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The effect of ageing step elimination on the memory effect presented by Mg0.75Al0.25 hydrotalcites (HT) and their catalytic activity for cyanoethylation reaction

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: O.D. Pavel, R. Zãvoianu, R. Bîrjega, E. Angelescu

Editorial: Catalysis Communications, 12, p.845-850, 2011.


The absence of ageing step in the coprecipitation method leads to modification of textural and structural
properties of Mg0.75Al0.25 hydrotalcites which are reflected in the “memory effect” and in the catalytic activity
of these samples for cyanoethylation reaction between ethanol and acrylonitrile where the betaethoxypropionitrile
is the prevailing reaction product. The solids were characterised by XRD, DRIFT, TEM and base sites determination by adsorption of molecules with different pKa aiming to establish a correlation
between structural characteristics and the catalytic activity.

Cuvinte cheie: Hydrotalcites, Memory effect, basicity, Cyanoethylation reaction