Lean NOx Reduction in Two Stages: Non-thermal Plasma Followed by Heterogeneous Catalysis

We present data in this paper showing that non-thermal plasma in combination with heterogeneous catalysis is a promising technique for the treatment of NOx in diesel exhaust. Using a commonly available zeolite catalyst, sodium Y, to treat synthetic diesel exhaust we report approximately 50% chemical...

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Bibliographic Details
Published in:SAE transactions 2000-01, Vol.109, p.2737-2743
Main Authors: Tonkyn, Russell, Yoon, Steven, Barlow, S.E., Panov, Alexander, Kolwaite, Ana, Balmer, M. Lou
Format: Article
Language:English
Subjects:
Catalysts
Cold plasmas
Diesel exhaust
Helium
Hydrocarbons
Nitrogen
Nitrogen balance
Oxygen
Propylene
Temperature dependence
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Summary:We present data in this paper showing that non-thermal plasma in combination with heterogeneous catalysis is a promising technique for the treatment of NOx in diesel exhaust. Using a commonly available zeolite catalyst, sodium Y, to treat synthetic diesel exhaust we report approximately 50% chemical reduction of NOx over a broad, representative temperature range. We have measured the overall efficiency as a function of the temperature and hydrocarbon concentration. The direct detection of N₂ and N₂O when the background gas is replaced by helium confirms that true chemical reduction is occurring.
ISSN:0096-736X
2577-1531