Effect of diffusion limitation on the performance of multi-layer oxidation and lean NOx trap catalysts
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F16%3A43902399" target="_blank" >RIV/60461373:22340/16:43902399 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23640/16:43929030
Result on the web
<a href="http://dx.doi.org/10.1016/j.cattod.2016.03.013" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2016.03.013</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cattod.2016.03.013" target="_blank" >10.1016/j.cattod.2016.03.013</a>
Alternative languages
Result language
angličtina
Original language name
Effect of diffusion limitation on the performance of multi-layer oxidation and lean NOx trap catalysts
Original language description
Recent effort in emission control catalyst development aims for saving space and cost by combining different catalytic functions in a single multi-layered monolith reactor. However, the overall efficiency of the converter and particularly the bottom layer performance can be negatively affected by transport limitations. This work investigates transport limitation in double-layer systems consisting of oxidation (DOC) and lean NOx trap (LNT, NOx storage) catalysts. CO/HC oxidation and NOx storage/reduction experiments were carried out in a laboratory reactor. The LNT coating in the tested samples was overlaid with an additional layer that was either inert (?-Al2O3) or catalytically active (DOC). The inert layer served as a diffusion barrier with no catalytic activity to decouple the transport and reaction effects. The hindered transport affected both NOx storage (less efficient initial NOx uptake) and NOx reduction (changes in the selectivity, longer delay of NH3 breakthrough, shift of N2O formation from primary to secondary peak). The presence of DOC layer on the top of LNT improved the catalytic performance at lower temperatures by increasing the effective NOx storage capacity (due to NO oxidation activity) and improved regeneration efficiency (due to water gas shift, steam reforming and NH3 re-oxidation). ? 2016 Elsevier B.V.
Czech name
—
Czech description
—
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CI - Industrial chemistry and chemical engineering
OECD FORD branch
—
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Catalysis Today
ISSN
0920-5861
e-ISSN
—
Volume of the periodical
273
Issue of the periodical within the volume
273
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
112-120
UT code for WoS article
000377386900014
EID of the result in the Scopus database
—