Co-Mn-Al mixed oxides as catalysts for ammonia oxidation to N2O

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F16%3A43902835" target="_blank" >RIV/60461373:22310/16:43902835 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985858:_____/16:00457896 RIV/61989100:27710/16:86099142

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11164-015-2174-3" target="_blank" >http://dx.doi.org/10.1007/s11164-015-2174-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11164-015-2174-3" target="_blank" >10.1007/s11164-015-2174-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Co-Mn-Al mixed oxides as catalysts for ammonia oxidation to N2O

Popis výsledku v původním jazyce

Mixed oxide catalysts containing Co, Mn, and Al in a molar ratio of 4:1:1 were prepared by heating precursors obtained by a mechanochemical method (when appropriate nitrates were milled with ammonium hydrogen carbonate) or by coprecipitation. The precursors and related mixed oxides obtained at 500 oC were characterized by XRD, TG/DTA, UV-Vis, IR spectroscopy, TPR and NH3-TPD, and were tested for activity and selectivity in ammonia oxidation to N2O. The precursors prepared by mechanochemical reaction showed very similar phase composition to that of the coprecipitated product. All examined mixed oxide catalysts were active in the low temperature range (100 % conversion of NH3 was achieved at 250 oC), but the selectivity was sensitive to catalyst composition and the method used for preparation of the precursors. Non-modified Co-Mn-Al mixed oxide catalyst obtained from the coprecipitated precursor exhibited higher selectivity towards N2O formation than the calcined product prepared by the mechanochemical method. Modification of the latter mixed oxide catalysts with cesium promoter (1 wt%) significantly increased their selectivity to nitrous oxide. The yield of N2O at 250 oC was close to 100 %. ? 2015 Springer Science+Business Media Dordrecht.

Název v anglickém jazyce

Co-Mn-Al mixed oxides as catalysts for ammonia oxidation to N2O

Popis výsledku anglicky

Mixed oxide catalysts containing Co, Mn, and Al in a molar ratio of 4:1:1 were prepared by heating precursors obtained by a mechanochemical method (when appropriate nitrates were milled with ammonium hydrogen carbonate) or by coprecipitation. The precursors and related mixed oxides obtained at 500 oC were characterized by XRD, TG/DTA, UV-Vis, IR spectroscopy, TPR and NH3-TPD, and were tested for activity and selectivity in ammonia oxidation to N2O. The precursors prepared by mechanochemical reaction showed very similar phase composition to that of the coprecipitated product. All examined mixed oxide catalysts were active in the low temperature range (100 % conversion of NH3 was achieved at 250 oC), but the selectivity was sensitive to catalyst composition and the method used for preparation of the precursors. Non-modified Co-Mn-Al mixed oxide catalyst obtained from the coprecipitated precursor exhibited higher selectivity towards N2O formation than the calcined product prepared by the mechanochemical method. Modification of the latter mixed oxide catalysts with cesium promoter (1 wt%) significantly increased their selectivity to nitrous oxide. The yield of N2O at 250 oC was close to 100 %. ? 2015 Springer Science+Business Media Dordrecht.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

—

Projekt

<a href="/cs/project/GA14-13750S" target="_blank" >GA14-13750S: Strukturované katalyzátory s aktivní oxidovou vrstvou pro odstraňování plynných polutantů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Research on Chemical Intermediates

ISSN

0922-6168

e-ISSN

—

Svazek periodika

42

Číslo periodika v rámci svazku

2016

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

22

Strana od-do

2669-2690

Kód UT WoS článku

000372031300072

EID výsledku v databázi Scopus

2-s2.0-84959926581