Abstract
Ferrierite zeolites were synthesized in fluoride medium with SiO2/Al2O3 molar ratios 18, 22 and 37, using n-butylamine and pyridine as structure directing agents. The use of fluoride medium as mineralizing agent resulted in the formation of large crystals with morphology quite different from those obtained in hydroxide medium. These materials were characterized and evaluated in the gas-phase catalytic oxidative dehydration of glycerol at 300 °C, using air as carrier gas. Despite a low density of acid sites, the catalysts synthesized in fluoride medium led to high glycerol conversions and acrolein selectivities. Furthermore, coke formation was lower than that observed over the ferrierite synthesized in hydroxide medium.
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