Citation: LI Zhe-Qi, WANG Te-Hua, LI Xiu-Yuan, ZHANG Ya-Qin, JI Min. Preparation and Catalytic Performances of a Three-Dimensionally Ordered Macroporous MgFe_0.1Al_1.9O₄ Catalyst for Ethylbenzene Oxydehydrogenation with CO₂[J]. Acta Physico-Chimica Sinica, ;2015, 31(4): 743-749. doi: 10.3866/PKU.WHXB201503025 shu

Preparation and Catalytic Performances of a Three-Dimensionally Ordered Macroporous MgFe_0.1Al_1.9O₄ Catalyst for Ethylbenzene Oxydehydrogenation with CO₂

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 Date: 11 December 2014
Available Online: 2 March 2015
Fund Project: 国家自然科学基金(21356001) (21356001)大连理工大学基本科研业务费重大项目培育科研专题(DUT12ZD219)资助项目 (DUT12ZD219)

Polymethyl methacrylate (PMMA) microspheres were synthesized using an emulsifier-free emulsion polymerization method. A three-dimensionally ordered macroporous (3DOM) MgFe_0.1Al_1.9O₄ 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 MgFe_0.1Al_1.9O₄ has a hexa nal 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 MgFe_0.1Al_1.9O₄, the 3DOM MgFe_0.1Al_1.9O₄ catalyst exhibited a much higher catalytic stability and less carbon deposition. A possible explanation for the enhanced catalytic stability of 3DOM MgFe_0.1Al_1.9O₄ 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.
- Three-dimensionally ordered macroporous material,
- Mg-Fe-Al spinel,
- Carbon dioxide,
- Dehydrogenation of ethylbenzene,
- Stability
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沈阳化工大学材料科学与工程学院沈阳 110142

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

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通讯作者: 陈斌, bchen63@163.com

Preparation and Catalytic Performances of a Three-Dimensionally Ordered Macroporous MgFe_0.1Al_1.9O₄ Catalyst for Ethylbenzene Oxydehydrogenation with CO₂