Mathematical modeling of ethylene oxidative acetylation process
Annotatsiya
In the article, the kinetic laws, kinetics, and mechanism of the oxidative acetylation reaction of ethylene in the vapor phase were studied in detail in the 0.4%Rd+4%Cu+7%CH 3 COOK/YuKTs catalyst. As a result of the research, the following optimal conditions for the reaction were selected: in the middle zone of the reactor at a temperature of 165°C, a volume velocity of 2000 h -1 , a pressure of 4 atm, a ratio of ethylene to acetic acid of 4:1 and an oxygen content of 7% by volume. Under these optimal conditions, the activation energies of the reactions of vinyl acetate formation and ethylene oxidation are respectively equal to: E a(VA) = 8.17 kcal/(mol∙K) and E a(SO2) = 19.61 kcal/(mol∙ K). It was found that the rate of oxidation of ethylene is higher than the rate of formation of vinyl acetate when the temperature exceeds 220°C. The reaction mechanism of vinylacetate formation from ethylene and acetic acid in the presence of a palladium catalyst was proposed.