Effect of Divalent Metal Component (MeII) on the Catalytic Performance of MeIIFe2O4 Catalysts in the Oxidative Dehydrogenation of n-Butene to 1,3-Butadiene

Abstract

A series of metal ferrite (Me II Fe 2 O 4 ) catalysts were prepared by a co-precipitation method with a variation of divalent metal component (Me II = Zn, Mg, Mn, Ni, Co, and Cu) for use in the oxidative dehydrogenation of n-butene to 1,3-butadiene. Successful formation of metal ferrite catalysts with a random spinel structure was confirmed by XRD, ICP-AES, and XPS analyses. The catalytic performance of metal ferrite catalysts in the oxidative dehydrogenation of n-butene strongly depended on the identity of divalent metal component. Acid properties of metal ferrite catalysts were measured by NH 3 -TPD experiments, with an aim of correlating the catalytic performance with the acid property of the catalysts. It was revealed that the yield for 1,3-butadiene increased with increasing surface acidity of the catalyst. Among the catalysts tested, ZnFe 2 O 4 catalyst with the largest surface acidity showed the best catalytic performance in the oxidative dehydrogenation of n-butene.

Oxidative Dehydrogenation of n-Butene to 1,3-Butadiene Over ZnMeIIIFeO4 Catalysts: Effect of Trivalent Metal (MeIII)

“…Figure 5 shows the correlation between yield for 1,3-butadiene and surface weak-acid density of ZnMe IIIFeO 4 catalysts. The correlation clearly shows that yield for 1,3-butadiene was closely related to the surface weak-acid density of ZnMe III FeO 4 catalysts, in good agreement with the previous works [12,[23][24][25][26]. Yield for 1,3-butadiene increased with increasing surface weak-acid density of the catalyst.…”

“…Therefore, it is expected that surface acid-base properties of ferrite-type catalyst play a very important role in the oxidative dehydrogenation of n-butene. It has been reported in our previous works [12,23,24] that the catalytic performance of zinc ferrite catalyst in the oxidative dehydrogenation of n-butene was closely related to the surface acid density of the catalyst.…”

“…In our previous work [24], it has been demonstrated that the catalytic performance of Me II Fe 2 O 4 catalysts in the oxidative dehydrogenation of n-butene strongly depended on the identity of divalent metal (Me II ), and zinc served as the most suitable divalent metal for metal ferrite (Me II Fe 2 O 4 ) catalysts. However, the effect of trivalent metal component on the catalytic performance of ferrite-type catalysts in the oxidative dehydrogenation of n-butene has not been clearly elucidated yet.…”

Oxidative Dehydrogenation of n-Butene to 1,3-Butadiene over Sulfated ZnFe2O4 Catalyst

“…This means that surface acid-base property of ZnFe 2 O 4 catalyst plays a very important role in the oxidative dehydrogenation of n-butene. It has been reported in our previous works [11,19,21,25,26] that the catalytic performance of ZnFe 2 O 4 catalyst in the oxidative dehydrogenation of n-butene was closely related to the surface acid density of the catalyst.…”

Factors Affect on the Reaction Performance of the Oxidative Dehydrogenation of n-Butene to 1,3-Butadiene Over Zn-Ferrite Catalysts

“…Recently, Song et al [9][10][11] have focused on the preparation of two types of catalysts such as ferrite catalysts and multicomponent bismuth molybdate catalysts [12][13][14][15][16][17][18][19][20][21][22][23][24] and found that catalytic performance could be improved by pH control [9,15,20], divalent metal substitution [11], or calcination condition [24].…”