水热预处理对樟木屑制备成型燃料行为的影响

doi:10.3969/j.issn.0253-2417.2017.04.019

Abstract

Abstract: In the present work, the effect of hydrothermal preatment on pelletization energy consumption and pellets' properties was carried out. The woody sawdust (Cinnamomum camphora (L.)Presl) was pretreated by hydrothermal pretreatment in the temperature range of 200-260℃, and then compressed into woody pellets, in order to solve the current problem of low quality of pellet properties in woody pellet industry. It was shown that the content of fines and the pellets' Meyer hardness were increased after the hydrothermal preatment. However, the plasticity of sawdust was reduced during hydrothermal pretreatment, resulting in the increase of compaction and extrusion energy consumption during pelletization. The decomposition of hemicellulose was improved during hydrothermal pretreatment, decreasing the moisture absorption and volatile content of pellets. The ignition temperature and burnout temperature of pellets were enhanced after hydrothermal preatment, which decreased the maximum buring rate, resulting in the increment of Composite combustion characteristic index from 6.96 mg²/(min²·℃³)to 1.89-3.44 mg²/(min²·℃³). Therefore, the hydrothermal preatment of Cinnamomum camphora (L.) Presl could improve the burning stablity and safty of pellets.

Key words: sawdust, hydrothermal pretreatment, pellet, hardness, composite combustion characteristic index

CLC Number:

TQ35
X712

LI Shiwei, YANG Jingling, LI Hui, TAN Mengjiao, HUANG Zhongliang, LI Changzhu. Effect of Hydrothermal Pretreatment on Pelletization of Cinnamomum camphora (L.) Presl[J]. Chemistry and Industry of Forest Products, 2017, 37(4): 129-136.

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Effect of Hydrothermal Pretreatment on Pelletization of Cinnamomum camphora (L.) Presl

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