Citation: SUN Ya-nan, WEI Fei. Studies on microwave-assisted synthesis of ZnFe-LDHs and their performance in oxidative dehydrogenation of isopentene[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(8): 970-979. shu

Studies on microwave-assisted synthesis of ZnFe-LDHs and their performance in oxidative dehydrogenation of isopentene

SUN Ya-nan ,
WEI Fei ^,

Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Corresponding author: WEI Fei, wf-dce@tsinghua.edu.cn
Received Date: 14 March 2017
Revised Date: 28 April 2017

Fund Project: China Postdoctoral Science Foundation 2016M601043The project was supported by China Postdoctoral Science Foundation(2016M601043)

Figures(14)

A series of ZnFe-LDHs were prepared via microwave-assisted co-precipitation method based on the structural properties of layered double hydroxides (LDHs) and the advantages of microwave-assisted synthesis and used for oxidative dehydrogenation of isopentene. The H₂O/C₅H₁₀ molar ratio was lowered due to the easily hydroxylic surface. The results indicate that the microwave method can significantly shorten the synthesis time. ZnFe-LDHs with high crystallinity and purity were obtained at the microwave power of 600 W, microwave temperature of 95 ℃ and microwave time of 1 h. Compared with conventional method, the ZnFe-LDHs catalysts prepared with microwave method generated precursors exhibited higher activity and selectivity in oxidative dehydrogenation of isopentene. 52% yield of isoprene and 83% selectivity were achieved when the H₂O/C₅H₁₀ molar ratio was 5.7, which was greatly lowered.
- microwave,
- ZnFe-LDHs,
- hydroxylation,
- steam-to-olefin molar ratio
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