Hydrogen as a remedy for the detrimental effect of aromatic and cyclic compounds on the HC-SCR over Ag/alumina |
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| Authors: | Kalle Arve, Henrik Backman, Fredrik Klingstedt, Kari Er nen,Dmitry Yu. Murzin |
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| Affiliation: | aLaboratory of Industrial Chemistry, Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo/Turku, Finland |
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| 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. |
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| Keywords: | HC-SCR Ag/alumina NOx reduction Diesel Aromatics Hydrogen effect |
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