Co-liquefaction of microalgae and lignocellulosic biomass in subcritical water

Bioresource Technology
Chao GaiZhengang Liu

Abstract

This study investigated co-liquefaction of microalgae (Chlorella pyrenoidosa, CP) and lignocellulosic biomass (Rice husk, RH) in subcritical water for bio-oil production. The effects of liquefaction temperature (200-350°C), residence time (10-90min), solid concentration (10-30wt.%) and mass ratio of CP/RH on product distribution were investigated. The results showed that the highest yield of bio-crude oils at the combination of 50% CP with 50% RH was obtained at 300°C temperature, 60min residence time and 20wt.% solid concentration. The oil yields increased gradually with the increased mass ratio of CP/RH. The major compounds identified in bio-crude oils from hydrothermal liquefaction (HTL) of RH were cyclic oxygenates (20.62%), followed by esters, ketones and alcohols (17.19%). As for CP, the main components were straight & branched amides (28.38%). A synergistic interaction was observed between CP and RH during co-liquefaction, resulting in decreased acidity and nitrogen content of bio-crude oils.

References

Feb 22, 2012·Bioresource Technology·Mehmet K AkalınSelhan Karagöz

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Citations

Jul 3, 2015·Bioresource Technology·Seong-Heon ChoEilhann E Kwon
Dec 12, 2018·BioMed Research International·Selvakumar ThiruvenkadamRazif Harun
Mar 4, 2019·Journal of Environmental Management·Yuzhen WangShuzhong Wang
May 18, 2019·The Science of the Total Environment·Yi Herng ChanSue Lin Ngan
Aug 21, 2021·Bioresource Technology·Ruetai SaengsuriwongNakorn Tippayawong

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