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首页> 外文期刊>Bioenergy research >Structural and Hydrolysis Characteristics of Cypress Pretreated by Ionic Liquids in a Microwave Irradiation Environment
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Structural and Hydrolysis Characteristics of Cypress Pretreated by Ionic Liquids in a Microwave Irradiation Environment

机译：微波辐射环境下离子液体预处理的柏树的结构和水解特性

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In the transformation of lignocellulosic biomass into simple sugars that are suitable for microbial fermentation to biofuels, the pretreatment process that increases susceptibility to enzymatic hydrolysis is of the utmost importance. Combination of microwave irradiation as heating mode and ionic liquids (ILs) as solvents was employed in the pretreatment of cypress to figure out the hydrolysis characteristics. Three ILs, namely 1-allyl-methylimidazolium chloride ([Amim]Cl), 1-butyl-3-methylimidazolium bromide ([Bmim]Br), and 1-ethyl-3-methylimidazolium acetate ([Emim]Ac), were used to dissolve wood flour under microwave irradiation, and the cellulosic fractions were regenerated by the addition of alkaline aqueous solution at room temperature. The structural analyses of the regenerated wood were examined offering a scientific understanding into the synergistic effects of microwave irradiation and ILs pretreatment on the efficiencies of cellulase enzymatic hydrolyses. The results showed that [Emim]Ac-regenerated cellulose possessed the highest enzyme saccharification yield (87.1 %) followed by [Amim]Cl (74.9 %) and [Bmim]Br (67.6 %). The highest yield from enzymatic hydrolysis of [Emim]Ac regenerated cellulose was in line with the observations of structural analysis, which indicated a more disrupted and amorphous structure. Results revealed that dissolution of cypress in ILs under the environment of microwave irradiation is a potential alternative method for the pretreatment of lignocellulosic materials. Both microwave irradiation and [Emim]Ac dissolution, which was screened as the best medium for this pretreatment, were found to increase the rate and yield of enzymatic hydrolysis significantly.
机译：在将木质纤维素生物质转化为适于微生物发酵为生物燃料的单糖中，提高酶水解敏感性的预处理过程至关重要。在柏树的预处理中，结合微波辐射作为加热方式和离子液体（ILs）作为溶剂，以求得其水解特性。使用了三种IL，即1-烯丙基甲基咪唑鎓氯化物（[Amim] Cl），1-丁基-3-甲基咪唑鎓溴化物（[Bmim] Br）和1-乙基-3-甲基咪唑鎓乙酸盐（[Emim] Ac）。在微波辐射下溶解木粉，并通过在室温下添加碱性水溶液来再生纤维素级分。检查了再生木材的结构分析，从而对微波辐射和ILs预处理对纤维素酶酶解效率的协同作用提供了科学的了解。结果表明，[Emim] Ac再生纤维素具有最高的酶糖化率（87.1％），其次是[Amim] Cl（74.9％）和[Bmim] Br（67.6％）。酶水解[Emim] Ac再生纤维素的最高收率与结构分析的观察结果一致，这表明结构更易破坏且无定形。结果表明，在微波辐射环境下，柏在ILs中的溶解是木质纤维素材料预处理的潜在替代方法。微波辐射和[Emim] Ac溶出均被筛选为该预处理的最佳介质，可显着提高酶水解的速率和产率。

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  • 来源
    《Bioenergy research》 |2014年第4期|1305-1316|共12页
  • 作者

    Ji-Kun Xu; Yong-Chang Sun; Run-Cang Sun;

  • 作者单位

    1.Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry University Tsinghua East Road No. 35 Hai-Dian District Beijing 100083 People’s Republic of China;

    1.Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry University Tsinghua East Road No. 35 Hai-Dian District Beijing 100083 People’s Republic of China;

    1.Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry University Tsinghua East Road No. 35 Hai-Dian District Beijing 100083 People’s Republic of China 2.State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 People’s Republic of China;

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  • 正文语种 eng
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  • 关键词

    Pretreatment Ionic liquids Microwave Enzymatic hydrolysis Structure;

    机译：预处理离子液体微波酶解结构。;

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