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New approach to enhance the NOx storage performance at high temperature using basic MgAl2O4 spinel support

Paper ID Volume ID Publish Year Pages File Format Full-Text
48638 46516 2007 6 PDF Available
Title
New approach to enhance the NOx storage performance at high temperature using basic MgAl2O4 spinel support
Abstract

With the purpose of improving the NOx storage performance of NOx storage and reduction (NSR) catalysts above 673 K, a new approach using a support with a higher basicity than γ-Al2O3 was proposed and exemplified by using the MgAl2O4 spinel as the support for an NSR catalyst containing the potassium NOx storage material. The NOx storage amounts on the fresh and thermally-aged K/Pt/MgAl2O4 catalysts at 873 K were apparently higher than those on the K/Pt/Al2O3 catalysts. The higher potassium basicity resulting from the interaction between the basic MgAl2O4 support and the potassium NOx storage material enhanced the stability of the stored NOx over the fresh and thermally-aged K/Pt/MgAl2O4 catalysts, which leads to their competitive NOx storage amounts versus those of the K/Pt/Al2O3 catalysts. These results indicated a breakthrough that improved the performance of the NSR catalysts at high temperature.

Keywords
NOx storage and reduction catalyst; MgAl2O4 spinel; Potassium; Thermal-aging; Basicity
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New approach to enhance the NOx storage performance at high temperature using basic MgAl2O4 spinel support
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 77, Issues 1–2, 30 November 2007, Pages 73–78
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Full-text PDF Download
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