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《China Forest Products Industry》 2018-04
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Thermal Stability and Decomposition Kinetics Parameters of Chinese Fir Cellulose

SUN Ke;QI Chu-sheng;WANG Li-jun;LIU Zhi-jia;Beijing Forestry University;Research Institute of Wood Industry of Chinese Academy of Forestry;  
Thermal stability and decomposition kinetics parameters of Chinese fir cellulose are key factors for modeling high-temperature thermal treatment of Chinese fir. Chemical method was employed in this study to separate the main chemical components of Chinese fir, and their thermal stability properties were tested by thermogravimetry analyzer at different heating rates. Furthermore, Flynn-Wall-Ozawa method, Friedman method and ASTM E1641 were used to calculate the activation energy and pre-exponential factor of cellulose.The results show that the content of cellulose, hemicelluloses, Klason lignin and Benzene-alcohol extractives is 48.5%, 19.9%, 33.5% and 2.6% separately. The temperature peak of thermal decomposition of cellulose at heating rate of 1, 5, 10, 15 ℃/min and 20℃/min is 293.8, 320.4, 332.4, 340.3 ℃ and 346.0 ℃ separately. The activation energy and pre-exponential factor changes with decomposition rate and calculation methods, the average of activation energy between decomposition rate of 0.3 and 0.6 is 167.3, 160.9 kJ/mol and 164.4 kJ/mol for FWO, Friedman and ASTM E1641 method independently, while the average natural logarithm of preexponential factor is 33.2, 32.4 min~(-1) and 34.5 min~(-1) independently.
【Fund】: 北京林业大学“北京市大学生科学研究与创业行动计划”(S201710022042);北京林业大学“国家级大学生创新创业训练计划”(201610022056);北京林业大学科技创新项目(2017PT04);; 中国博士后科学基金(2016M591289)
【CateGory Index】: TQ351.011
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