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首页> 外文期刊>Energy Conversion & Management >Towards the development of a novel 'bamboo-refinery' concept: Selective bamboo fractionation by means of a microwave-assisted, acid-catalysed, organosolv process
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Towards the development of a novel 'bamboo-refinery' concept: Selective bamboo fractionation by means of a microwave-assisted, acid-catalysed, organosolv process

机译：迈向新的“竹精炼厂”概念的发展：通过微波辅助，酸催化的有机溶剂法选择性进行竹分离

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摘要

This work addresses a novel microwave-assisted, acid-catalysed, organosolv (EtOH/H2O) system for the selective fractionation of bamboo, examining the effects of the temperature (110-190 degrees C), solvent system (EtOH/H2O) and catalyst amount (0-5 vol.% formic acid) on the process. The statistical analysis of the results revealed that the operating variables have a significant influence on bamboo fractionation, allowing the selective production of (i) a cellulose-rich solid fraction, (ii) a hemicellulose rich water-soluble fraction and (iii) a lignin rich solid fraction. The yields of each of these fractions varied between 51 and 94%, 2 and 23% and 2 and 32%, respectively. Increasing temperature exerted a positive effect on bamboo decomposition, increasing the overall bamboo conversion and influencing the effect that the solvent system (EtOH/H2O) has on the process. At low temperature (110 degrees C) the solvent system does not have much influence, while a synergetic interaction between EtOH and H2O took place at higher temperatures, which allowed better results to be obtained with EtOH/H2O mixtures than with the pure solvents alone. The effect of the catalyst was relatively weak, being greatest when using a high temperature (190 degrees C) and high proportions of water (85 vol.%) in the solvent system. With respect to the properties of each fraction, the cellulose rich solid fraction was made up of un-reacted cellulose (44-83 wt. %), hemicellulose (0-21 wt.%) and lignin (12-34 wt.%); the water-soluble hemicellulose rich fraction consisted of a mixture of oligomers, sugars, carboxylic acids, ketones and furans; and the solid rich lignin fraction comprised high purity (95 wt.%) organosolv lignin. The optimisation of the process revealed that by using a temperature of 190 degrees C, a solvent system consisting of 45 vol.% EtOH and 55 vol.% H2O with a concentration of formic acid of 5 vol.% it is possible to fractionate bamboo into a high purity (84 wt.%) cellulose solid fraction, very pure (95%) organosolv lignin and a rich water-soluble hemicellulose fraction consisting of a mixture of oligomers (27 wt.%), sugars (56 wt.%) and carboxylic acids (14 wt.%); thus converting this process into a very promising method for the selective fractionation of bamboo.
机译：这项工作研究了一种新型的微波辅助酸催化有机溶剂（EtOH / H2O）系统，用于竹的选择性分馏，研究了温度（110-190摄氏度），溶剂系统（EtOH / H2O）和催化剂的影响量（0-5％（体积）的甲酸）。结果的统计分析表明，操作变量对竹分级分离具有重大影响，从而可以选择性地生产（i）富含纤维素的固体部分，（ii）富含半纤维素的水溶性部分和（iii）木质素丰富的固体部分。这些部分的每一个的产率分别在51％和94％，2％和23％以及2％和32％之间变化。温度的升高对竹子的分解产生积极的影响，增加了竹子的整体转化率，并影响了溶剂体系（EtOH / H2O）对该工艺的影响。在低温（110摄氏度）下，溶剂体系的影响不大，而在较高温度下EtOH和H2O之间发生协同作用，与单独使用纯溶剂相比，EtOH / H2O混合物可获得更好的结果。催化剂的作用相对较弱，在溶剂体系中使用高温（190摄氏度）和高比例的水（> 85体积％）时效果最佳。关于每个级分的性质，富含纤维素的固体级分由未反应的纤维素（44-83重量％），半纤维素（0-21重量％）和木质素（12-34重量％）组成。 ;水溶性富含半纤维素的馏分由低聚物，糖，羧酸，酮和呋喃的混合物组成；富含固体的木质素级分包含高纯度（> 95 wt。％）的有机溶剂木质素。工艺的优化表明，通过使用190摄氏度的温度，由45％（体积）的EtOH和55％（体积）的H2O组成的溶剂体系，甲酸的浓度为5％（体积），可以将竹子分馏为高纯度（84 wt。％）的纤维素固体馏分，非常纯净的（> 95％）有机溶剂木质素和丰富的水溶性半纤维素馏分，由低聚物（27 wt。％），糖（56 wt。％）的混合物组成和羧酸（14重量％）；因此，将这一过程转化为非常有希望的竹子选择性分馏方法。

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  • 来源
    《Energy Conversion & Management》 |2018年第1期|147-160|共14页
  • 作者

    Li T.; Remon J.; Jiang Z.; Budarin V. L.; Clark J. H.;

  • 作者单位

    Univ York, Dept Chem, Green Chem Ctr Excellence, York YO10 5DD, N Yorkshire, England;

    Univ York, Dept Chem, Green Chem Ctr Excellence, York YO10 5DD, N Yorkshire, England;

    Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Sichuan, Peoples R China;

    Univ York, Dept Chem, Green Chem Ctr Excellence, York YO10 5DD, N Yorkshire, England;

    Univ York, Dept Chem, Green Chem Ctr Excellence, York YO10 5DD, N Yorkshire, England;

  • 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

    Microwaves; Bamboo; Organosolv; Biomass fractionation; Value-added products;

    机译：微波;竹;有机溶剂;生物质分馏;增值产品;

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