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, EDUARDO MIRÓ, JUAN PETUNCHI

STUDIES IN SURFACE SCIENCE AND CATALYSIS

Elsevier

Año: 2000 vol. 130 p. 1535 - 1540

0039-3037

The selective catalytic reduction (SCR) of NOx  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 Co ~ Pt ~ Co +2, Pt +2 and In at exchange position in the samples with the highest activity and selectivity for the SCR of NOx.