Selective catalytic reduction of nitric oxide by propene over In2O3–Ga2O3/Al2O3 nanocomposites

Summary In 2 O 3 –Ga 2 O 3 /Al 2 O 3 nanocomposite catalysts combined the advantages of good propene selectivity offered by Ga 2 O 3 /Al 2 O 3 and high propene conversion provided by In 2 O 3 /Al 2 O 3 to yield catalysts with excellent de-NO x activity. A high NO conversion to N 2 of 80% was achieved over the catalyst with 2 wt% In and 8 wt% Ga. This NO conversion was attained even in the presence of 15% O 2 and 10% H 2 O. The In 2 O 3 –Ga 2 O 3 /Al 2 O 3 nanocomposite remained active in the presence of SO 2 . This combination of high activity, hydrothermal stability and sulfur resistance made our nanocomposite catalysts very interesting for applications in the selective catalytic reduction (SCR) of NO x .