Mesoporous sulfonic acid silicas for pyrolysis bio-oil upgrading via acetic acid esterificationElectronic supplementary information (ESI) available: DRIFT spectra, porosimetry data, TGA, Pyridine adsorption spectra, esterification reaction results. See DOI: 10.1039/c5gc01889g

Propylsulfonic acid derivatised SBA-15 catalysts have been prepared by post modification of SBA-15 with mercaptopropyltrimethoxysilane (MPTMS) for the upgrading of a model pyrolysis bio-oil via acetic acid esterification with benzyl alcohol in toluene. Acetic acid conversion and the rate of benzyl a...

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Main Authors: Manayil, Jinesh C, Inocencio, Carlos V. M, Lee, Adam F, Wilson, Karen
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Summary:Propylsulfonic acid derivatised SBA-15 catalysts have been prepared by post modification of SBA-15 with mercaptopropyltrimethoxysilane (MPTMS) for the upgrading of a model pyrolysis bio-oil via acetic acid esterification with benzyl alcohol in toluene. Acetic acid conversion and the rate of benzyl acetate production was proportional to the PrSO 3 H surface coverage, reaching a maximum for a saturation adlayer. Turnover frequencies for esterification increase with sulfonic acid surface density, suggesting a cooperative effect of adjacent PrSO 3 H groups. Maximal acetic acid conversion was attained under acid-rich conditions with aromatic alcohols, outperforming Amberlyst or USY zeolites, with additional excellent water tolerance. Propylsulfonic acid derivatised SBA-15 catalysts exhibit excellent catalytic performance and water tolerance for the upgrading of a model pyrolysis bio-oil via acetic acid esterification with benzyl alcohol in toluene.
ISSN:1463-9262
1463-9270
DOI:10.1039/c5gc01889g