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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of the Taiwan Institute of Chemical Engineers

ISSN

1876-1070

e-ISSN

—

Svazek periodika

2021

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

TW - Čínská republika (Tchaj-wan)

Počet stran výsledku

10

Strana od-do

257-266

Kód UT WoS článku

000640771800008

EID výsledku v databázi Scopus

2-s2.0-85102128568