Acrylonitrile synthesis through a tubular reactor by Catalytic ammoxidation of propane

فاقد چكيده فارسي

The modeling of catalytic ammoxidation of propane over V-Sb-Al catalyst in a conventional tubular reactor (CTR) is investigated. The mathematical model based on combining the kinetics of reaction and the hydrodynamics of bed, used to model the reactor. The kinetics of propane ammoxidation to acrylonitrile on a V-Sb-Al based mixed oxide catalyst are described by a Langmuir-Hinshelwood approach. This synthesis have six parallel reactions of formation (propylene, acrylonitrile, carbon oxides, acetonitrile, HCN, and hydrocarbons), three reactions of consecutive of transformation of the intermediate propylene to acrylonitrile, acetonitrile and HCN, five decomposition reactions of intermediate products to carbon oxides, and one reaction of decomposition of ammonia. The ammoxidation is highly exothermic process. The operating condition for temperature is in range of (680-810 K) and for pressure is in range of (0.5-2 bar). The analysis of the effect of operating condition show that the acrylonitrile yeild, increases by increasing in temperature of reaction and decreasing in propane feed molar flow rate.