Process for the treatment of gases with high oxygen content, with a view to controlling nitrogen oxide emissions, using a catalytic composition comprising cerium oxide and/or zirconium oxide

摘要

The invention relates to a process for the treatment of gases with high oxygen content, with a view to controlling nitrogen oxide emissions, characterized in that use is made of a catalytic composition comprising manganese oxide and at least one oxide chosen from cerium oxide and zirconium oxide. This composition may furthermore comprise at least one other element chosen from those in groups VIII, IB, IVB and VB. The process of the invention applies in particular to the treatment of exhaust gases of internal-combustion engines, more particularly diesel engines or lean-burn engines.