期刊
CHEMICAL ENGINEERING JOURNAL
卷 243, 期 -, 页码 207-216出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.01.014
关键词
Benzene hydrogenation; Cyclohexene; Zirconia-modified MCM-41; Surface property; Ruthenium-lanthanum catalyst
资金
- NSFC [21276218]
- Program for New Century Excellent Talents in University [NCET-10-0168]
- SRFDP [20124301110007]
- Scientific Research Fund of Hunan Provincial Education Department [13K043]
- Project of Hunan Provincial Science & Technology Department [2012FJ1001]
The effects of the preparation conditions on the crystal form and surface properties of zirconia were studied. Mesoporous MCM-41 modified by tetragonal and monoclinic zirconia were synthesized by hydrothermal and precipitation methods. Then MCM-41 and zirconia-modified MCM-41 supported ruthenium-lanthanum catalysts were prepared via cyclohexane-water double solvent impregnation method. The obtained supports and catalysts were characterized by powder X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy, N-2 adsorption-desorption, thermogravimetric and differential scanning calorimetry, temperature programmed desorption of NH3, static water/benzene adsorption techniques. It has been found that MCM-41 modified by tetragonal zirconia with exclusive Lewis-acidic sites exhibits more surface hydroxyl groups and higher hydrophilicity than MCM-41 modified by monoclinic and amorphous zirconia. Tetragonal zirconia-modified MCM-41 supported ruthenium-lanthanum catalyst shows better catalytic performance in benzene hydrogenation to cyclohexene with benzene conversion of 54.4% and cyclohexene selectivity of 84.7%. (C) 2014 Elsevier B.V. All rights reserved.
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