Gas phase glycerol oxidative dehydration over bifunctional V/H-zeolite catalysts with different zeolite topologies

作者：Silva Thamyris Q; dos Santos Mauricio B; Santiago Alex A C; Santana Danilo O; Cruz Fernanda T; Andrade Heloysa M C; Mascarenhas Artur J S^*

来源：Catalysis Today, 2017, 289: 38-46.

DOI：10.1016/j.cattod.2016.08.011

• Glycerol oxidative dehydration
• Acrylic acid
• V/H-zeolite catalysts

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.

• 出版日期2017-7-1