Thermogravimetric kinetics and pyrolytic tri-state products analysis towards insights into understanding the pyrolysis mechanism of Spirulina platensis with calcium oxide. (January 2022)

• Record Type: Journal Article
• Authors: Hu, Mian; Zhang, Haiyang; Ye, Zhiheng; Ma, Jiajia; Chen, Zhihua; Wang, Junliang; Wang, Cheng; Pan, Zhiyan
• Is Part Of: Renewable energy. Volume 184(2022)
• Page Start: 498
• Page End: 509
• Publication Date: 2022-01
• Subjects: Thermogravimetric kinetic -- Pyrolytic tri-state products -- Pyrolysis -- Spirulina platensis -- Calcium oxide; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2021.11.085
• Languages: English
• ISSNs: 0960-1481

Abstract

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 A 0 = 1.99E+10s −1 and f ( α ) = − 1 / l n ( 1 − α ) with A 0 = 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. Graphical abstract: Image 1