title: Insight into the effect of hydrogenation on efficiency of hydrothermal liquefaction and physico-chemical properties of biocrude oil.
abstract: Hydrothermal liquefaction of Nannochloropsis salina (N. salina) and larvae-vermicompost were conducted under both non-hydrogenating and hydrogenating subcritical conditions using H2 and Ni-Mo/Al2O3. Hydrogenation raised biocrude yields from 33.2% to 43.5% (vermicompost) and 55.6% to 78.5% (N. salina), whereas high heat values increased from 32.89 to 34.24 MJ/kg (vermicompost) and 36.30 to 37.53 MJ/kg (N. salina). Compared with the non-hydrogenated HTL process, the contents of acids, amides, phenols, and alcohols decreased, whereas hydrocarbons content increased. More branched cyclic nitrogenous compounds were detected in the hydrogenated biocrudes, whereas the aromatic/hetero-aromatic functionality was somewhat decreased. Smaller molecular weights and polydispersity index of the hydrogenated biocrudes were also detected. Results show that hydrogenation enhanced the removal of hydrophilic functional groups and the stabilization of radicals, thereby leading to the inhibition of loss of mass toward liquid and gaseous products and the upgrading of oil quality.
authors.affiliation: College of Environmental and Resource Sciences, ZheJiang University, 886th YuHangTang Ave, HangZhou 310058, China.
authors.forename: HongYi
authors.initials: H
authors.lastname: Li
authors.affiliation: College of Environmental and Resource Sciences, ZheJiang University, 886th YuHangTang Ave, HangZhou 310058, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Hu
authors.affiliation: College of Environmental and Resource Sciences, ZheJiang University, 886th YuHangTang Ave, HangZhou 310058, China; China Academy of West Region Development, ZheJiang University, 886th YuHangTang Ave, HangZhou 310058, China. Electronic address: zhangzhijian@zju.edu.cn.
authors.forename: ZhiJian
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: College of Environmental and Resource Sciences, ZheJiang University, 886th YuHangTang Ave, HangZhou 310058, China.
authors.forename: Hang
authors.initials: H
authors.lastname: Wang
authors.affiliation: College of Environmental and Resource Sciences, ZheJiang University, 886th YuHangTang Ave, HangZhou 310058, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Ping
authors.affiliation: HangZhou TianYuan Agriculture Development Co., Ltd., HaiTuo Ave 55, XiaoShan District, HangZhou 321103, China.
authors.forename: ChangFeng
authors.initials: C
authors.lastname: Zheng
authors.affiliation: College of Environmental and Resource Sciences, ZheJiang University, 886th YuHangTang Ave, HangZhou 310058, China.
authors.forename: HaiLuo
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN 37996-2010, USA.
authors.forename: Qiang
authors.initials: Q
authors.lastname: He
mesh_terms: D018533:Biomass; D008401:Gas Chromatography-Mass Spectrometry; D006859:Hydrogen / Q000737:chemistry*; D010578:Petroleum
chemical_list: D010578:Petroleum; D006859:Hydrogen
keywords: Algae; Bioenergy; Compost; Liquefaction; Manure