating is applied to planar electrodes and the electrical impedance is measured, and a non-contact method, in which the coating material is penetrated by radio frequency waves. In either case, the catalyst state is directly correlated with the measured transmission or reflection characteristics of the electrical sensors.

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Acknowledgment

The authors are indebted to Umicore (Dr. J. Gieshoff, Dr. U. Göbel, Dr. M. Rösch, Dr. M. Votsmeier) for providing catalyst samples.

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Authors and Affiliations

  1. Bayreuth Engine Research Center, 95440, Bayreuth, Germany

    Ralf Moos, Marion Wedemann, Matthias Spörl, Sebastian Reiß & Gerhard Fischerauer

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  1. Ralf Moos
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  2. Marion Wedemann
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  3. Matthias Spörl
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  4. Sebastian Reiß
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  5. Gerhard Fischerauer
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Correspondence to Ralf Moos.

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Moos, R., Wedemann, M., Spörl, M. et al. Direct Catalyst Monitoring by Electrical Means: An Overview on Promising Novel Principles. Top Catal 52, 2035–2040 (2009). https://doi.org/10.1007/s11244-009-9399-6

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Keywords

  • Catalyst status detection
  • On-Board Diagnosis (OBD)
  • Exhaust gas sensor
  • TWC
  • LNT