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Catalytic reduction of NOx over transition-metal-containing MCM-41

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Abstract

The catalytic properties of Pt, Rh and Co supported on mesoporous molecular sieves with MCM-41-type structure consisting of SiO2 and Al2O3 were studied for the reduction of NO with propene. Pt supported on siliceous MCM-41 was the most active catalyst, however, significant quantities of undesirable N2O were formed during the reaction. Pt supported on mesoporous Al2O3 and Rh supported on both mesoporous oxides showed a lower activity, but an improved selectivity towards N2 formation. Co supported on MCM-41-type materials had only a low level of activity for the reduction of NO with propene. For Pt supported on MCM-41-type materials only a minor decrease in the activity was observed when water vapor was added into the reactant gas mixture, while on Rh- and Co-containing catalysts the activity strongly decreased.

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Authors and Affiliations

  1. Institute for Physical Chemistry, Vienna University of Technology, Getreidemarkt 9/156, A-1060, Wien, Austria E-mail:

    Walter Schießer, Hannelore Vinek & Andreas Jentys

Authors
  1. Walter Schießer
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  2. Hannelore Vinek
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  3. Andreas Jentys
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Schießer, W., Vinek, H. & Jentys, A. Catalytic reduction of NOx over transition-metal-containing MCM-41. Catalysis Letters 56, 189–194 (1998). https://doi.org/10.1023/A:1019081717797

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