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Intercalation as a new approach for obtaining highly efficient pi-adsorbents and supported catalysts

Ziel

The objectives of the project are:
- to create a new method for the preparation of highly efficient pi-adsorbents based on intercalation of graphite or anthracite using dinitrogen tetroxide followed by heat treatment in inert and/or oxidizing atmosphere;
- to study in detail the microtexture and surface chemistry of resulting activated graphitic sorbents and to determine the factors controlling these parameters in order optimize the synthesis of highly selective adsorbents for precious metals;
- to evaluate in detail the mechanism of adsorption of platinum group metals (palladium, ruthenium, rhodium, iridium) by carbon materials.
to determine the correlation between the chemical state of a metal adsorbed on carbon surface, the porous structure and the catalytic activity in liquid-phase hydrogenation and hydroformylation.
Research activities
1. Development of methods for synthesis of highly efficient graphitic sorbents from anthracite and graphite using their intercalation with dinitrogen tetroxide;
2. Synthesis of fibre carbons and their activated and oxidized forms by conventional methods from coal-tar pitch;
3. Surface characteristics and adsorption properties of the obtained carbon materials;
4. Extended testing of adsorption selectivity of obtained sorbents towards platinum metals from aqueous and organic solutions;
5. Investigation of catalytic activity of graphitic carbon-supported platinum metals in hydrogenation of olefins or CO and hydroformylation of olefins, and in the decomposition of organic compounds such as peroxy acids, hydroperoxides and phenols.
Study of the chemical state of platinum group metals on carbon surface and metal/carbon interaction.
Optimisation of synthetic strategies towards production of highly efficient graphitic carbons for desired application from intercalated graphitic materials
Research results
A novel approach for obtaining highly efficient sorbents from graphitic materials via intercalation will be developed;
A method of anthracite and graphite intercalation using N2O4 will be suggested;
A considerable body of data on macrostructure, surface structure and sorption properties of new type of sorbents will be accumulated and systematized;
A concept and methodology for the use of sorbents from intercalated graphitic carbons as platinum metal sorbents or as catalyst carriers in the liquid phase hydrogenation of olefins and hydroformylation of CO will be elaborated.

Mechanism of adsorption of platinum metals by graphitic sorbents will be evaluated.
There is a great potential for implementation of fundamental results generated by this project in a variety of industrial and environmental applications, such as extraction of precious metals and catalytic hydrogenation or hydroformylation in liquid phase, and utilisation of dinitrogen tetroxide. The latter is particularly important for Ukraine, as it will help to reduce problems related to the conversion of the former military-industrial complex. All countries involved in this project (except Britain) have vast deposits of anthracite and graphite, which is essential for industrial production of highly efficient adsorbents. Assessment of this application will be offered through INTAS to other European countries.


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Koordinator

Centre National de la Recherche Scientifique
EU-Beitrag
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Adresse
1b, rue de la Ferollerie
45071 Orléans Cedex 2
Frankreich

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Beteiligte (5)