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Zeolite H-ZSM-5: A Microporous Proton Conductor for the in situ Monitoring of DeNOx-SCR

Published online by Cambridge University Press:  30 August 2011

Thomas Simons  and
Ulrich Simon
Thomas Simons
Affiliation:
Institut für Anorganische Chemie and JARA – Future Information Technology, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
Ulrich Simon
Affiliation:
Institut für Anorganische Chemie and JARA – Future Information Technology, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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Abstract

Impedance spectroscopy was applied on zeolite H-ZSM 5 as a proton conducting NH3 sensor material and DeNOx-SCR (selective catalytic reduction of NOx with NH3) catalysts at the same time under SCR conditions. We show that in situ monitoring of the NH3 conversion with NOx becomes feasible when the zeolite is loaded with NH3 first and NOx is applied afterwards to the gas phase. Temperature dependent measurements allow discriminating NH3 desorption from catalytic conversion and time dependent measurement give first hints on the thermal activation of the conversion.

Keywords

zeoliteionic conductorcatalytic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1330: Symposium J – Protons in Solids , 2011 , mrss11-1330-j01-03-k03-03
Copyright
Copyright © Materials Research Society 2011

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References

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