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| Preparation and catalytic activity of SO42-／Zr-MCM-48 and SO42-／Al-MCM-48 solid acid catalysts |
| School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract Zr(or Al)-MCM-48 mesoporous molecular sieves were synthesized via hydrothermal method, and SO42-/Zr(or Al)-MCM-48 solid acid catalysts were prepared by wet impregnation in H2SO4 solution. The samples were characterized by X-ray diffraction (XRD), NH3 temperature-programmed desorption (NH3-TPD) and N2 physical adsorption. The catalytic activities of solid acid catalysts were evaluated by alkylation reaction of phenol with tert-butyl alcohol. The results show that SO42-/Zr-MCM-48 and SO42-/Al-MCM-48 samples still maintain cubic mesoporous framework of MCM-48. Compared with Zr-MCM-48 and Al-MCM-48 samples, the specific surface areas and mesoporous orderings are slightly decreased. The results of alkylation reaction show that SO42-/Zr-MCM-48 catalyst exhibits much high catalytic activity of phenol conversion and 4-tert-butyl phenol(4-TBP) selectivity, and the maximum phenol conversion of 91.6% is obtained at reaction temperature of 140 ℃.
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Received: 06 January 2013
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2014, Vol. 35 
