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Issue 8, 2015
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Silica-immobilized Aquivion PFSA superacid: application to heterogeneous direct etherification of glycerol with n-butanol

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Abstract

We report the effective heterogenization of polymeric perfluorosulfonic acid (PFSA) Aquivion® resin in a silica network for the direct etherification of glycerol with aliphatic n-butanol. The Aquivion-silica composites, prepared by a template-free sol–gel method, presented a large specific surface area, affording highly accessible acid sulfonic groups. The textural and bulk/surface properties of the hybrid composites were characterized in-depth using TGA, acid–base titration, N2 adsorption–desorption, XRD, TEM, FTIR, Raman, CP-MAS NMR and XPS. The Aquivion-silica composites exhibited a high catalytic activity (91% n-butanol conversion) and selectivity (45% butyl glyceryl monoether yield) while they lowered the formation of by-product (6% dibutyl ether yield) as compared to benchmark homogeneous and heterogeneous acid catalysts. The catalyst was reusable and maintained a stable performance after six consecutive cycles.

Graphical abstract: Silica-immobilized Aquivion PFSA superacid: application to heterogeneous direct etherification of glycerol with n-butanol

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Publication details

The article was received on 12 Apr 2015, accepted on 20 May 2015 and first published on 20 May 2015


Article type: Paper
DOI: 10.1039/C5CY00534E
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Catal. Sci. Technol., 2015,5, 3980-3990

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    Silica-immobilized Aquivion PFSA superacid: application to heterogeneous direct etherification of glycerol with n-butanol

    W. Fang, S. Wang, A. Liebens, F. De Campo, H. Xu, W. Shen, M. Pera-Titus and J. Clacens, Catal. Sci. Technol., 2015, 5, 3980
    DOI: 10.1039/C5CY00534E

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