2020年7月21日
Catalytic pyrolysis of spirulina platensis residue (SPR): Thermochemical behavior and kinetics
International Journal of Technology
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- 巻
- 11
- 号
- 3
- 開始ページ
- 522
- 終了ページ
- 531
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.14716/ijtech.v11i3.2967
The pyrolysis characteristics of Spirulina platensis residue (SPR) with silica-alumina catalysts were investigated using thermogravimetric analysis (TGA). The effects of differing amounts of catalysts on thermochemical behavior and kinetics parameters (pre-exponential factor in Arrhenius equation [A] and activation energy [Ea]) were studied. The experiment was carried out from 30 to 1000° at a heating rate of 20°/min for the case of non-catalytic and catalytic pyrolysis (silica-alumina). For the catalytic pyrolysis, also of interest were the catalyst-to-SPR weight ratios of 1:1 and 1:2. The TGA curve and differential thermogravimetric peak analysis results suggest that the use of catalysts in pyrolysis (particularly at a catalyst-to-SPR weight ratio of 1:1) reduces both pyrolysis time and temperature range to 14.68 min and 230-555°, respectively. The kinetic parameters were then calculated in a one-step global non-isothermal model and solved using a least squares method in MATLAB. The presence of catalyst was able to reduce Ea to the lowest value from 41.10 kJ/mol (without catalyst) to 40.77 kJ/mol (weight ratio of 1:2) and 39.46 kJ/mol (weight ratio of 1:1) in Zone 1. However, the increase of catalyst quantity was not in line with the increase of reaction rate constant (k) and resulted in reasonably low A of, respectively, 593.30, 406.31, and 266.37.
- リンク情報
- ID情報
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- DOI : 10.14716/ijtech.v11i3.2967
- ISSN : 2086-9614
- eISSN : 2087-2100
- SCOPUS ID : 85088499177