Characterization of the role of Pt on CoPt and InPt Ferrierite Activity and Stability upon the SCR of NO with CH4

LAURA GUTIERREZ; LAURA CORNAGLIA, ; E. MIRÓ; J. PETUNCHI

Studies in Surface Science and Catalysis

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Lugar: Amsterdam; Año: 2000; p. 1535 - 1540

The selective catalytic reduction (SCR) of NO? with CH4 in excess of oxygen was studied over a series of ferrierite-supported monometallic (Co, In or Pt) and bimetallic (Pt-Co or Pt-In) catalysts. Pt promoted the NOx to N2 conversion of both Co and In ferrierite aider the samples were reduced with 1-12 at 350~ either under dry or wet reaction stream. The addition of 2% of water to the feed stream also increased the activity of the calcined PtlnFerrierite for the said reaction. Temperature Programmed Reduction and XPS results show the presence of Co0, Pt0, Co +2, Pt +2 and In at exchange position in the samples with the highest activity and selectivity for the SCR of NO.