Characteristic Time Analysis of Biomass Torrefaction Phenomena - Application to Thermogravimetric Analysis Device

被引:10
作者
Martinez, Mara Gonzalez [1 ]
Dupont, Capucine [1 ]
Thiery, Sebastien [1 ]
Meyer, Xuan Mi [2 ,3 ]
Gourdon, Christophe [2 ,3 ]
机构
[1] CEA Grenoble, LITEN, DTBH, LPB, 17 Rue Martyrs, F-38054 Grenoble, France
[2] Univ Toulouse, UPS, INPT, Lab Genie Chim, 4 Allee Emile Monso, F-31030 Toulouse, France
[3] CNRS, Lab Genie Chim, F-31030 Toulouse, France
来源
2ND INTERNATIONAL CONFERENCE ON BIOMASS (ICONBM 2016) | 2016年 / 50卷
关键词
HEAT-TRANSFER; TEMPERATURE; PYROLYSIS; KINETICS;
D O I
10.3303/CET1650011
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Torrefaction is a promising mild thermal treatment for biomass waste, typically between 473 and 573 K during a few tens of minutes in a default-oxygen atmosphere. The product is a solid, with properties close to coal. Some volatile species are released at the same time as by-products, with an interesting potential as source of "green" chemicals. In this context, the behaviour of the biomass during torrefaction is studied in a thermogravimetric analyzer (TGA). In order to build a robust kinetic model, chemical regime must be ensured. This can be assessed thanks to a characteristic time analysis of physical and chemical processes involved in torrefaction. The results show that chemical regime is generally achieved at particle-scale under classical conditions of torrefaction in TGA device. However, this is not always the case at bed-scale, limitations may appear when bed thickness becomes too high (>4 mm). The proposed methodology can be applied to other torrefaction devices, in order to determine the regime as a function of the experimental conditions.
引用
收藏
页码:61 / 66
页数:6
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