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Methanol Assisted Lean NOx Reduction Over Ag-Al2O3-Influence of Hydrogen and Silver Loading

Marika Männikkö ; Magnus Skoglundh (Institutionen för kemi och kemiteknik, Teknisk ytkemi ; Kompetenscentrum katalys (KCK)) ; Hanna Härelind (Institutionen för kemi och kemiteknik, Teknisk ytkemi ; Kompetenscentrum katalys (KCK))
Topics in catalysis (1022-5528). Vol. 58 (2015), 14-17, p. 977-983.
[Artikel, refereegranskad vetenskaplig]

The influence of hydrogen and silver loading on lean NOx reduction with methanol over Ag-Al2O3 are investigated by flow-reactor experiments, H-2-TPR, TEM and XPS. Reduction of silver at low temperatures over Ag-Al2O3 with high silver loading, suggests involvement of silver species/particles that are large (which is supported by the TEM analysis) and/or loosely bound to the support. The silver species reduced by hydrogen cannot be directly associated with the activity for NOx reduction under methanol-SCR conditions. Furthermore, the activity for NOx reduction increases slightly at low temperatures when hydrogen is added to the feed. However, also without co-fed hydrogen, a high low-temperature activity is achieved for methanol assisted lean NOx reduction over Ag-Al2O3.

Nyckelord: Methanol, Hydrogen, Lean NOx reduction, Ag/Al2O3, Silver



Denna post skapades 2015-11-09.
CPL Pubid: 225485

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Teknisk ytkemi
Kompetenscentrum katalys (KCK)

Ämnesområden

Kemi

Chalmers infrastruktur