The lean-deNO(x) activity of Ag/Al2O3, Ag/Ce0.16Zr0.84O2, and Ag/ZrO2 was compared. The activity data showed that by supporting Ag on ZrO2-containing supports, low-temperature deNO(x) activity is greatly improved compared to Ag/Al2O3. TEM investigation suggested that the support is at the origin of this shift of activity to low temperature rather than in the presence of large Ag particles. More important, use of Ce0.16Zr0.84O2 and ZrO2 as supports confers improved sulphur resistance compared to Al2O3-based materials in that regeneration of the SO2-poisoned catalyst may be achieved under moderate conditions. (C) 2002 Elsevier Science (USA).
Improvement of SOx-resistance of silver lean-DeNO(x) catalysts by supporting on CeO2-containing zirconia / N. Hickey, P. Fornasiero, J. Kaspar, M. Graziani, G. Martra, S. Coluccia, S. Biella, L. Prati, M. Rossi. - In: JOURNAL OF CATALYSIS. - ISSN 0021-9517. - 209:1(2002), pp. 271-274.
Improvement of SOx-resistance of silver lean-DeNO(x) catalysts by supporting on CeO2-containing zirconia
L. PratiPenultimo
;M. RossiUltimo
2002
Abstract
The lean-deNO(x) activity of Ag/Al2O3, Ag/Ce0.16Zr0.84O2, and Ag/ZrO2 was compared. The activity data showed that by supporting Ag on ZrO2-containing supports, low-temperature deNO(x) activity is greatly improved compared to Ag/Al2O3. TEM investigation suggested that the support is at the origin of this shift of activity to low temperature rather than in the presence of large Ag particles. More important, use of Ce0.16Zr0.84O2 and ZrO2 as supports confers improved sulphur resistance compared to Al2O3-based materials in that regeneration of the SO2-poisoned catalyst may be achieved under moderate conditions. (C) 2002 Elsevier Science (USA).
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