Efficient Hydrolysis of Polysaccharides in Bagasse by in Situ Synthesis of an Acidic Ionic Liquid after Pretreatment
Efficient Hydrolysis of Polysaccharides in Bagasse by in Situ Synthesis of an Acidic Ionic Liquid after Pretreatment
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DOI：
10.1021/acssuschemeng.6b02055
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发表时间：
2017-01-01
影响因子：
8.4
通讯作者：
Takahashi, Kenji
中科院分区：
文献类型：
--
作者：
Satria, Heri;Kuroda, Kosuke;Takahashi, Kenji
提出了一种高效的酸性离子液体水解生物质的方法：用H2SO 4预处理生物质，简单原位合成酸性离子液体，1-（1-丁基磺酸）-3-甲基咪唑鎓硫酸氢盐（[（HSO 3）（4）C（4）C（1）im] HSO 4），通过向预处理的溶液中加入两性离子;随后在微波加热下在100 ℃下在[（HSO 3）（4）C（4）C（1）im] HSO 4溶液中水解。葡萄糖和木糖的高产率（分别约80%和100%）归因于H2SO 4的预处理和[（HSO 3）（4）C（4）C（1）im] HSO 4的高效催化活性。高产率与先前文献中在约100 ° C下酸水解的最高产率相当，并且本方法实现了更快速的水解。葡萄糖和木糖的分解可以忽略不计，因为反应温度相对温和。我们还确定了一种电渗析方法，将[（HSO_3）（4）C（4）C（1）im] HSO_4分离成H_2SO_4和两性离子，以重复使用。在电渗析过程中，几乎所有的H2SO 4（97%）被转移到浓缩室，99%的两性离子交换剂保留在稀释室中。
A highly efficient hydrolytic method using an acidic ionic liquid is proposed: pretreatment of biomass with H2SO4; simple in situ synthesis of an acidic ionic liquid, 1-(1-butylsulfonic)-3-methylimidazolium hydrosulfate ([(HSO3)(4)C(4)C(1)im]HSO4), through addition of a zwitterion to the pretreated solution; and subsequent hydrolysis in the [(HSO3)(4)C(4)C(1)im]HSO4 solution at 100 degrees C under microwave heating. The high yields of glucose and xylose (around 80 and 100%, respectively) were attributed to the pretreatment by H2SO4 and the efficient catalytic activity of the [(HSO3)(4)C(4)C(1)im]HSO4. The high yields were comparable to the highest yields of acid hydrolysis at around 100 degrees C among previous literature, and the present method achieved more rapid hydrolysis. Decomposition of glucose and xylose was negligible because the reaction temperature was relatively mild. We also identified an electrodialysis method to separate [(HSO3)(4)C(4)C(1)im]HSO4 into H2SO4 and the zwitterion for reuse. Almost all of the H2SO4 (97%) was transferred to the concentrate compartment, and 99% of the zwitterion remained in the dilute compartment during electrodialysis.