Thermogravimetric kinetics and pyrolytic tri-state products analysis towards insights into understanding the pyrolysis mechanism of Spirulina platensis with calcium oxide

Mian Hu, Haiyang Zhang, Zhiheng Ye, Jiajia Ma, Zhihua Chen, Junliang Wang, Cheng Wang and Zhiyan Pan

Renewable Energy, 2022, vol. 184, issue C, 498-509

Abstract: Thermogravimetric kinetics and pyrolytic tri-state products analyses towards insights into understanding the pyrolysis mechanism of Spirulina platensis with calcium oxide were investigated using a thermogravimetric analyzer and a fixed bed reactor, respectively. The pyrolysis kinetics were studied by Friedman method and results indicated that the f(α)=(1-α)4 with A0 = 1.99E+10s−1 and f(α)=−1/ln(1−α) with A0 = 8.33E+11s−1 were suitable for Spirulina platensis and Spirulina platensis + CaO (stage II) pyrolysis, respectively. According to pyrolysis behaviors and kinetics analyzed, the potential reaction behaviors of CaO during the pyrolysis of Spirulina platensis were explored. Spirulina platensis pyrolytic tri-state products analyzed indicated that, when CaO as additive, the gas yield markedly increased with more H2, CO content and less CO2 content and the bio-oil yield significantly decreased. Moreover, the contents of aromatic compounds, aliphatic compounds, phenols and ketons obviously increased in bio-oil with the appreciably decreased in the contents of esters, N-containing compounds, O-containing compounds and acids. Based on the evolutionary mechanism of CaO and pyrolytic tri-state products, the pyrolysis mechanism of Spirulina platensis with calcium oxide was proposed.

Keywords: Thermogravimetric kinetic; Pyrolytic tri-state products; Pyrolysis; Spirulina platensis; Calcium oxide (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:184:y:2022:i:c:p:498-509

DOI: 10.1016/j.renene.2021.11.085

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