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首页> 外文期刊>RSC Advances >Br?nsted acidic ionic liquids for cellulose hydrolysis in an aqueous medium: structural effects on acidity and glucose yield
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Br?nsted acidic ionic liquids for cellulose hydrolysis in an aqueous medium: structural effects on acidity and glucose yield

机译：用于水介质中纤维素水解的布朗斯台德酸性离子液体：对酸度和葡萄糖产率的结构影响

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摘要

The conversion of cellulose into valuable chemicals has attracted much attention, due to the concern about depletion of fossil fuels. The hydrolysis of cellulose is a key step in this conversion, for which Br?nsted acidic ionic liquids (BAILs) have been considered promising acid catalysts. In this study, using BAILs with various structures, their acidic catalytic activity for cellulose hydrolysis assisted by microwave irradiation was assessed using the Hammett acidity function ( H _(0) ) and theoretical calculations. The glucose yields exceeded 10% when the H _(0) values of the BAIL aqueous solutions were below 1.5. The highest glucose yield was about 36% in 1-(1-octyl-3-imidazolio)propane-3-sulfonate (Oimps)/sulfuric acid (H _(2) SO _(4) ) aqueous solution. A long alkyl side chain on the imidazolium cation, which increased the hydrophobicity of the BAILs, enhanced the glucose yield.
机译：由于担心化石燃料的消耗，纤维素向有价值的化学物质的转化引起了广泛的关注。纤维素的水解是该转化过程中的关键步骤，为此，布朗斯台德酸性离子液体（BAIL）被认为是很有前途的酸催化剂。在这项研究中，使用具有不同结构的BAIL，使用哈米特（Hammett）酸度函数（H _（0））和理论计算来评估其在微波辐射辅助下对纤维素水解的酸性催化活性。当BAIL水溶液的H_（0）值低于1.5时，葡萄糖产率超过10％。在1-（1-辛基-3-咪唑啉基）丙烷-3-磺酸盐（Oimps）/硫酸（H _（2）SO _（4））水溶液中，最高葡萄糖产率约为36％。咪唑鎓阳离子上的长烷基侧链增加了BAIL的疏水性，从而提高了葡萄糖产量。

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