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Hydrogen as a remedy for the detrimental effect of aromatic and cyclic compounds on the HC-SCR over Ag/alumina

Paper ID Volume ID Publish Year Pages File Format Full-Text
48783 46522 2007 8 PDF Available
Title
Hydrogen as a remedy for the detrimental effect of aromatic and cyclic compounds on the HC-SCR over Ag/alumina
Abstract

The effect of hydrogen on the selective catalytic reduction of NOx with n-octane, methylcyclohexane and toluene over a 2 wt.% Ag/Al2O3 was investigated. Diesel fuels contain, in addition to straight hydrocarbons, varying amounts of cyclic and aromatic compounds, which have a detrimental effect on the Ag/Al2O3 catalyst activity. The results showed that the NO to N2 conversion was significantly promoted, independent of the nature (straight, cyclic or aromatic) of the hydrocarbon, in the presence of 1 vol.% H2. The role of hydrogen is connected to a faster oxidation of the hydrocarbons and to enhanced formation of amines, which react with activated NO to form N2.

Keywords
HC-SCR; Ag/alumina; NOx reduction; Diesel; Aromatics; Hydrogen effect
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Hydrogen as a remedy for the detrimental effect of aromatic and cyclic compounds on the HC-SCR over Ag/alumina
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 70, Issues 1–4, 31 January 2007, Pages 65–72
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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