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首页> 外文期刊>Bioprocess and Biosystems Engineering >A novel cleaning process for industrial production of xylose in pilot scale from corncob by using screw-steam-explosive extruder
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A novel cleaning process for industrial production of xylose in pilot scale from corncob by using screw-steam-explosive extruder

机译:利用螺杆蒸汽-爆炸挤出机从玉米芯中试规模工业生产木糖的新型清洁工艺

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摘要

Steam explosion is the most promising technology to replace conventional acid hydrolysis of ligno-cellulose for biomass pretreatment. In this paper, a new screw-steam-explosive extruder was designed and explored for xylose production and lignocellulose biorefinery at the pilot scale. We investigated the effect of different chemicals on xylose yield in the screw-steam-explosive extrusion process, and the xylose production process was optimized as followings: After pre-impregnation with sulfuric acid at 80 ℃ for 3 h, corncob was treated at 1.55 MPa with 9 mg sulfuric acid/g dry corncob (DC) for 5.5 min, followed by countercurrent extraction (3 recycles), decoloration (activated carbon dosage 0.07 g/g sugar, 75 ℃ for 40 min), and ion exchange (2 batches). Using this process, 3.575 kg of crystal xylose was produced from 22 kg corncob, almost 90 % of hemicellulose was released as monomeric sugar, and only a small amount of by-products was released (formic acid, acetic acid, fural, 5-hydroxymethylfurfural, and phenolic compounds were 0.17, 1.14, 0.53, 0.19, and 1.75 g/100 g DC, respectively). All results indicated that the screw-steam-explosive extrusion provides a more effective way to convert hemicellulose into xylose and could be an alternative method to traditional sulfuric acid hydrolysis process for lignocellulose biorefinery.
机译:蒸汽爆炸是最有前途的技术,可代替常规的木质纤维素酸水解进行生物质预处理。在本文中,设计并探索了一种新型的螺杆蒸汽爆炸式挤出机,用于中试规模的木糖生产和木质纤维素生物精炼。我们研究了螺旋蒸汽爆炸挤出过程中不同化学物质对木糖产量的影响,并优化了木糖的生产过程,方法如下:在80℃的硫酸中预浸渍3小时后,玉米芯在1.55 MPa下处理用9 mg硫酸/ g干玉米芯(DC)进行5.5分钟,然后进行逆流萃取(3个循环),脱色(活性炭用量0.07 g / g糖,75℃进行40分钟)和离子交换(2批) 。使用此方法,从22千克玉米芯中可制得3.575千克结晶木糖,几乎90%的半纤维素以单体糖的形式释放,仅释放出少量的副产物(甲酸,乙酸,糠醛,5-羟甲基糠醛和酚类化合物分别为0.17、1.14、0.53、0.19和1.75 g / 100 g DC。所有结果表明,螺杆蒸汽爆炸挤出提供了一种将半纤维素转化为木糖的更有效方法,并且可能是木质纤维素生物精炼厂传统硫酸水解工艺的替代方法。

著录项

  • 来源
    《Bioprocess and Biosystems Engineering》 |2014年第12期|2425-2436|共12页
  • 作者单位

    College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;

    College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;

    Research Center of Futaste Pharmaceutical Co. Ltd, Yucheng 251200, China;

    College of Mechanic and Electronic Engineering, Beijing University of Chemical Technology, Beijing 100029, China;

    College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;

    College of Mechanic and Electronic Engineering, Beijing University of Chemical Technology, Beijing 100029, China;

    College of Material Science and Technology, Beijing Forest University, Beijing 100083, China;

    Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA;

    Department of Microbiology, College of Life Science, Nankai University, Tianjin 300071, China;

    College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Xylose; Pilot scale; Steam explosion; Cleaning process; Extrusion;

    机译:木糖;试点规模蒸汽爆炸;清洁过程;挤压;

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