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Effect of the support on activity of silver catalysts for the selective reduction of NO by propene

Paper ID Volume ID Publish Year Pages File Format Full-Text
47149 46462 2010 14 PDF Available
Title
Effect of the support on activity of silver catalysts for the selective reduction of NO by propene
Abstract

Use of zirconia, ceria–zirconia and ceria supports for Ag-based lean deNOx catalysts lowers the temperature range of activity by about 150–200 K with respect to Al2O3-supported analogues. Ex situ characterisation of the catalysts indicates that this remarkable effect is associated with a role of the support rather than Ag dispersion. The crucial role of the support is further evidenced by suppression of CO formation over these catalysts and by significant support-related differences when SO2 is added to the feed. The presence of ceria in the formulation results in an initial resistance to the deactivating effect of SO2; while the use of both zirconia and ceria–zirconia facilitates reactivation after sulphur poisoning.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Activity range of supported Ag for C3H6-SCR can be tuned by the choice of support. ▶ ZrO2 improve SOx resistance and ease of regeneration of Ag catalysts. ▶ Inclusion of CeO2 in the ZrO2-based support favours SOx resistance.

Keywords
Ag catalysts; Ceria–zirconia; Zirconia; Alumina; SO2
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Effect of the support on activity of silver catalysts for the selective reduction of NO by propene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 100, Issues 1–2, 11 October 2010, Pages 102–115
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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