SYNTHESIS AND THEORETICAL STUDY OF HPW CATALYSTS SUPPORTED ON NIOBIA CALCINATED AT 500 AND 600 degrees C

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F19%3A50016024" target="_blank" >RIV/62690094:18470/19:50016024 - isvavai.cz</a>

Result on the web

<a href="http://static.sites.sbq.org.br/quimicanova.sbq.org.br/pdf/AR20190133.pdf" target="_blank" >http://static.sites.sbq.org.br/quimicanova.sbq.org.br/pdf/AR20190133.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21577/0100-4042.20170386" target="_blank" >10.21577/0100-4042.20170386</a>

Result language

angličtina

Original language name

SYNTHESIS AND THEORETICAL STUDY OF HPW CATALYSTS SUPPORTED ON NIOBIA CALCINATED AT 500 AND 600 degrees C

Original language description

Keggin heteropolyacids (HPW) supported on niobia have been considered for both homogeneous and heterogeneous catalysis due to its special features, like the strong Bronsted acidity, low volatility, high activity and high selectivity for various reactions in comparison with mineral acids. Literature reports many different preparation methods for these catalysts through the addition of HPW solutions, in either water or acid, over niobia under stirring. However not much is known about the way how HPW interacts with the support, neither how the temperature influences this interaction. In order to contribute to expand the knowledge on this field we report here a new way of preparing HPW supported catalysts over niobia calcined at 500 and 600 degrees C, followed by a theoretical study meant to check the influence of the temperature increase on the adsorption behavior of the catalysts over the support. Our proposed method showed to be an efficient alternative for impregnation of HPW over niobia, while the theoretical results suggest that pseudo-hexagonal and orthorhombic are the most likely crystalline forms for these catalysts.

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

30108 - Toxicology

Project

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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

Quimica nova

ISSN

0100-4042

e-ISSN

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Volume of the periodical

42

Issue of the periodical within the volume

7

Country of publishing house

BR - BRAZIL

Number of pages

7

Pages from-to

745-751

UT code for WoS article

000483079600005

EID of the result in the Scopus database

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