title: Co-liquefaction of microalgae and lignocellulosic biomass in subcritical water.
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.
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China.
authors.forename: Chao
authors.initials: C
authors.lastname: Gai
authors.affiliation: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering (IPE), Chinese Academy of Sciences (CAS), Beijing 100190, PR China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China.
authors.forename: Nana
authors.initials: N
authors.lastname: Peng
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China.
authors.forename: Aonan
authors.initials: A
authors.lastname: Fan
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China. Electronic address: zgliu@rcees.ac.cn.
authors.forename: Zhengang
authors.initials: Z
authors.lastname: Liu
mesh_terms: D000577:Amides / Q000737:chemistry; D056804:Biofuels; D018533:Biomass; D001709:Biotechnology; D002708:Chlorella; D008031:Lignin / Q000737:chemistry*; D058086:Microalgae; D009584:Nitrogen / Q000737:chemistry; D013696:Temperature; D014867:Water / Q000737:chemistry
chemical_list: D000577:Amides; D056804:Biofuels; D014867:Water; C036909:lignocellulose; D008031:Lignin; D009584:Nitrogen
keywords: Bio-oil; Hydrothermal liquefaction; Lignocellulosic biomass; Microalgae