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Comparison between ammonia and propene as the reducing agent in the selective catalytic reduction of NO under lean conditions over Pt black

Filip Acke (Institutionen för oorganisk miljökemi ; Kompetenscentrum katalys (KCK)) ; Magnus Skoglundh (Institutionen för teknisk ytkemi ; Kompetenscentrum katalys (KCK))
Applied Catalysis B: Environmental (0926-3373). Vol. 20 (1999), 2, p. 133-144.
[Artikel, refereegranskad vetenskaplig]

The catalytic activity of Pt black towards the reduction of NO under lean conditions is examined. Ammonia and propene are tested as reducing agents. A scrambling between nitrogens is observed in the formation of N2 and N2O for NH3. For C3H6, a reduction of NO to mainly N2O is found. A minor formation of N2 is only observed for high C3H6 concentrations. The role of NO2 as an intermediate in the reduction of NO is examined by using a feed gas mixture containing NO2, as well as by studying the catalytic activity of Pt black towards the NO-O2 and NO2-O2 reactions. No effect is observed in the maximum NOx conversion for C3H6 whereas for NH3 a decreased activity is found. The presented results are put in perspective of the reaction mechanisms proposed in the literature.

Nyckelord: catalytic activity; Pt black; nitrogen oxides; NH3; propene; NO reduction; SCR



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Denna post skapades 2012-01-27. Senast ändrad 2012-02-12.
CPL Pubid: 154467

 

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Institutioner (Chalmers)

Institutionen för oorganisk miljökemi (1900-2004)
Kompetenscentrum katalys (KCK)
Institutionen för teknisk ytkemi (1999-2003)

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