Microwave-assisted solubilization of microalgae in high-temperature ethylene glycol

Shuntaro Tsubaki, Kiriyo Oono, Ayumu Onda, Takashi Kadono, Masao Adachi, Tomohiko Mitani

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)


Four types of microalgae (Chlorella vulgaris, Nannochloropsis oculata, Fistsulifera solaris (JPCC DA0580), and Phaeodactylum tricornutum Strain NRIA-065) were liquefied through noncatalytic solvothermal solubilization under microwave (MW) irradiation using ethylene glycol (EG) as a reaction media. C. vulgaris and N. occulata exhibited higher solubilization rates and bio-crude oil yields in a temperature range at 300 °C while diatoms (Fistsulifera. Solaris and Phaeodactylum tricornutum) were recalcitrant to MW treatment owing to its high ash content. Bio-crude oil yield increased depending on the reaction temperature and reaction time. In particular, nearly 38% bio-crude oil was obtained under a reaction at 300 °C for 40–60 min from C. vulgaris. Higher heating values of bio-crude oil of 39 and 28 MJ kg−1 were attained in the chloroform and ethyl acetate layers in EG soluble fraction, respectively. Dielectric measurement of the reaction system indicated the effectiveness of ethylene glycol as a medium for absorbing MW energy. EG was efficient reaction medium for rapid heating up by MWs to facilitate solubilization of microalgae at low pressure.

ジャーナルBiomass and Bioenergy
出版ステータス出版済み - 11月 2019

!!!All Science Journal Classification (ASJC) codes

  • 林業
  • 再生可能エネルギー、持続可能性、環境
  • 農業および作物学
  • 廃棄物管理と処理


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