REDUÇÃO CATALITICA SELETIVA DE ÓXIDOS DE NITROGÊNIO SOBRE HEMATITA CONTENDO COBRE

H. SOUSA FERREIRA, S. J. OLIVEIRA, M. DO CARMO RANGEL, E. A. URQUIETA-GONZÁLEZ, L. MARTINS, J. L. GARCIA FIERRO E S. G. MARCHETTI.

QUíMICA NOVA

The Scientific Electronic Library Online - SciELO

Año: 2007 vol. 30 p. 611 - 615

0100-4042

THE SELECTIVE CATALYTIC REDUCTION OF NO OVER COPPER-CONTAINING HEMATITE. The activity of copper-doped hematite in the SCR with propane, in the presence of oxygen, was evaluated in this work. It was found that copper sulfate led to the production of solids with different specific surface areas depending on the amount of copper. The sulfur and copper species were mainly located on the surface. The copper-containing catalysts were more active in the reduction of nitrogen oxides and less active in the propane oxidation as compared to pure hematite. This behavior was assigned to an association of both sulfur and copper species to produce new sites active for NO reduction.