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International Journal of Energy for a Clean Environment

Publication de 8  numéros par an

ISSN Imprimer: 2150-3621

ISSN En ligne: 2150-363X

SJR: 0.597 SNIP: 1.456 CiteScore™:: 3.7 H-Index: 18

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DIESEL EXHAUST EMISSION CONTROL BY SELECTIVE CATALYTIC REDUCTION OF NOX WITH AMMONIA ON METAL/ZEOLITE CATALYSTS

Volume 10, Numéro 1-4, 2009, pp. 103-120
DOI: 10.1615/InterJEnerCleanEnv.v10.i1-4.60
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RÉSUMÉ

The heavy-duty diesel (HDD) and light-duty diesel (LDD) have been required to meet diesel mission standards that will become mandatory worldwide in the next few years (i.e., Euro 6 for Europe and Tier 2 for USA light-duty vehicles). Currently, selective catalytic reduction (SCR) of NOx, with urea (commercially known as AdBlue) as a reducing agent, has been employed in the NOx emission control of HDD. The commercial catalyst used is based on V2O5-WO3-TiO2, but the V2O5 must be replaced because of its toxicity. Catalysts based on metal-exchanged zeolite have been widely studied due to their high catalytic activity and stability for SCR- NOx. The catalysts, based on the ZSM-5 zeolite (CuZSM5 and FeZSM5) and Cuban natural mordenite (CuMORD), have been prepared by a conventional ion-exchange method and tested in the SCR of NOx with ammonia in presence of water vapor and SO2. This paper deals with these experimental results and will exploit a neural network based on the approach to predict the NO conversion efficiency of a commercial catalyst and implement the derived mathematical function into a numerical model for diesel road vehicle simulation. Light-duty and heavy-duty vehicles are going to be simulated in both congested and noncongested roads to analyze the SCR system behavior in such conditions.

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