Etude expérimentale de l'ammoxydation catalytique du propène dans un réacteur différentiel

Abstract

The kinetics of ammoxidation of propene has been studied over an industrial Sn/Sb oxides catalyst in a differential reactor at 490 °C. Factorial design of experiments leads to reliable rate equations over the range of partial pressures encountered in a fluidized bed reactor. The rate of disappearance of propene may be represented by the equation r 1 = 1.497 × 10 −7 P C 3H 6 0.48 P O 2 0.48 P NH 3 0.19 and the rate of formation of acrylonitrile by r 4 = 1.287 × 10 −7 P C 3H 6 0.43 P O 2 0.52 P NH 3 0.47 A best fit is obtained by the addition of some empirical pressure interaction terms. Catalytic activity is about the same as for other Sn/Sb oxides catalysts and maximum selectivity at 490 °C is at least 82%.