Mesoporous sulfonic acid silicas for pyrolysis bio-oil upgrading via acetic acid esterification
Mesoporous sulfonic acid silicas for pyrolysis bio-oil upgrading via acetic acid esterification
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DOI：
10.1039/c5gc01889g
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发表时间：
2016-01-01
期刊：
影响因子：
9.8
通讯作者：
Wilson, Karen
中科院分区：
文献类型：
--
作者：
Manayil, Jinesh C.;Inocencio, Carlos V. M.;Wilson, Karen
采用巯基丙基三甲氧基硅烷（MPTMS）对SBA-15进行后改性，制备了丙基磺酸衍生化SBA-15催化剂，并将其用于乙酸与苯甲醇在甲苯中的酯化反应。乙酸转化率和乙酸苄酯生产率与PrSO 3 H表面覆盖率成正比，达到最大饱和吸附层。营业额酯化频率增加与磺酸表面密度，这表明相邻的PrSO 3 H基团的协同效应。在富酸条件下，用芳族醇获得最大乙酸转化率，优于Amberlyst或USY沸石，具有额外的优异的耐水性。
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.