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Abstract: oxidative dehydrogenation (ODH) of mono and mixed-butenes to 1,3-butadiene (BD) was conducted using individual and dual bed catalyst systems, consisting of ZnFe₂O₄, Co₉Fe₃Bi₁Mo₁₂O₅₁ or both. The dual bed catalyst system gave improved catalytic performance. A mechanism based on synergy between the catalysts is proposed to explain the improved overall butene conversion. The proportion of the reactants differed between the catalyst beds in the dual bed system, making better use of the catalytic activity of the second bed. The existence of all butene isomers inhibited isomerization, leading to a higher proportion of ODH reactions and thus improved the conversion of butene and the yield of BD. The packing sequences and the volume ratio of the catalysts in the bed were optimized. The results indicated that the sequence with ZnFe₂O₄ on top and a catalyst packing ratio of between 4:6 and 6:4 led to better activity.

This manuscript reports on an investigation of a dual catalysts bed system for the Oxidative Dehydrogenation of mixtures of butenes to 1,3 butadiene. The topic is of interest and the amount of work is substantial.

混合丁烯氧化脱氢双层床催化剂体系的协同作用机理

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