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 PrSO3H 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 PrSO3H groups. Maximal acetic acid conversion was attained under acid-rich conditions with aromatic alcohols, outperforming Amberlyst or USY zeolites, with additional excellent water tolerance.
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Funding: EPSRC (EP/K000616/2, EP/G007594/4 and EP/K014749/1 and a Leadership Fellowship); Royal Society for an Industry Fellowship; and European Union 7FP (FP7/2007–2013) grant 604307.
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C. Manayil, J. (Creator), Inocencio, C. V. M. (Creator), Lee, A. (Creator) & Wilson, K. (Creator), Aston Data Explorer, 2015