Torrefaction and low-temperature carbonization of woody biomass: Evaluation of fuel characteristics of the products
Preprocessing of woody biomass was performed with torrefaction and low-temperature carbonization. In this study, the pretreated samples have been used to evaluate the energy yield and fuel characteristics. The combustion profiles of the torrefied sample and the low-temperature carbonized sample blen...
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Published in | Energy (Oxford) Vol. 45; no. 1; pp. 676 - 685 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier Ltd
01.09.2012
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Preprocessing of woody biomass was performed with torrefaction and low-temperature carbonization. In this study, the pretreated samples have been used to evaluate the energy yield and fuel characteristics. The combustion profiles of the torrefied sample and the low-temperature carbonized sample blended with coal were examined in order to analyze the characteristics of co-combustion. Energy yields of 80−98% in torrefied samples and 46−63% in low-temperature carbonized samples were observed. It was found that in the low-temperature carbonization zone, the coal band moved toward that of coal. The number of differential thermogravimetric peaks decreased from two to one with an increase in the thermal-treatment temperature. In the case of samples blended with coal and low-temperature carbonized samples at 350°C, it has been confirmed that the activation energy and all index parameters decreased as the blend ratio increased. It was confirmed that as a result, the combustion rate (dα/dt) became higher owing to an increased value of the constant (k), which represents the reaction rate. However, in the case of the sample torrefied at 275°C, it was I confirmed that the combustion rate was not the same, according to the co-combustion ratio, because of an opposite tendency shown in the devolatilization and char combustion stages. |
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Bibliography: | http://dx.doi.org/10.1016/j.energy.2012.07.024 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0360-5442 |
DOI: | 10.1016/j.energy.2012.07.024 |