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Modeling of NOx adsorption–desorption–reduction cycles on a ruthenium loaded Na–Y zeolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
47273 46466 2010 8 PDF Available
Title
Modeling of NOx adsorption–desorption–reduction cycles on a ruthenium loaded Na–Y zeolite
Abstract

Adsorption of NO from a gas stream containing oxygen and water and desorption and reduction using a rich gas mixture were investigated in the temperature range 230–315 °C on Na–Y zeolite loaded with 3 wt.% ruthenium. The NOx storage capacity was found little dependent on temperature and water content of the gas. The adsorption–desorption–reduction process was modeled using a one-dimensional fixed-bed model and assuming co-adsorption of NO and NO2 molecules on Na–Y zeolite, ruthenium catalyzed NO into NO2 oxidation by molecular oxygen during adsorption and ruthenium catalyzed NOx reduction by hydrogen during desorption. Kinetic constants were estimated through data fitting. An acceptable agreement between experimental and calculated values was obtained. NOx adsorption and desorption kinetics on Na–Y zeolite with and without ruthenium were substantially different revealing that ruthenium besides catalyzing NOx oxidation and reduction had a drastic influence on the NOx adsorption sites of Na–Y zeolite.

Keywords
Ru/Na–Y; NOx storage and reduction; N2O3; Kinetic modeling
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Modeling of NOx adsorption–desorption–reduction cycles on a ruthenium loaded Na–Y zeolite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 97, Issues 1–2, 9 June 2010, Pages 13–20
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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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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