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Pre-processing Technology by Fine-crusher and Sub-critical Water for Cellulose Waste Ethanolization

细碎机与亚临界水纤维素废弃物乙醇化预处理技术

基本信息

批准号：
13660257
负责人：
HORIO Hisashi
金额：
$ 2.24万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13660257/
关键词：
cellulose waste treatment by sub critical water lignin liberation wood fine-crusher flail knife fine-crushing performance fractal dimension image processing 木質廃材微破砕亜臨界水エタノール微破砕機微破砕物形状

项目摘要

This project is to develop pre-processing technology of forest and timber waste, which is derived from the fine-crushed wood treatment by sub-critical water, the development of newly designed fine-crusher and the quantitative evaluation of fine-crushed wood.It was confirmed that the treatment by sub-critical water has effect of the liberation of lignin and the resolution of lignin increases as the temperature and the time of the treatment increase. However, woody cellulose is hydrolyzed to glucose and HMF under the condition of liberation of lignin. Hydrolysis of cellulose is unavoidable for the lignin liberation by sub-critical water treatment. Upon considering the matter, it shows that the chain of cellulose becomes loose. It suggests any effect of accretionary wettableness of cellulose.Crushing performance of newly designed fine-crusher was tested. The distribution of withdrew material along the axial direction of sieve is influenced by the layout of three kinds of twisted is fail k … More nives. The distribution was investigated by changing the layout, and the layout producing flat distribution was defined. Particle size distributions of withdrawn crushed wood came near to expectations. The weighted average diameter for each rotational speed was not significantly different at the sieve of ellipse polar and decreased as the rotational speed decreased at the sieve of circular hole.The quantitative values for the random and complex contours of fine-crushed wood have been calculated from fractal dimension. These values were compared with the data of weighted average diameter. These two indexes were independent each other. Fractal dimension could describe the complexity of the shape. Appropriateness of this explanation was proved in the calculation about the two images of the crushed wood, which had the different patterns on the same sieve. On the driving condition, the two indexes acted differently. In the respect that the complexity and the randomness of the shape of the fine crushed wood have direct effect upon the reaction of sub-critical water, fractal dimension is more useful than weighted average diameter. The fractal dimension of the fine-crushed wood was greatly influenced by the driving condition and the sieve type. By using this method, it is possible to optimise the shape character of fine-crushed wood for the request from the following process by sub critical-water. Less

本项目是开发亚临界水处理细碎木材所产生的森林和木材废弃物的预处理技术，研究结果表明，亚临界水处理具有释放木质素的作用，随着处理温度的升高和处理时间的延长，木质素的分解率增加。然而，木质纤维素在释放木质素的条件下水解为葡萄糖和HMF。纤维素水解是亚临界水处理释放木质素的不可避免的过程。考虑到这一点，它表明纤维素的链变得松散。对新设计的细碎机进行了破碎性能试验。三种螺旋筛的布置方式影响排出物料沿着筛轴向的分布 ...更多信息妮芙通过改变布局的方法研究了该分布，并定义了产生平坦分布的布局。取出的碎木的粒度分布接近预期。在椭圆极面筛上，各转速下的加权平均直径差异不显著，在圆孔筛上，随着转速的降低，加权平均直径逐渐减小。并与加权平均直径值进行比较。这两个指标是相互独立的。分形维数可以描述形状的复杂程度。通过对同一筛子上两种不同花纹的碎木图像的计算，证明了这一解释的正确性。在驾驶条件下，两个指标的作用不同。由于细碎木材形状的复杂性和随机性直接影响亚临界水的反应，因此分维比加权平均直径更有用。破碎条件和筛型对木材的分形维数有很大影响。利用这种方法，可以优化细碎木材的形状特征，以满足亚临界水后续工艺的要求。少