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Characterization of a Real Size Retrofittable Catalytic Combustion System

[+] Author Affiliations
Olaf Diers, Michael Fischer, Johannes Heinze, Johan Koopman, Denis Schneider, Christoph Hassa

German Aerospace Center (DLR), Köln, Germany

Markus J. Friedl

Awtec, Zürich, Switzerland

Richard Carroni

Alstom, Birr, Switzerland

Paper No. GT2008-50516, pp. 409-418; 10 pages
doi:10.1115/GT2008-50516
From:
  • ASME Turbo Expo 2008: Power for Land, Sea, and Air
  • Volume 3: Combustion, Fuels and Emissions, Parts A and B
  • Berlin, Germany, June 9–13, 2008
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4313-0 | eISBN: 0-7918-3824-2
  • Copyright © 2008 by Alstom, awtec, DLR

abstract

This contribution describes the investigation of an engine-scale catalytic hybrid burner. The burner has been investigated under atmospheric conditions with preheated air and natural gas fuel in two operating points, with and without the catalytic reactor. By using the catalyst, an extension of the operating range to leaner stoichiometries has been demonstrated. Exhaust gas analysis performed directly downstream of the burner as well as in the burner far-field showed a NOx reduction potential of more than 20% when employing the catalyst. For the operation with the catalytic reactor, the flame stabilization process and dependency of NOx formation on the piloting gas ratio is described with results of OH chemiluminescence measurements. Radial temperature profiles taken with Coherent Anti Stokes Raman Scattering (CARS) suggest a reaction delay directly downstream of the catalytic section of the burner. Calculations with a perfectly stirred reactor model help to obtain a better understanding of the kinetics of the hot gases leaving the catalyst section.

Copyright © 2008 by Alstom, awtec, DLR

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