Experimental and modeling study of the impact of interphase and intraphase diffusional limitations on the DeNOx efficiency of a V-based extruded catalyst for NH3―SCR of Diesel exhausts

The influence of inter- and intra-phase diffusional limitations on the DeNOx activity of an extruded V2O5-WO3/TiO2 SCR monolith catalyst was studied by both experimental and modeling tools over a wide temperature window and over the full range of NO2/NOx feed ratios. The comparison of the DeNOx acti...

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Bibliographic Details
Published in:Chemical engineering journal (1996) 2012-10, Vol.207-208, p.57-65
Main Authors: PIA RUGGERI, Maria, NOVA, Isabella, TRONCONI, Enrico
Format: Article
Language:English
Subjects:
Applied sciences
Catalysis
Catalysts
Catalytic reactions
Chemical engineering
Chemistry
Conversion
Diffusion
Exact sciences and technology
Extrusion
General and physical chemistry
Heat and mass transfer. Packings, plates
Mathematical models
Nitrogen dioxide
Reactors
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Titanium dioxide
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Summary:The influence of inter- and intra-phase diffusional limitations on the DeNOx activity of an extruded V2O5-WO3/TiO2 SCR monolith catalyst was studied by both experimental and modeling tools over a wide temperature window and over the full range of NO2/NOx feed ratios. The comparison of the DeNOx activity of monolith and powdered catalyst enabled a direct evaluation of the mass transfer resistances. These were found to affect NH3 and NOx conversions to an extent depending on temperature and on NO2 feed content, and were satisfactorily predicted by a 1D + 1D mathematical model of SCR monolith converters.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2012.06.145