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Issue 2, 2010
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Hierarchical macroporous–mesoporous SBA-15 sulfonic acid catalysts for biodiesel synthesis

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Abstract

Hierarchical macroporous–mesoporous SBA-15 silicas have been synthesised via dual-templating routes employing liquid crystalline surfactants and polystyrene beads. These offer high surface areas and well-defined, interconnecting macro- and mesopore networks with respective narrow size distributions around 300 nm and 3–5 nm for polystyrene:tetraethoxysilane ratios ≥2:1. Subsequent functionalisation with propylsulfonic acid yields the first organized, macro-mesoporous solid acid catalyst. The enhanced mass transport properties of these new bi-modal solid acid architectures confer significant rate enhancements in the transesterification of bulky glyceryl trioctanoate, and esterification of long chain palmitic acid, over pure mesoporous analogues. This paves the way to the wider application of hierarchical catalysts in biofuel synthesis and biomass conversion.

Graphical abstract: Hierarchical macroporous–mesoporous SBA-15 sulfonic acid catalysts for biodiesel synthesis

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Publication details

The article was received on 17 Sep 2009, accepted on 10 Nov 2009 and first published on 16 Dec 2009


Article type: Paper
DOI: 10.1039/B919341C
Green Chem., 2010,12, 296-303

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    Hierarchical macroporous–mesoporous SBA-15 sulfonic acid catalysts for biodiesel synthesis

    J. Dhainaut, J. Dacquin, A. F. Lee and K. Wilson, Green Chem., 2010, 12, 296
    DOI: 10.1039/B919341C

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