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Catalysis Letters

, Volume 117, Issue 1–2, pp 53–61 | Cite as

Powder and Monolith-Supported Sulphur Trap Materials Based on Modified Hydrotalcite-Derived Supports

  • Ellen Schreier
  • Reinhard Eckelt
  • Manfred Richter
  • Rolf Fricke
Article

Abstract

SO x traps were prepared using hydrotalcite materials of different composition and their SO x storage properties were monitored during temperature cycling (50–600 °C) under continuous feed streams (50 ppm SO2, 6 vol.% O2, 5 vol.% CO2, 100 ppm NO) at a space velocity of 144,000 L/(kg h). A comparison is made with non-hydrotalcite mixed oxide supports as well as pure alumina. The most promising material NaMnO x /Al2O3 was wash-coated on a cordierite core and its SO x trap capacity was compared with the performance of the powder and the slurry. The slurry as well as the monolith-supported material showed an SO2 uptake of 93% over 7 h time-on-stream corresponding to 20 wt.% sulphate. DRIFT spectroscopy revealed the prevailing sulphate formation on Mn-related sites and Na. Regeneration of the trap with CO/H2 (λ = 0.99) at 600 °C was not completely possible.

Keywords

Sulphur trap SOx trap Hydrotalcite Manganese Alkali metals Monolith 

Notes

Acknowledgment

The authors gratefully acknowledge financial support from the European Commission in the frame of the NANOSTRAP project (G3RD-CT2002-00793).

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Ellen Schreier
    • 1
  • Reinhard Eckelt
    • 1
  • Manfred Richter
    • 1
  • Rolf Fricke
    • 1
  1. 1.Leibniz Institute for CatalysisBranch Berlin (former ACA)BerlinGermany

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