Sébastien Laforge

Highly Efficient Dehydration of Glycerol to Acrolein Over Isomorphously Substituted Fe-MFI Zeolites

Gas phase dehydration of glycerol formerly in aqueous solution to acrolein was studied over iron MFI zeolites prepared by post-synthesis isomorphous substitution with different iron contents, Si/Al and substitution ratios. High Si/Al (60) ratios led to high conversion in presence of air and the insertion of iron in the zeolite framework greatly improved the catalytic performances by altering the amount and the nature of the coke components reducing dramatically the deactivation. Over the most efficient sample, acrolein yield reached a stabilized value of 68% with an excellent selectivity (80%), which ranked this catalyst among the best for the selective conversion of crude glycerol.Graphical Abstract

Effect of various external silicon sources on the properties of aluminosilicate mesoporous solids prepared from ZSM-5

Abstract The beneficial effect of external silicon sources on the structure, the stability or the catalytic activity of ZSM-5/MCM-41 composites is generalized through the comparison of different commercially available precursors.