화학공학소재연구정보센터
Catalysis Today, Vol.289, 38-46, 2017
Gas phase glycerol oxidative dehydration over bifunctional V/H-zeolite catalysts with different zeolite topologies
The oxidative dehydration of glycerol to acrylic acid can be performed in one single step using bifunctional catalysts containing both acid and redox sites. In this sense, zeolites containing transition metals are promising catalysts. Zeolites of different topologies: FAU, FER, MEL, MFI, MOR, MWW and OFF were synthesized and further impregnated with 5% vanadium. The catalysts were characterized and evaluated in the gas phase glycerol oxidative dehydration. All catalysts showed high conversions of glycerol (10078%). The acrolein selectivity decreases with the total density of acid sites in these zeolites. The selectivity to acrylic acid is related to the ability of each topology of stabilizing the redox pair V5+/V4+. The best performances were observed for zeolite catalysts with MWW, BEA and MFI topologies. (C) 2016 Elsevier B.V. All rights reserved.