TY - JOUR UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020782378&doi=10.1016%2fj.joei.2017.05.009&partnerID=40&md5=2997a04be8e0a1d7edc13ca204464e23 PB - Elsevier B.V. SP - 721 IS - 5 N1 - cited By 27 A1 - Chan, Y.H. A1 - Quitain, A.T. A1 - Yusup, S. A1 - Uemura, Y. A1 - Sasaki, M. A1 - Kida, T. Y1 - 2018/// SN - 17439671 TI - Liquefaction of palm kernel shell in sub- and supercritical water for bio-oil production ID - scholars9927 AV - none VL - 91 JF - Journal of the Energy Institute N2 - The heavy palm oil industry in Malaysia has generated various oil palm biomass residues. These residues can be converted into liquids (bio-oil) for replacing fossil-based fuels and chemicals. Studies on the conversion of these residues to bio-oil via pyrolysis technology are widely available in the literature. However, thermochemical liquefaction of oil palm biomass for bio-oil production is rarely studied and reported. In this study, palm kernel shell (PKS) was hydrothermally liquefied under subcritical and supercritical conditions to produce bio-oil. Effects of reaction temperature, pressure and biomass-to-water ratio on the characteristics of bio-oil were investigated. The bio-oils were analyzed for their chemical compositions (by GC�??MS and FT-IR) and higher heating values (HHV). It was found that phenolic compounds were the main constituents of bio-oils derived from PKS for all reaction conditions investigated. Based on the chemical composition of the bio-oil, a general reaction pathway of hydrothermal liquefaction of PKS was postulated. The HHV of the bio-oils ranged from 10.5 to 16.1 MJ/kg, which were comparable to the findings reported in the literature. © 2017 Energy Institute KW - Biofuels; Biomass; Calorific value; Chemical analysis; Liquefaction; Reaction kinetics KW - Bio oil; Chemical compositions; Higher heating value; Hydrothermal liquefactions; Reaction postulation; Reaction temperature; Sub- and supercritical waters; Supercritical condition KW - Palm oil EP - 732 ER -