Skip to main content
Vai all'homepage della Commissione europea (si apre in una nuova finestra)
italiano italiano
CORDIS - Risultati della ricerca dell’UE
CORDIS
Contenuto archiviato il 2024-04-16

Physical chemistry of zeolite synthesis

Obiettivo


State of the art simulation and quantum mechanical techniques were used to model:
the structural properties of zeolite crystals;
the sorption and diffusion of molecules within the microporous structures;
the mechanisms of key reactions.

Methodologies involved in simulating the structures of microporous solids have been refined and applied to a variety of complex systems. Work concentrated on:
modelling of Chabazite (the framework structure of this system has been successfully described by current interatomic potentials with minimization techniques but more difficulty was encountered in modelling the distribution of extraframework cations);
complex aluminophosphates systems (simulations have been used to assist the determination of previously unknown crystal structures);
complex heteroatom containing zeolites including catalytic titanium silicalite for which detailed predictions have been made regarding the location of the titanium in framework sites.

Molecular dynamic techniques were applied to the study of hydrocarbon diffusion in zeolites. Intracrystalline diffusion of linear hydrocarbon molecules in the zeolite silicalite and in the zeolite Chabazite were studied. Through modelling the trend of the diffusion with increasing loading was clearly established, and activation energies in good agreement with experimental values were obtained. Also, it was possible to extract a number of conclusions on the role played by the framework dynamics in the diffusion process.

An investigation of the computational and methodological aspects of calculating proton affinities and aluminium substitution energies has been performed for 1 site in silicalite. A cluster embedded in a point charge array yielded similar energetics to conventional hydrogen terminated models, provided the hydrogen positions are chosen correctly, while basis set quality was found to be more critical.
Adsorption of ammonia, water, methanol, dimethyl ether and the allyl cation at a Broensted acid site have been simulation. The nature of the binding geometries can be rationalized in terms of the conformation of the neighbouring T sites around the aluminium ion.
A project is proposed that aims to study the factors controlling the stability of zeolite phases formed during hydrothermal synthesis, having the unique feature that it combines three different approaches: -computational chemistry
-in-situ spectroscopy
-zeolite synthesis and crystallographic characterization
Research focusses on the packing of occluded ions (organic-inorganic) and water in hydrophobic (SiO2) as well as hydrophylic systems (A1PO4)
Especially the physical chemistry of wide porous zeolitic structure will be studied.

Campo scientifico (EuroSciVoc)

CORDIS classifica i progetti con EuroSciVoc, una tassonomia multilingue dei campi scientifici, attraverso un processo semi-automatico basato su tecniche NLP. Cfr.: Il Vocabolario Scientifico Europeo.

È necessario effettuare l’accesso o registrarsi per utilizzare questa funzione

Programma(i)

Programmi di finanziamento pluriennali che definiscono le priorità dell’UE in materia di ricerca e innovazione.

Argomento(i)

Gli inviti a presentare proposte sono suddivisi per argomenti. Un argomento definisce un’area o un tema specifico per il quale i candidati possono presentare proposte. La descrizione di un argomento comprende il suo ambito specifico e l’impatto previsto del progetto finanziato.

Dati non disponibili

Invito a presentare proposte

Procedura per invitare i candidati a presentare proposte di progetti, con l’obiettivo di ricevere finanziamenti dall’UE.

Dati non disponibili

Meccanismo di finanziamento

Meccanismo di finanziamento (o «Tipo di azione») all’interno di un programma con caratteristiche comuni. Specifica: l’ambito di ciò che viene finanziato; il tasso di rimborso; i criteri di valutazione specifici per qualificarsi per il finanziamento; l’uso di forme semplificate di costi come gli importi forfettari.

CSC - Cost-sharing contracts

Coordinatore

EINDHOVEN UNIVERSITY OF TECHNOLOGY
Contributo UE
Nessun dato
Indirizzo
Den Dolech 2
5600 MB EINDHOVEN
Paesi Bassi

Mostra sulla mappa

Costo totale

I costi totali sostenuti dall’organizzazione per partecipare al progetto, compresi i costi diretti e indiretti. Questo importo è un sottoinsieme del bilancio complessivo del progetto.

Nessun dato

Partecipanti (3)

Il mio fascicolo 0 0