Propane selective oxidation to acrylic acid has been carried out by sequential oxidative dehydrogenation of propane and selective oxidation to acrylic acid of propylene steps in one reactor loaded with a two-catalyst bed. The propane ODH over a Ni-based oxide catalyst was active at relative low temperatures, which is near to those of the propylene SOA over a mixed metal oxides catalyst. In the combined catalytic reaction system, the propane conversion as well as the AA selectivity was

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... e with the catalyst bed configurations. A novel approach to improving the acrylic acid selectivity has been presented. Based on the use of an O 2 -distributor, the reaction system of propane to acrylic acid could provide a ∼80% of acrylic acid selectivity and a ∼19% of propane conversion at 340°C and C 3 H 8 /O 2 /N 2 (mol %) = 11.0/20.9/68.1 of feed gases.