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Production and characterization of bio-oil from hydrothermal liquefaction of microalgae Dunaliella tertiolecta cake

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  • Shuping, Zou
  • Yulong, Wu
  • Mingde, Yang
  • Kaleem, Imdad
  • Chun, Li
  • Tong, Junmao

Abstract

Renewable fuels are major alternatives to conventional fossil fuels. Biomass in the form of agricultural and industrial residues is fast becoming popular among new renewable energy sources. Hydrothermal liquefaction can thermochemically convert biomass residues into bio-oil. This work investigates the hydrothermal liquefaction of microalgae Dunaliella tertiolecta cake under various liquefaction temperatures, holding times, and catalyst dosages. A maximum bio-oil yield of 25.8% is obtained at a reaction temperature of 360°C and a holding time of 50min using 5% Na2CO3 as a catalyst. The various physical and chemical characteristics of bio-oil obtained under the most suitable conditions are determined, and a detailed chemical compositional analysis of bio-oil is performed using an elemental analyzer, Fourier transform-infrared spectroscopic analysis (FT-IR), and gas chromatography–mass spectrometry (GC–MS). The bio-oil is composed of fatty acids, fatty acid methyl esters, ketones, and aldehydes. Its empirical formula is CH1.44O0.29N0.05, and its heating value is 30.74MJ/kg. The bio-oil product is a possible eco-friendly green biofuel and chemical.

Suggested Citation

  • Shuping, Zou & Yulong, Wu & Mingde, Yang & Kaleem, Imdad & Chun, Li & Tong, Junmao, 2010. "Production and characterization of bio-oil from hydrothermal liquefaction of microalgae Dunaliella tertiolecta cake," Energy, Elsevier, vol. 35(12), pages 5406-5411.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:12:p:5406-5411
    DOI: 10.1016/j.energy.2010.07.013
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    References listed on IDEAS

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    1. Zhong, Chongli & Wei, Xiaomin, 2004. "A comparative experimental study on the liquefaction of wood," Energy, Elsevier, vol. 29(11), pages 1731-1741.
    2. Qian, Yejian & Zuo, Chengji & Tan, Jian & He, Jianhui, 2007. "Structural analysis of bio-oils from sub-and supercritical water liquefaction of woody biomass," Energy, Elsevier, vol. 32(3), pages 196-202.
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