Ammoxidation of acrolein to acrylonitrile over bismuth molybdate catalysts

• Ammoxidation of acrolein to acrylonitrile via glycerol as sustainable source.
• Bismuth molybdate supported on KIT-6 catalysts with high texture properties.
• High acrylonitrile yields (conversion 84%, selectivity 98%, and yield 82%).

The present work deals with the potentially significant process converting acrolein of green origin to acrylonitrile using mesoporous bismuth molybdate catalysts. The ammoxidation catalysts were characterized by N2 physisorption, X-ray diffraction, and catalytic tests under various conditions at different temperatures, contact times, and reactant molar ratios. The results indicated a catalytic activity proportional to specific surface area, which depends on bismuth molybdate phases, and concentration of oxygen in the gas feed. The selectivity of the catalysts only depends on reaction temperature. ACN selectivity obtained at 350–400 °C was 100% and reduced to 97% at 450 °C.

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