Journal article
Comparative evaluation of the pyrolytic and kinetic characteristics of a macroalga (Sargassum thunbergii) and a freshwater plant (Potamogeton crispus)
Fuel (Guildford), Vol.96(1), pp.185-191
06/2012
Handle:
https://hdl.handle.net/2376/111027
Abstract
► The pyrolytic characteristics of two samples were compared. ► Significant differences of the samples were observed. ► Thermal behavior is influenced greatly by the type of feedstock.
The pyrolytic and kinetic characteristics of a macroalga (Sargassum thunbergii) and a freshwater plant (Potamogeton crispus) were evaluated and compared at heating rates of 10, 30 and 50°Cmin−1 under N2 atmosphere using a thermalgravimetry (TG) and the evolved gases were analyzed online using a mass spectroscopy (MS). Three stages appeared during the pyrolysis process; dehydration, primary devolatilization and residual decomposition. Significant differences in average activation energy, thermal stability, final residuals and reaction rate existed between P. crispus and S. thunbergii. For P. crispus, the most probable mechanism was represented by a three dimensional diffusion model, whereas it was interpreted as random nucleation and nuclei growth for S. thunbergii. There were kinetic compensation effects between the pre-exponential factors and the activation energy. There was H2 evolved during the pyrolysis of P. crispus, but no obvious H2 detected for that of S. thunbergii. For CO, CO2, H2O, C1–C3 alkanes, their evolve stage were corresponding mainly with the weight loss stage. For C4–C7 alkenes and aromatic compounds, however, its evolution peak temperature zone was gradually far from the second weight loss peak temperature zone.
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Details
- Title
- Comparative evaluation of the pyrolytic and kinetic characteristics of a macroalga (Sargassum thunbergii) and a freshwater plant (Potamogeton crispus)
- Creators
- Demao Li - Tianjin Key Laboratory for Industrial Biological Systems and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, ChinaLimei Chen - Food Science Department, College of Agriculture, Liaocheng University, Liaocheng 252059, ChinaShulin Chen - Tianjin Key Laboratory for Industrial Biological Systems and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, ChinaXiaowen Zhang - Key Laboratory for Sustainable Utilization of Marine Fishery Resources, Yellow Sea Fisheries Research Institute, Qingdao 266071, ChinaFangjian Chen - Tianjin Key Laboratory for Industrial Biological Systems and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, ChinaNaihao Ye - Key Laboratory for Sustainable Utilization of Marine Fishery Resources, Yellow Sea Fisheries Research Institute, Qingdao 266071, China
- Publication Details
- Fuel (Guildford), Vol.96(1), pp.185-191
- Publisher
- Elsevier Ltd
- Identifiers
- 99900582333101842
- Language
- English
- Resource Type
- Journal article