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Thermogravimetric analysis of microalgae combustion under different oxygen supply concentrations

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  • Chen, Chunxiang
  • Ma, Xiaoqian
  • Liu, Kai

Abstract

Recently, studies of microalgae in China have increased a lot because of their obvious advantages over other biological fuels. In this paper, the combustion behavior of Chlorella vulgaris (a genus of unicellular green microalgae) was investigated in a thermogravimetric analyzer (TGA) from room temperature to 800°C in O2/N2 atmospheres. The effects of different oxygen concentrations (20, 50, 60, 80vol.%) and different heating rates (10, 20 and 40°Cmin−1) on the combustion processes of C. vulgaris had been studied. The results indicated that the combustion processes of C. vulgaris could be divided into three stages. The oxygen concentrations and heating rates had important effects on the main combustion processes of C. vulgaris. The iso-conversional method involving Flynn–Wall–Ozawa (FWO) and the Kissinger–Akahira–Sunose (KAS) methods were used for the kinetic analysis of the main combustion process. The results indicated that, when the oxygen concentration varied from 20 to 80vol.%, the value of activation energy increased respectively from 134.03 to 241.04kJmol−1 by using FWO method and from 134.53 to 242.33kJmol−1 by KAS method. Moreover, the optimal oxygen concentration for C. vulgaris combustion was 25–35vol.%.

Suggested Citation

  • Chen, Chunxiang & Ma, Xiaoqian & Liu, Kai, 2011. "Thermogravimetric analysis of microalgae combustion under different oxygen supply concentrations," Applied Energy, Elsevier, vol. 88(9), pages 3189-3196.
  • Handle: RePEc:eee:appene:v:88:y:2011:i:9:p:3189-3196
    DOI: 10.1016/j.apenergy.2011.03.003
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    Cited by:

    1. Marcilla, A. & Catalá, L. & García-Quesada, J.C. & Valdés, F.J. & Hernández, M.R., 2013. "A review of thermochemical conversion of microalgae," Renewable and Sustainable Energy Reviews, Elsevier, vol. 27(C), pages 11-19.
    2. repec:eee:appene:v:212:y:2018:i:c:p:786-795 is not listed on IDEAS
    3. repec:eee:rensus:v:79:y:2017:i:c:p:850-866 is not listed on IDEAS
    4. Giostri, A. & Binotti, M. & Macchi, E., 2016. "Microalgae cofiring in coal power plants: Innovative system layout and energy analysis," Renewable Energy, Elsevier, vol. 95(C), pages 449-464.
    5. Söyler, Nejmi & Goldfarb, Jillian L. & Ceylan, Selim & Saçan, Melek Türker, 2017. "Renewable fuels from pyrolysis of Dunaliella tertiolecta: An alternative approach to biochemical conversions of microalgae," Energy, Elsevier, vol. 120(C), pages 907-914.
    6. Raheem, Abdul & Wan Azlina, W.A.K.G. & Taufiq Yap, Y.H. & Danquah, Michael K. & Harun, Razif, 2015. "Thermochemical conversion of microalgal biomass for biofuel production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 49(C), pages 990-999.
    7. Rizzo, Andrea Maria & Prussi, Matteo & Bettucci, Lorenzo & Libelli, Ilaria Marsili & Chiaramonti, David, 2013. "Characterization of microalga Chlorella as a fuel and its thermogravimetric behavior," Applied Energy, Elsevier, vol. 102(C), pages 24-31.
    8. López-González, D. & Fernandez-Lopez, M. & Valverde, J.L. & Sanchez-Silva, L., 2014. "Kinetic analysis and thermal characterization of the microalgae combustion process by thermal analysis coupled to mass spectrometry," Applied Energy, Elsevier, vol. 114(C), pages 227-237.
    9. Comesaña, R. & Gómez, M.A. & Álvarez Feijoo, M.A. & Eguía, P., 2013. "CFD simulation of a TG–DSC furnace during the indium phase change process," Applied Energy, Elsevier, vol. 102(C), pages 293-298.
    10. Wu, Keng-Tung & Tsai, Chia-Ju & Chen, Chih-Shen & Chen, Hsiao-Wei, 2012. "The characteristics of torrefied microalgae," Applied Energy, Elsevier, vol. 100(C), pages 52-57.
    11. Watanabe, Hideo & Li, Dalin & Nakagawa, Yoshinao & Tomishige, Keiichi & Kaya, Kunimitsu & Watanabe, Makoto M., 2014. "Characterization of oil-extracted residue biomass of Botryococcus braunii as a biofuel feedstock and its pyrolytic behavior," Applied Energy, Elsevier, vol. 132(C), pages 475-484.
    12. Ferreira, L.S. & Rodrigues, M.S. & Converti, A. & Sato, S. & Carvalho, J.C.M., 2012. "Arthrospira (Spirulina) platensis cultivation in tubular photobioreactor: Use of no-cost CO2 from ethanol fermentation," Applied Energy, Elsevier, vol. 92(C), pages 379-385.
    13. Ferreira, A.F. & Soares Dias, A.P. & Silva, C.M. & Costa, M., 2015. "Evaluation of thermochemical properties of raw and extracted microalgae," Energy, Elsevier, vol. 92(P3), pages 365-372.

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