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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2017, Vol. 18 Issue (3): 225-233    DOI: 10.1631/jzus.A1600295
Articles     
Dual bed catalyst system for oxidative dehydrogenation of mixed-butenes: a synergistic mechanism
Xiao-yi Li, Dang-guo Cheng, Feng-qiu Chen, Xiao-li Zhan
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China; College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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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.

Key wordsMixed-butenes      Dual bed catalyst      Oxidative dehydrogenation (ODH)      Synergistic effect     
Received: 06 April 2016      Published: 07 March 2017
CLC:  TQ221.2  
Cite this article:

Xiao-yi Li, Dang-guo Cheng, Feng-qiu Chen, Xiao-li Zhan. Dual bed catalyst system for oxidative dehydrogenation of mixed-butenes: a synergistic mechanism. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2017, 18(3): 225-233.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1600295     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2017/V18/I3/225

[1] PAN Zhi-da, SUN Jun-quan, YANG Shi-lin. POLYMERIZATION OF METHYL METHACRYLATE WITH IRON-YTTERBIUM DINUCLEAR METALLOCENE CATALYST[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2000, 1(1): 20-26.