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首页> 外文会议>Annual North American Waste to Energy Conference(NAWTEC15); 20070521-23; Miami,FL(US) >DETERMINATION OF COMPOSITION OF CELLULOSE AND LIGNIN MIXTURES USING THERMO GRAVIMETRIC ANALYSIS (TGA)
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DETERMINATION OF COMPOSITION OF CELLULOSE AND LIGNIN MIXTURES USING THERMO GRAVIMETRIC ANALYSIS (TGA)

机译：热重分析法（TGA）测定纤维素和木质素混合物的组成

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摘要

The proportional composition of cellulose, hemicellulose, lignin and minerals in a biomass plays a significant role in the proportion of pyrolysis products (bio-oil, char, and gases). Traditionally, the composition of biomass is chemically determined, which is a time consuming process. This paper presents the results of a preliminary investigation of a method using thermo-gravimetric analysis for predicting the fraction of cellulose and lignin in lignin-cellulose mixtures. The concept is based on a newly developed theory of Pyrolytic Unit Thermographs (PUT). The Pyrolytic Unit Thermograph (PUT) is a thermograph showing rate of change of biomass weight with respect to temperature for a unit weight loss. These PUTs were used as input for two predictive mathematical procedures that minimize noise to predict the fractional composition in unknown lignin-cellulose mixtures. The first model used linear correlations between cellulose/lignin content and peak decomposition rate while the second method used a system of linear equations. Results showed that both models predicted the composition of lignin-cellulose mixture within 7 to 18% of measured value. The promising results of this preliminary study will certainly motivate further refinement of this method through advanced research
机译：生物质中纤维素，半纤维素，木质素和矿物质的比例组成在热解产物（生物油，焦炭和气体）的比例中起着重要作用。传统上，生物量的组成是化学确定的，这是一个耗时的过程。本文介绍了使用热重分析法预测木质素-纤维素混合物中纤维素和木质素含量的方法的初步研究结果。该概念基于最新开发的热解单元热像仪（PUT）理论。热解单元热像图（PUT）是热图，显示了单位重量损失的生物质重量相对于温度的变化率。这些PUT用作两个预测数学程序的输入，该程序将噪音降至最低，以预测未知木质素-纤维素混合物中的分数组成。第一个模型使用纤维素/木质素含量与峰分解速率之间的线性相关性，而第二个模型使用线性方程组。结果表明，两个模型都预测木质素-纤维素混合物的成分在测量值的7％到18％之内。这项初步研究的有希望的结果肯定会通过高级研究来激励进一步完善此方法。

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