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Studies on the regeneration of sulfur-poisoned NOX storage and reduction catalysts, including a Ba composite oxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
40343 45851 2013 9 PDF Available
Title
Studies on the regeneration of sulfur-poisoned NOX storage and reduction catalysts, including a Ba composite oxide
Abstract

The analysis of sulfur deterioration and regeneration of a NOX storage and reduction (NSR) catalyst containing Ba as the storage material and TiO2 as the support was conducted. It was found that the inhibition of sulfur re-adsorption during the sulfur desorption procedure under a rich atmosphere is important for improving sulfur desorption from a sulfur poisoned NSR catalyst, and that the combination of a Ba compound and a TiO2 support is effective for the inhibition of sulfur poisoning under both lean and rich conditions. On the basis of these results, a highly dispersed Ba-Ti composite oxide catalyst was prepared using a Ba-Ti complex precursor in order to realize the nm-scale distribution of Ba and Ti. Furthermore, it was concluded that the principal factor contributing to the high performance of the Ba-Ti catalyst in terms of the sulfur desorption rate was its ability to inhibit repetitive adsorption during rich treatment for sulfur desorption.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (285 K)Download as PowerPoint slideHighlights► Inhibition of sulfur re-adsorption under a rich condition improves NSR catalyst. ► Combination of Ba and Ti is effective for the inhibition of rich sulfur poisoning. ► The Ba-Ti composite oxide is more effective for a prevention of sulfur deactivation.

Keywords
NSR catalyst; Desulfation; Barium sulfate; Titanium oxide; Citric acid
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Studies on the regeneration of sulfur-poisoned NOX storage and reduction catalysts, including a Ba composite oxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 455, 30 March 2013, Pages 16–24
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Full-text PDF Download
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