Efficient Hydrolysis of Lignocellulose by Acidic Ionic Liquids under Low-Toxic Condition to Microorganisms
Efficient Hydrolysis of Lignocellulose by Acidic Ionic Liquids under Low-Toxic Condition to Microorganisms
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DOI：
10.3390/catal7040108
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发表时间：
2017-04
期刊：
影响因子：
3.9
通讯作者：
Kosuke Kuroda;Ken-ichiro Inoue;Kyohei Miyamura;H. Satria;K. Takada;K. Ninomiya;Kenji Takahashi
中科院分区：
文献类型：
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作者：
Kosuke Kuroda;Ken-ichiro Inoue;Kyohei Miyamura;H. Satria;K. Takada;K. Ninomiya;Kenji Takahashi
木质纤维素是一种可再生资源，酸性离子液体是纤维素水解的有效催化剂。为了实现连续的水解和发酵，用充分稀释的酸性离子液体进行有效水解是必要的，因为酸性离子液体对发酵微生物是有毒的。证实大肠杆菌在0.05 M稀酸性离子液体-1-（1-丁基磺酸）-3-甲基咪唑鎓硫酸氢盐（[Sbmim][HSO 4]）中生长，尽管在更浓的溶液中生长受到抑制。因此，我们将0.05 M [Sbmim][HSO 4]溶液应用于甘蔗渣的水解，导致在190 °C下48%的葡萄糖产率。该值大于用不适合大肠杆菌生长的浓缩[Sbmim][HSO 4]溶液获得的值（产率：1.0 M溶液中40%）。实现了酸性离子液体在低毒条件下的高效水解。
Lignocellulose is known as a renewable resource, and acidic ionic liquids have been highlighted as efficient catalysts for hydrolysis of cellulose. To achieve successive hydrolysis and fermentation, efficient hydrolysis with sufficiently diluted acidic ionic liquids is necessary because acidic ionic liquids are toxic to fermentative microorganisms. Escherichia coli was confirmed to grow in 0.05 M dilute acidic ionic liquid—1-(1-butylsulfonic)-3-methylimidazolium hydrogen sulfate ([Sbmim][HSO4])—although the growth was suppressed in more concentrated solutions. Therefore, we applied the 0.05 M [Sbmim][HSO4] solution to hydrolysis of bagasse, leading to a glucose yield of 48% at 190 °C. This value is greater than that obtained with a concentrated [Sbmim][HSO4] solution, which is not suitable for the growth of Escherichia coli (yield: 40% in a 1.0 M solution). Efficient hydrolysis with acidic ionic liquids under low-toxic condition was achieved.