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Issue 11, 2014
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Glycerol acetylation on mesoporous KIL-2 supported sulphated zirconia catalysts

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Abstract

Zirconia nanomaterials were prepared by impregnation of KIL-2 type silica with 4, 8 and 12 wt.% ZrO2 and were modified by sulphate groups in order to vary the type and strength of acidity. Samples were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and N2 physisorption methods. Acidic properties of adsorbed pyridine were investigated by FT-IR spectroscopy. The catalytic performance of ZrKIL-2 and SO42−/ZrKIL-2 in glycerol esterification with acetic acid was studied and compared to that of pure zirconia varieties. It was found that silica-supported zirconia samples are more active than pure zirconia ones. With increasing ZrO2 content, KIL-2-supported catalysts showed increasing catalytic activity and selectivity in producing valuable fuel additives, di- and triacetyl glycerols. Sulphated analogues showed even higher activity and selectivity compared to non-sulphated ones due to their strong Brönsted acidity.

Graphical abstract: Glycerol acetylation on mesoporous KIL-2 supported sulphated zirconia catalysts

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The article was received on 29 Apr 2014, accepted on 26 Jun 2014 and first published on 26 Jun 2014


Article type: Paper
DOI: 10.1039/C4CY00548A
Catal. Sci. Technol., 2014,4, 3993-4000

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    Glycerol acetylation on mesoporous KIL-2 supported sulphated zirconia catalysts

    M. Popova, Á. Szegedi, A. Ristić and N. N. Tušar, Catal. Sci. Technol., 2014, 4, 3993
    DOI: 10.1039/C4CY00548A

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