Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect

The production of bio-oil from palm kernel shell (PKS) via subcritical and supercritical hydrothermal liquefaction was investigated. In order to maximize the bio-oil yield, design of experiment and optimization was performed using Response Surface Methodology (RSM) with central composite rotatable d...

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Main Authors: Chan, Y.H., Quitain, A.T., Yusup, S., Uemura, Y., Sasaki, M., Kida, T.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.21733 /
Published: Elsevier B.V. 2018
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021833278&doi=10.1016%2fj.supflu.2017.06.007&partnerID=40&md5=b934cc5745fefda0caa2233ed843a37a
http://eprints.utp.edu.my/21733/
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spelling utp-eprints.217332018-10-23T00:56:17Z Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect Chan, Y.H. Quitain, A.T. Yusup, S. Uemura, Y. Sasaki, M. Kida, T. The production of bio-oil from palm kernel shell (PKS) via subcritical and supercritical hydrothermal liquefaction was investigated. In order to maximize the bio-oil yield, design of experiment and optimization was performed using Response Surface Methodology (RSM) with central composite rotatable design (CCRD). Four factors which included temperature (330�390 °C), pressure (25�35 MPa), reaction time (60�120 min) and biomass-to-water ratio (0.20-0.50 wt/wt) were investigated. The regression model developed gave accurate predictions and fitted well with the experimental results, with coefficient of determination R2 of 0.9109. Based on the model, the optimum liquefaction condition was predicted to be at temperature of 390 °C, pressure of 25 MPa, reaction time of 60 min and biomass-to-water ratio of 0.20 with a prediction yield of 15.48 wt. This condition was validated by experimental runs which produced an average of 14.44 wt bio-oil yield. Then, the mediation effect of supercritical CO2 on bio-oil yield was studied. Hydrothermal liquefaction of PKS was performed at the optimum condition in the presence of supercritical CO2. The effect of supercritical CO2 was found to be insignificant at higher liquefaction temperature of 390 °C but it was significant at lower liquefaction temperature of 300 °C, producing bio-oil yield of 11.35 wt. GC/MS analysis showed that phenolic compounds constituted the major portion of the bio-oils, while ketones, aromatic compounds and carboxylic acid were also detected. © 2017 Elsevier B.V. Elsevier B.V. 2018 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021833278&doi=10.1016%2fj.supflu.2017.06.007&partnerID=40&md5=b934cc5745fefda0caa2233ed843a37a Chan, Y.H. and Quitain, A.T. and Yusup, S. and Uemura, Y. and Sasaki, M. and Kida, T. (2018) Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect. Journal of Supercritical Fluids, 133 . pp. 640-646. http://eprints.utp.edu.my/21733/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The production of bio-oil from palm kernel shell (PKS) via subcritical and supercritical hydrothermal liquefaction was investigated. In order to maximize the bio-oil yield, design of experiment and optimization was performed using Response Surface Methodology (RSM) with central composite rotatable design (CCRD). Four factors which included temperature (330�390 °C), pressure (25�35 MPa), reaction time (60�120 min) and biomass-to-water ratio (0.20-0.50 wt/wt) were investigated. The regression model developed gave accurate predictions and fitted well with the experimental results, with coefficient of determination R2 of 0.9109. Based on the model, the optimum liquefaction condition was predicted to be at temperature of 390 °C, pressure of 25 MPa, reaction time of 60 min and biomass-to-water ratio of 0.20 with a prediction yield of 15.48 wt. This condition was validated by experimental runs which produced an average of 14.44 wt bio-oil yield. Then, the mediation effect of supercritical CO2 on bio-oil yield was studied. Hydrothermal liquefaction of PKS was performed at the optimum condition in the presence of supercritical CO2. The effect of supercritical CO2 was found to be insignificant at higher liquefaction temperature of 390 °C but it was significant at lower liquefaction temperature of 300 °C, producing bio-oil yield of 11.35 wt. GC/MS analysis showed that phenolic compounds constituted the major portion of the bio-oils, while ketones, aromatic compounds and carboxylic acid were also detected. © 2017 Elsevier B.V.
format Article
author Chan, Y.H.
Quitain, A.T.
Yusup, S.
Uemura, Y.
Sasaki, M.
Kida, T.
spellingShingle Chan, Y.H.
Quitain, A.T.
Yusup, S.
Uemura, Y.
Sasaki, M.
Kida, T.
Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect
author_sort Chan, Y.H.
title Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect
title_short Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect
title_full Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect
title_fullStr Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect
title_full_unstemmed Optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect
title_sort optimization of hydrothermal liquefaction of palm kernel shell and consideration of supercritical carbon dioxide mediation effect
publisher Elsevier B.V.
publishDate 2018
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021833278&doi=10.1016%2fj.supflu.2017.06.007&partnerID=40&md5=b934cc5745fefda0caa2233ed843a37a
http://eprints.utp.edu.my/21733/
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score 11.62408

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