Must the Best Laboratory Prepared Catalyst Also Be the Best in an Operational Application?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27730%2F19%3A10242033" target="_blank" >RIV/61989100:27730/19:10242033 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27710/19:10242033

Result on the web

<a href="https://www.mdpi.com/2073-4344/9/2/160" target="_blank" >https://www.mdpi.com/2073-4344/9/2/160</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/catal9020160" target="_blank" >10.3390/catal9020160</a>

Result language

angličtina

Original language name

Must the Best Laboratory Prepared Catalyst Also Be the Best in an Operational Application?

Original language description

Three cobalt mixed oxide deN2O catalysts, with optimal content of alkali metals (K, Cs), were prepared on a large scale, shaped into tablets, and tested in a pilot plant reactor connected to the bypassed tail gas from the nitric production plant, downstream from the selective catalytic reduction of NOx by ammonia (SCR NOx/NH3) catalyst. High efficiency in N2O removal (N2O conversion of 75-90% at 450 oC, VHSV = 11,000 m3 mbed MINUS SIGN 3 h MINUS SIGN 1 ) was achieved. However, a different activity order of the commercially prepared catalyst tablets compared to the laboratory prepared catalyst grains was observed. Catalytic experiments in the kinetic regime using laboratory and commercial prepared catalysts and characterization methods (XRD, TPR-H2, physisorption, and chemical analysis) were utilized to explain this phenomenon. Experimentally determined internal effectiveness factors and their general dependency on kinetic constants were evaluated to discuss the relationship between the catalyst activity in the kinetic regime and the internal diffusion limitation in catalyst tablets as well as their morphology. The theoretical N2O conversion as a function of the intrinsic kinetic constants and diffusion rate, expressed as effective diffusion coefficients, was evaluated to estimate the final catalyst performance on a large scale and to answer the question of the above article title.

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

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

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

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Volume of the periodical

9

Issue of the periodical within the volume

2

Country of publishing house

CH - SWITZERLAND

Number of pages

18

Pages from-to

160

UT code for WoS article

000460702200054

EID of the result in the Scopus database

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