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Catalyzed modified clean fractionation of prairie cordgrass integrated with hydrothermal post-treatment

机译：结合水热后处理的催化改性clean草分级分离

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摘要

The main purpose of this study was pretreatment of prairie cordgrass obtaining three fractions: lignin, hemicellulose and fermentable cellulose. Modified clean fractionation process (using ethyl acetate-ethanol-water mixture) was employed to extract lignin and hemicellulose fractions. Different proportions of constituents in the solvent mixture were tested. In order to improve lignin recovery, the process was catalyzed with sulfuric acid. Optimization was performed for fractionation processing conditions using lignin recovery and glucose yields as primary response variables. Optimal conditions resulted in a 51.33% lignin recovery, 53.82% hydrolysis glucose yield and 33.73% xylose yield in the aqueous fraction. To improve cellulose digestibility, solid fraction was subjected to hydrothermal post-treatment, for which optimal processing conditions were found, resulting in 78.93% hydrolysis glucose yield. This research represents a step forward for biomass pretreatment, and may open up new possibilities for utilization of prairie cordgrass.
机译：这项研究的主要目的是对草原草进行预处理，得到三个部分：木质素，半纤维素和可发酵纤维素。采用改进的清洁分级分离工艺（使用乙酸乙酯-乙醇-水混合物）提取木质素和半纤维素级分。测试了溶剂混合物中不同比例的成分。为了提高木质素的回收率，该过程用硫酸催化。使用木质素回收率和葡萄糖产量作为主要响应变量，对分馏工艺条件进行了优化。最佳条件导致含水部分中木质素的回收率为51.33％，水解葡萄糖的产率为53.82％，木糖的产率为33.73％。为了提高纤维素的消化率，对固体馏分进行了水热后处理，发现了最佳的加工条件，水解糖的收率为78.93％。这项研究代表了生物质预处理的进步，并可能为利用草原草草开辟新的可能性。

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  • 来源
    《Biomass & bioenergy》 |2012年第11期|389-401|共13页
  • 作者

    Iwona Cybulska; Grzegorz Brudecki; Kurt Rosentrater; Hanwu Lei; James Julson;

  • 作者单位

    Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA;

    Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA;

    Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA;

    College of Engineering and Architecture, Washington State University, Richland, WA 99352, USA;

    Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    clean fractionation; organosolv treatment; hydrothermal treatment; prairie cordgrass (spartina pectinata); ethanol; lignin;

    机译：清洁分馏;有机溶剂处理;水热处理草原草（spartina pectinata）;乙醇木质素;

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