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Alumination of Si-KIT-6 materials with ordered three-dimensional (3D) structure were prepared by post-synthesis method with various Si/Al ratios. The catalysts were characterized by X-ray diffraction analysis (XRD), N 2 porosimetry and FT-IR spectra. The presence of framework and extra framework aluminium was predicted by Aluminium MAS NMR. The strength of the acid sites of the catalysts was...
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