Kinetic study of biomass pellet pyrolysis by using distributed activation energy model and Coats Redfern methods and their comparison

被引：155
作者：
Mian, Inamullah [1 ]
Li, Xian [1 ,2 ]
Jian, Yiming [1 ]
Dacres, Omar D. [2 ]
Zhong, Mei [1 ]
Liu, Jingmei [1 ]
Ma, Fengyun [1 ]
Rahman, Noor [3 ]
机构：
[1] Xinjiang Univ, Coll Chem & Chem Engn, Key Lab Coal Clean Convers & Chem Proc Autonomous, Urumqi 830000, Xinjiang, Peoples R China
[2] Huazhong Univ, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China
[3] Shaheed Banazir Bhutto Univ, Dept Chem, Dir Upper 18000, Khyber Pakhtunk, Pakistan
来源：
BIORESOURCE TECHNOLOGY | 2019年 / 294卷
基金：
中国国家自然科学基金;
关键词：
Pellet; Pyrolysis; Kinetics; Coast Redfern; DAEM; PRESSURIZED TORREFACTION; THERMAL-DEGRADATION; NITROGEN; BEHAVIOR; K(0)(E); REMOVAL; STALK; F(E); AIR;
D O I：
10.1016/j.biortech.2019.122099
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this study, the pyrolysis behavior and kinetics of raw biomasses and their pellets were studied by Coats Redfern and DAEM methods. The results demonstrated that the similar activation energies obtained by both methods confirmed accuracy of the kinetics calculation. The activation energy of the pellets was 132.49-232.44 kJ mol(-1), slightly higher than those of raw biomasses, which was 120.58-210.55 kJ mol(-1). The results from Coats Redfern method showed that the pyrolysis of all the samples were controlled by mass and heat diffusion. DAEM revealed that the activation energies of the pellets were higher than those of raw biomasses during hemicellulose and cellulose decomposition stages, and was opposite for the lignin decomposition stage. Physical structure characterization indicated that the pellets had smaller surface area and more compact surface than those of their raw biomasses. Hence, the mass and heat diffusion were suppressed and more cross-linking reactions occurred during pellets pyrolysis.
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页数：8
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