Ammonia reactions with the stored oxygen in a commercial lean NOx trap catalyst

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F15%3A43900082" target="_blank" >RIV/60461373:22340/15:43900082 - isvavai.cz</a>

Alternative codes found

RIV/26722445:_____/15:#0001044

Result on the web

<a href="http://www.sciencedirect.com/science/article/pii/S1385894714013114" target="_blank" >http://www.sciencedirect.com/science/article/pii/S1385894714013114</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2014.09.115" target="_blank" >10.1016/j.cej.2014.09.115</a>

Result language

angličtina

Original language name

Ammonia reactions with the stored oxygen in a commercial lean NOx trap catalyst

Original language description

Ammonia is an important intermediate of the NOx reduction in a NOx storage and reduction catalyst (aka lean NOx trap). NH3 formed under rich conditions in the reduced front part of the catalyst is transported by convection downstream to the unregenerated(still oxidized) zone of the catalyst, where it further reacts with the stored oxygen and NOx. In this paper, the kinetics and selectivity of NH3 reactions with the stored oxygen are studied in detail with a commercial Ba-based NOx storage catalyst containing platinum group metals (PGM), Ba and Ce oxides. Furthermore, steady-state NH3 decomposition, NH3 oxidation by O2 and NO, and N2O decomposition are examined in light-off experiments. Periodic lean/rich cycling is measured first with O2 and NH3, andthen with NOx + O2 and NH3 to discriminate between the NH3 reactions with the stored oxygen and the stored NOx. The reaction of NH3 with the stored O2 is highly selective towards N2, however a certain amount of NOx and N2O is also formed.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

<a href="/en/project/LH12086" target="_blank" >LH12086: Analysis, Modeling and Control of Spatiotemporal Concentration Patterns in Nitrogen Oxide Reduction (deNOx) Catalysts for Automotive Exhaust Gas Aftertreatment</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

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Volume of the periodical

278

Issue of the periodical within the volume

neuveden

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

199-206

UT code for WoS article

000357907800026

EID of the result in the Scopus database

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