부산대학교 도서관

The oxidative dehydrogenation reaction of n-butene to butadiene over Bi-Mo, Bi oxide and Mo oxide catalysts in a flow system at atmospheric pressure has been investigated.High butadiene yield were obtained over Bi-Mo coprecipitation catalyst at 400∼500°C in excess of oxygen, but higher oxygen content lowered the butadiene selectivity with increase in CO and CO2 formation.The order of oxidative dehydrogenation over the investigated catalysts can be shown as follows, Bi-Mo(coprecipitation)>Bi2O3+MoO3(dry mixing)>MoO2.76>MoO3>Bi2O3_??_Silica chip.When oxidation reaction of hydrogen compared with oxidative dehydrogenation of n-butene at the same conditions, it was assumed that oxidative dehydrogenation over Bi-Mo and MoO3 catalysts was not dehydrogenation followed by oxidation of hydrogen.Oxidation reaction of n-butene over Bi2O3 catalyst may undergo in different mechanism from oxidative dehydrogenation over Bi-Mo catalyst.