Pyrolysis characteristics and kinetics of aquatic biomass using thermogravimetric analyzer.
The differences in pyrolysis process of three species of aquatic biomass (microalgae, macroalgae and duckweed) were investigated by thermogravimetric analysis (TGA). Three stages were observed during the pyrolysis process and the main decomposition stage could be divided further into three zones. The pyrolysis characteristics of various biomasses were different at each zone, which could be attributed to the differences in their components. A stepwise procedure based on iso-conversional and master-plots methods was used for the kinetic and mechanism analysis of the main decomposition stage. The calculation results based on the kinetic model was in good agreement with the experimental data of weight loss, and each biomass had an increasing activation energy of 118.35-156.13 kJ/mol, 171.85-186.46 kJ/mol and 258.51-268.71 kJ/mol in zone 1, 2 and 3, respectively. This study compares the pyrolysis behavior of various aquatic biomasses and provides basis for further applications of the biomass thermochemical conversion.
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China.
Kejing
K
Wu
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China.
Ji
J
Liu
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China; Beijing Engineering Research Center for Biofuels, Beijing 100084, PR China. Electronic address: wylong@tsinghua.edu.cn.
Yulong
Y
Wu
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China.
Yu
Y
Chen
Shandong U-Force Biofuel Technology Co., Ltd., Shandong 277000, PR China. Electronic address: Ge01@realforce.cn.
Qinghai
Q
Li
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100084, PR China.
Xin
X
Xiao
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China.
Mingde
M
Yang
D018533:Biomass; D007700:Kinetics; D008962:Models, Theoretical; D013818:Thermogravimetry / Q000295:instrumentation*
Aquatic biomass; Chemical component; Multi-zone process; Pyrolysis; Thermogravimetric analysis