ChemInform Abstract: Roles of Spinel and Maghemite Phases in the Oxidative Dehydrogenation of Butene Over Iron Complex Oxides. Part 2. Epitaxy and Synergy Between γ‐Fe2O3 and Ferrite Spinels.

Abstract

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Effect of Excess Iron on Oxidative Dehydrogenation of 1-Butene over a Series of Zinc Ferrite Catalysts

“…Al [19] and Xu et. Al [20] who concluded, contradictory to our own findings, that the presence of an excess of Fe 2 O 3 in a ZnFe 2 O 4 catalyst improves catalytic activity. By thoroughly characterizing our catalysts' morphology and electronic properties the aim was to understand these differences.…”

“…To determine what effect the reaction process has on the catalysts, post-reaction characterization was performed. Unfortunately, studies looking at similar systems only include very limited post reaction catalyst characterization for comparison [18][19][20]. Post reaction XPS carried out on catalysts 2.0Fe and 2.5Fe show an increase in both the Fe: Zn ratio and the percentage of O2-present at the surface of both catalysts over the course of the reaction.…”

“…As 1, 3-butadiene is such a useful and valuable resource, a significant amount of research has been carried out looking at improving zinc ferrite catalyst activity for the ODH of 1-butene. The research has covered a wide variety of different synthesis methods and potential zinc ferrite promoters; including sulphur [6], aluminium [7], phosphoric acid [18], and α/γ-Fe 2 O 3 [19,20]. In a study examining a series of biphasic [19].…”

Stabilizing Oxidative Dehydrogenation Active Sites at High Temperature with Steam: ZnFe2O4-Catalyzed Oxidative Dehydrogenation of 1-Butene to 1,3-Butadiene

“…ODH of butenes is a highly attractive process to produce 1,3-butadiene which is one of the most important bulk chemicals in the production of acrylonitrile-butadiene-styrene, butadiene rubber, styrene-butadiene rubber and plastics. Various catalysts have been investigated for the ODH of butenes, including ferrite-type catalyst, [4][5][6][7][8][9] Bi-Mo-based catalyst, [10][11][12] vanadium-based catalyst, 13,14 Pd-based catalysts, 15 Pt-based catalysts, 16 and carbon nanotube catalysts. 17 The nature of the active site for these ODH catalysts and the influence of reaction conditions are central questions in the domain.…”