Reaction mechanism of NO direct decomposition over K-promoted Co-Mn-Al mixed oxides - DRIFTS, TPD and transient state studies

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F21%3A10247361" target="_blank" >RIV/61989100:27710/21:10247361 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1876107021000948" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1876107021000948</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jtice.2021.02.028" target="_blank" >10.1016/j.jtice.2021.02.028</a>

Result language
angličtina
Original language name
Reaction mechanism of NO direct decomposition over K-promoted Co-Mn-Al mixed oxides - DRIFTS, TPD and transient state studies
Original language description
The reaction mechanism of direct NO decomposition over Co4MnAlOx mixed oxides prepared by co-precipitation method and promoted by 0-3.1 wt.% of potassium was studied. Temperature programmed desorption of NO and in-situ diffuse reflectance infrared Fourier transform spectroscopy confirmed the presence of several nitrogen species (adsorbed NO, NO-, NO2-, and NO3-) present on the catalyst surface and revealed that O2 desorption occurs at the high temperature region together with the NO desorption as the product of NO2- and/or NO3- decomposition. This region corresponds with the temperature of launching NO conversion curve, which together with the results from the transient state experiments proved that O2 desorption is the slowest step while the reaction steps including NOx- formation and those leading to N2 release are fast. The Langmuir-Hinshelwood mechanism was proposed as a plausible way of direct NO decomposition over K/Co4MnAlOx catalysts and NO2- and NO3- were determine as the main reaction intermediates. (C) 2021 Taiwan Institute of Chemical Engineers
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20402 - Chemical process engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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