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

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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.

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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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Correspondence to Manfred Richter.

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Schreier, E., Eckelt, R., Richter, M. et al. Powder and Monolith-Supported Sulphur Trap Materials Based on Modified Hydrotalcite-Derived Supports. Catal Lett 117, 53–61 (2007). https://doi.org/10.1007/s10562-007-9150-5

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  • DOI: https://doi.org/10.1007/s10562-007-9150-5

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