Propene oxidation on substituted 2:1 bismuth molybdates and vanadates

Abstract

The oxidation of propene over mixed metal oxide catalysts based on cation substituted 2:1 bismuth molybdates (Bi 2Mo 1_ xMe xO 6_ y, Me = Ni (x = 0.0, 0.25)) and vanadates Bi 2V 1_ XMe xO 5.5_ y, Me = Mn(x = 0.25), and Mo(x = 0.0, 0.25 and 0.50) has been studied. At atmospheric pressure and temperatures of 350–550°C, the Mo:V containing catalysts are more selective for acrolein production than either Bi 2MoO 6, or Bi 2VO 5.5, but Ni and Mn substitutions produced less selective catalysts. Small quantities of propylene oxide were observed, but attributed to gas-phase reactions which are partially quenched by all the catalysts investigated.