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Octyl Co‐grafted PrSO 3 H/SBA‐15: Tunable Hydrophobic Solid Acid Catalysts for Acetic Acid Esterification
Author(s) -
Manayil Jinesh C.,
dos Santos Vannia C.,
Jentoft Friederike C.,
Granollers Mesa Marta,
Lee Adam F.,
Wilson Karen
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201601370
Subject(s) - acetic acid , catalysis , inverse gas chromatography , chemistry , methanol , mesoporous silica , mesoporous material , surface modification , organic chemistry , nuclear chemistry , adsorption
Propylsulfonic acid (PrSO 3 H) derivatised solid acid catalysts have been prepared by post‐modification of mesoporous SBA‐15 silica with mercaptopropyltrimethoxysilane (MPTMS), and the impact of co‐derivatisation with octyltrimethoxysilane (OTMS) groups to impart hydrophobicity to the catalyst was investigated. Turnover frequencies (TOFs) for acetic acid esterification with methanol increase with PrSO 3 H surface coverage across both families, suggesting a cooperative effect between adjacent acid sites at high acid site densities. Esterification activity is further promoted upon co‐functionalisation with hydrophobic octyl chains, with inverse gas chromatography (IGC) measurements indicating that the increased activity correlates with decreased surface polarity or increased hydrophobicity.