Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (4): 743-749.doi: 10.3866/PKU.WHXB201503025

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Preparation and Catalytic Performances of a Three-Dimensionally Ordered Macroporous MgFe0.1Al1.9O4 Catalyst for Ethylbenzene Oxydehydrogenation with CO2

LI Zhe-Qi1, WANG Te-Hua2, LI Xiu-Yuan3, ZHANG Ya-Qin2, JI Min2   

  1. 1 College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China;
    2 College of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China;
    3 API Production Division, Northeast Pharmaceutical Group Co., LTD., Shenyang 110000, P. R. China
  • Received:2014-12-11 Revised:2015-02-11 Published:2015-04-03
  • Contact: JI Min
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21356001) and Fundamental Research Funds for the Central Universities of Dalian University of Technology, China (DUT12ZD219).


Polymethyl methacrylate (PMMA) microspheres were synthesized using an emulsifier-free emulsion polymerization method. A three-dimensionally ordered macroporous (3DOM) MgFe0.1Al1.9O4 spinel-type oxide catalyst was prepared using the synthesized colloidal crystal templates and evaluated for oxidative dehydrogenation of ethylbenzene with CO2. Several techniques, such as powder X-ray diffraction, scanning electron microscopy, temperature-programed reduction, and 57Fe-Mössbauer spectra, were used to characterize the physicochemical properties of the catalyst. The results indicate that 3DOM MgFe0.1Al1.9O4 has a hexagonal ordered arrangement, with a pore diameter of 230 nm and a shell thickness of 60 nm, and that most of its Fe species are incorporated into the spinel lattice. Compared with a nano MgFe0.1Al1.9O4, the 3DOM MgFe0.1Al1.9O4 catalyst exhibited a much higher catalytic stability and less carbon deposition. A possible explanation for the enhanced catalytic stability of 3DOM MgFe0.1Al1.9O4 catalyst is discussed. The three-dimensionally ordered macroporous structure has a large effect on the diffusion of coke precursors and the stability of the catalyst.

Key words: Three-dimensionally ordered macroporous material, Mg-Fe-Al spinel, Carbon dioxide, Dehydrogenation of ethylbenzene, Stability


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