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Promoting Effect of CeO2 on NO x Reduction with Propene over SnO2/Al2O3 Catalyst Studied with In situ FT-IR Spectroscopy

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Abstract

The mechanistic cause of the promoting effect of CeO2 on the activity of SnO2/Al2O3 catalyst for the SCR of NO x by propene was investigated using X-ray photoelectron spectra (XPS) and in situ Fourier transform infrared (FT-IR) spectroscopy. FT-IR measurements have revealed that the role of CeO2 on the CeO2–SnO2/Al2O3 catalyst is to contribute to the formation of formate, acetate and nitrate species, and to promote the reaction between nitrates and hydrocarbon-derived species to form isocyanate (–NCO), which is a reaction intermediate for NO x reduction.

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Acknowledgements

This research was funded by the Center for Ultramicrochemical Process Systems (CUPS) supported by KOSEF (2005) and Z. Liu was supported by BK21 postdoctoral fellowship.

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Authors and Affiliations

  1. Department of Chemical and Biomolecular Engineering, Center for Ultramicrochemical Process Systems, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon, 305-701, Korea

    Zhiming Liu, Kwang Seok Oh & Seong Ihl Woo

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  1. Zhiming Liu
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  2. Kwang Seok Oh
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  3. Seong Ihl Woo
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Correspondence to Seong Ihl Woo.

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Liu, Z., Oh, K.S. & Woo, S.I. Promoting Effect of CeO2 on NO x Reduction with Propene over SnO2/Al2O3 Catalyst Studied with In situ FT-IR Spectroscopy. Catal Lett 120, 143–147 (2008). https://doi.org/10.1007/s10562-007-9266-7

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