Cesium as Alkali Promoter in Me-Cs Me = Cu, Co, Fe- Al2O3 Structured Catalysts for the Simultaneous Removal of Soot and NOxReportar como inadecuado




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Structured catalysts for the simultaneous removal of soot and nitrogen oxides were prepared by means of coating cordierite monoliths with alumina-based suspensions containing Cu, Co or Fe and Cs as the catalytically active phase. Textural and chemical properties of the coated monoliths were determined by means of N2-physisorption, SEM and temperature programmed reduction. Their activity in the simultaneous removal of soot and NOx was assayed in a lab-scale installation, using a carbon black as diesel surrogate. Catalysts containing Cs exhibited significant activity in deNOx, however soot oxidation activity is poorly enhanced probably due to the low NO2 evolution, pointing to a different NOx adsorption mechanism in the present case, in comparison to previous observations on analogous K and Ba containing catalysts.

KEYWORDS

Exhaust Gas Cleaning; NOx Selective Reduction; Soot Oxidation; Cesium; Washcoating; Structured Catalysts

Cite this paper

S. Ascaso, M. Gálvez, R. Moliner and M. Lázaro -Cesium as Alkali Promoter in Me-Cs Me = Cu, Co, Fe- Al2O3 Structured Catalysts for the Simultaneous Removal of Soot and NOx,- Modern Research in Catalysis, Vol. 2 No. 3, 2013, pp. 57-62. doi: 10.4236-mrc.2013.23009.





Autor: Sonia Ascaso, María Elena Gálvez, Rafael Moliner, María Jesús Lázaro

Fuente: http://www.scirp.org/



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