Preparation and Catalytic Properties of Fe-Ti-MCM-41

doi:10.3969/j.issn.0251-0790.2012.07.035

Abstract

Abstract: Fe incorporated Ti-MCM-41 catalysts were prepared by incipient wetness impregnation method. The samples were characterized by X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), high resolution transmission electron microscopy(HRTEM), nitrogen adsorption-desorption isotherms and inductively coupled plasma atomic emission spectrometry(ICP). The effects of doping amounts of Fe and calcination temperature on the catalytic performance of the catalyst were investigated. Catalytic activity tests were conducted in the epoxidation of cis-cyclooctene with aqueous H₂O₂ as an oxidant. It is found that incorporation of low amount of ferric into the mesoporous material favors to obtain Fe-Ti-MCM-41 catalyst with high catalytic activity. The enhanced catalytic activity may be attributed to that the majority of Fe³⁺ are highly dispersed by single molecule, which brings up efficient excitation of Ti active sites. More loading amount of Fe³⁺ leaded to the cluster, so the conversion and selectivity of cyclooctene epoxide decreased.

Key words: Ti-MCM-41 sieve, Ferric ion doping, Epoxidation, cis-Cyclooctene

CLC Number:

O643

TrendMD:

YANG Mu, WANG Xiao-Na, XU Jin-Wu, WANG Ge. Preparation and Catalytic Properties of Fe-Ti-MCM-41[J]. Chem. J. Chinese Universities, 2012, 33(07): 1559.

References

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