Co-Mn-Al Mixed Oxides Promoted by K for Direct NO Decomposition: Effect of Preparation Parameters.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F19%3A00511878" target="_blank" >RIV/67985858:_____/19:00511878 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27710/19:10242314 RIV/61989100:27730/19:10242314

Result on the web

<a href="https://www.mdpi.com/2073-4344/9/7/593" target="_blank" >https://www.mdpi.com/2073-4344/9/7/593</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/catal9070593" target="_blank" >10.3390/catal9070593</a>

Result language

angličtina

Original language name

Co-Mn-Al Mixed Oxides Promoted by K for Direct NO Decomposition: Effect of Preparation Parameters.

Original language description

Fundamental research on direct NO decomposition is still needed for the design of a suffciently active, stable and selective catalyst. Co-based mixed oxides promoted by alkali metalsnare promising catalysts for direct NO decomposition, but which parameters play the key role in NO decomposition over mixed oxide catalysts? How do applied preparation conditions a ectnthe obtained catalyst’s properties? Co4MnAlOx mixed oxides promoted by potassium calcined at various conditions were tested for direct NO decomposition with the aim to determine theirnactivity, stability and selectivity. The catalysts were prepared by co-precipitation of the corresponding nitrates and subsequently promoted by KNO3. The catalysts were characterized by atomic absorption spectrometry (AAS)/inductive coupled plasma (ICP), X-ray photoelectron spectrometry (XPS), XRD, N2 physisorption, temperature programmed desorption ofCO2 (TPD-CO2), temperature programmed reduction by hydrogen (TPR-H2), species-resolved thermal alkali desorption (SR-TAD), work function measurement and STEM. The preparation procedure affects physico-chemical properties of the catalysts, especially those that are associated with the potassium promoter presence. The addition of K is essential for catalytic activity, as it substantially ffects the catalyst reducibility and basicity—key properties of a deNO catalyst. However, SR-TAD revealed that potassium migration, redistribution and volatilization are strongly dependent on the catalyst calcination temperature—higher calcination temperature leads to potassium stabilization. It also caused the formation of new phases and thus affected the main properties—SBET, crystallinity and residual potassium amount.

Czech name

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Czech description

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Type

J_imp - 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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Catalysts

ISSN

2073-4344

e-ISSN

—

Volume of the periodical

9

Issue of the periodical within the volume

7

Country of publishing house

CH - SWITZERLAND

Number of pages

26

Pages from-to

593

UT code for WoS article

000478652600009

EID of the result in the Scopus database

2-s2.0-85069483028