Analytical Methods for the Characterization of Pt-Rh Catalyst

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43914904" target="_blank" >RIV/60461373:22310/17:43914904 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analytical Methods for the Characterization of Pt-Rh Catalyst

Popis výsledku v původním jazyce

The Pt-Rh catalyst is in the form of standard catalyst gauze which is used for a very long time in the manufacture of nitric acid and other chemical technologies. It is characterized by a high mechanical strength at high operating temperatures, high resistance to catalyst poisons and a considerable efficiency. The content of rhodium in the catalyst system Pt-Rh ranges from 5 to 10% depending on the use of catalyst and the price of rhodium. At certain conditions, Pt-Rh catalysts used can reduce the catalytic activity and thus reduce the product yield significantly. The reasons of these unexpectedly low ields are often very complex. The contamination of Pt-Rh catalyst can be mainly caused by: 1) the purity of process gases, 2) the construction materials of reactor, and 3) the purity of catalyst gauzes. A special attention has to be paid to the presence of contaminants during the start-up period. The contamination during the start-up period causes an incompletely developed crystal structure. The contamination in this period greatly reduces the yield of the process in the campaign. The present study deals with the determination of textural and surface changes in the catalytic gauze resulting from its use.

Název v anglickém jazyce

Analytical Methods for the Characterization of Pt-Rh Catalyst

Popis výsledku anglicky

The Pt-Rh catalyst is in the form of standard catalyst gauze which is used for a very long time in the manufacture of nitric acid and other chemical technologies. It is characterized by a high mechanical strength at high operating temperatures, high resistance to catalyst poisons and a considerable efficiency. The content of rhodium in the catalyst system Pt-Rh ranges from 5 to 10% depending on the use of catalyst and the price of rhodium. At certain conditions, Pt-Rh catalysts used can reduce the catalytic activity and thus reduce the product yield significantly. The reasons of these unexpectedly low ields are often very complex. The contamination of Pt-Rh catalyst can be mainly caused by: 1) the purity of process gases, 2) the construction materials of reactor, and 3) the purity of catalyst gauzes. A special attention has to be paid to the presence of contaminants during the start-up period. The contamination during the start-up period causes an incompletely developed crystal structure. The contamination in this period greatly reduces the yield of the process in the campaign. The present study deals with the determination of textural and surface changes in the catalytic gauze resulting from its use.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/LO1613" target="_blank" >LO1613: Výzkum nových materiálů pro chemický průmysl</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

PROCEEDINGS 44th International Conference of the Slovak Society of Chemical Engineering

ISBN

978-80-89597-58-1

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

9

Strana od-do

752-759

Název nakladatele

Slovak Society of Chemical Engineering

Místo vydání

Bratislava

Místo konání akce

Demänovská dolina

Datum konání akce

22. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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