Mechanochemical Preparation of Alumina-Ceria

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F15%3A00446872" target="_blank" >RIV/67985858:_____/15:00446872 - isvavai.cz</a>

Result on the web

<a href="http://hdl.handle.net/11104/0248821" target="_blank" >http://hdl.handle.net/11104/0248821</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Mechanochemical Preparation of Alumina-Ceria

Original language description

Ceria containing catalysts play an essential role in heterogeneous catalytic processes. However, ceria shows poor thermal stability and low specific surface area and therefore, many studies have been done to improve its properties by combination with other oxides. Alumina-ceria is substantial component of the three ways catalysts, due to the ceria ability to function as the buffer of oxygen and to enhance the oxygen storage capacity of the catalysts. Ceria in these catalysts also functions as structural promoting component, increasing alumina stability towards thermal sintering. Promising method of oxides preparation, very interesting and simple but not sufficiently studied yet is a mechanochemical synthesis. Here we report on the synthesis of nano-sized alumina, ceria and ceria-alumina of various compositions by a wet solid phase mechanochemical reaction of hydrous aluminum, and/or cerium nitrate with ammonium bicarbonate after addition of a small amount of water. The aim of this contribution is to study processes being in progress during synthesis of the mixed oxides, interaction between components and their mutual effect on the properties of resulting products. The phase evolution during mechanical milling and the subsequent heat treatment of precursors were studied by X-ray diffraction, DTA/TG, H2-TPR, NH3-TPD, CO2-TPD, N2 adsorption at -195°C, IR, and XPS spectroscopy. Alumina and mixtures of alumina with different quantities of CeO2 (1- 18 wt. %) were synthesized by mechanochemical method from aluminum nitrate, cerium nitrate and ammonia bicarbonate.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

<a href="/en/project/GA14-13750S" target="_blank" >GA14-13750S: Structured catalysts with active oxide layer for abatement of gaseous pollutants</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Article name in the collection

Proceedings of the 3rd International Conference on Chemical Technology

ISBN

978-80-86238-82-1

ISSN

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e-ISSN

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Number of pages

7

Pages from-to

181-187

Publisher name

Czech Society of Industrial Chemistry

Place of publication

Prague

Event location

Mikulov

Event date

Apr 13, 2015

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

000383856800035