CAUSES OF DEACTIVATION AND REGENERATION OF AN INDUSTRIAL PT-NIO AL2O3NITROGEN-OXIDES REDUCTION CATALYST/

Authors
ANGELIDIS TN PAPADAKIS VG PAVLIDOU E
Citation
Tn. Angelidis et al., CAUSES OF DEACTIVATION AND REGENERATION OF AN INDUSTRIAL PT-NIO AL2O3NITROGEN-OXIDES REDUCTION CATALYST/, Applied catalysis. B, Environmental, 4(4), 1994, pp. 301-313
Citations number
10
Categorie Soggetti
Chemistry Physical","Engineering, Environmental
Journal title
Applied catalysis. B, Environmental → ACNP
ISSN journal
09263373
Volume
4
Issue
4
Year of publication
1994
Pages
301 - 313
Database
ISI
SICI code
0926-3373(1994)4:4<301:CODARO>2.0.ZU;2-X
Abstract
The deactivation mechanism and regeneration of spent industrial Pt-NiO /Al2O3 catalysts used for NO(x) reduction was studied by means of SEM- EDS, chemical analysis and kinetic measurements. It was found that the main cause of deactivation under industrial operating conditions is f ouling due to carbonaceous and ZnO deposits. Various contaminant remov al procedures (calcination, wet screening and acetic acid leaching) we re tested and the influence of these procedures on contaminant removal and the catalyst activity were investigated. Regeneration of the spen t industrial catalyst using inexpensive processes was shown to be feas ible.