Bio-oil production from oil palm biomass via subcritical and supercritical hydrothermal liquefaction

Chan, Yi Herng; Yusup, Suzana; Quitain, Armando T.; Uemura, Yoshimitsu; Sasaki, Mitsuru

doi:10.1016/j.supflu.2014.10.014

Cited by 112 publications

(64 citation statements)

References 32 publications

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“…In Fig. 5(b), the broad peak of weight loss was between 300 and 370 °C, with a maximum rate of weight loss occurring at 359 °C, possibly contributed by the simultaneous thermal decomposition of hemicellulose and cellulose (Chan et al 2014). For the SR, a slight decrease in weight occurred between 318 and 521 °C, which corresponded to the decomposition of lignin and the crystal water in the residual dystectic PTA (Ninomiya et al 2011).…”

Section: Tg and Dtg Analysismentioning

confidence: 92%

Liquefaction of Fir Sawdust in Supercritical Ethanol with Dissolved Phosphotungstic Acid

ChangWei¹,

Zheng²,

Lv³

et al. 2015

BioResources

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An environmentally benign approach is put forward with the focus on directly liquefying and depolymerizing Cunninghamia lanceolata (Lamb.) Hook. (Chinese fir) sawdust into ethyl levulinate (EL) under supercritical ethanol (scEtOH) conditions by using phosphotungstic acid (PTA) as a catalyst. The effects of parameters such as catalyst dosage, temperature, and reaction time on alcoholysis yield were investigated. The experimental results show that the biomass alcoholysis yield reached 95.35% with 0.5 g PTA as a catalyst at 260 °C for 30 min. Alcoholysis yield and quantitative content of EL depended on the catalyst. The light bio-oil was primarily composed of phenols, aldehydes, ketones, and esters. A high quantitative content of EL up to 20.82% (AR, Relative abundance) was achieved, compared to 0.73% AR when PTA was not added. Hence, scEtOH with dissolved PTA may offer novel media for both chemical reactions and biomass conversion technology as a replacement for environmentally undesirable organic solvents.

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Section: Tg and Dtg Analysismentioning

confidence: 92%

Liquefaction of Fir Sawdust in Supercritical Ethanol with Dissolved Phosphotungstic Acid

ChangWei¹,

Zheng²,

Lv³

et al. 2015

BioResources

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“…Increasing the water ratio at supercritical water condition water is able to penetrate more efficiently into the tested pyrolysis oil, achieving higher degrees of oil upgrading [47].…”

Section: The Effect Pyrolysis Oil To Water Mass Ratio On Conversion Amentioning

confidence: 99%

“…In addition, the low dielectric constant of supercritical water increases the solvation power of water to dissolve and extract organic materials which are normally water insoluble, hence supercritical water has enhanced solubility for organic compounds compared to a conventional liquid or gas solvent [47].…”

Section: The Effect Pyrolysis Oil To Water Mass Ratio On Conversion Amentioning

confidence: 99%

“…Higher pressure is known to increase the solvent density and solubility of the target components, allowing solvent to penetrate more efficiently into the molecular structure, enhancing the extraction of bio-oil components, and yielding greater amounts of heavy oil [47] whilst at the same time possibly suppressing cracking to lighter oil.…”

Section: The Effect Of Reaction Pressurementioning

confidence: 99%

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Pyrolysis oil upgrading in high conversions using sub- and supercritical water above 400 °C

Isa

Snape

Uguna

et al. 2016

Journal of Analytical and Applied Pyrolysis

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(2016) Pyrolysis oil upgrading in high conversions using suband supercritical water above 400°C. Journal of Analytical and Applied Pyrolysis, 119 . pp. 180-188. ISSN 0165-2370 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/34433/1/Isa%202016%20-%20JAAP.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the Creative Commons Attribution Non-commercial No Derivatives licence and may be reused according to the conditions of the licence. For more details see: http://creativecommons.org/licenses/by-nc-nd/2.5/ A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe upgrading of pyrolysis oil to bio-fuel was investigated using sub-and supercritical water at 410 and 450 o C, with a high mass ratio of water to pyrolysis oil to ascertain the maximum yields that could be achieved. The results indicate that conversions increased with increasing pyrolysis oil to water mass ratio at high water ratio under supercritical water conditions at 410 o C, gave the highest products conversion of ~91 wt. %, with 28 wt. % heavy oil recovered, ~23 wt. % gas yield, 27 wt. % water generated and approximately 13-14 wt. % of light oil produced. Similar product conversion was obtained using biomass as a feedstock with slightly higher water mass ratio added into the reactor (R1:15), and slightly lower heavy oil yield was recovered (21 wt. %). Gas generation was observed to % of water generated. The oxygen contents of the heavy oil recovered were ~15-16 % (for 410 and 450 o C), with H/C atomic ratios of 1.1. Similar overall conversions were achieved using tetralin with much lower solvent to oil ratios were needed and the liquid products had a slightly lower oxygen 2 content (14 %). The estimated hydrogen from water was estimated as ca. 0.3 % at 410 and 450 o C in high conversions of pyrolysis oil experiments, and experiments with tetralin/1-methyl naphthalene provide evidence that a small amount of hydrogen was sufficient to achieve high product conversion, giving an increase of H element content from 7.0 % to 7.3 %.

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“…Common green solvent used in biomass liquefaction is water since it is readily available, cheap, and non-toxic 12) . However, its extreme condition (TC = 374 °C, PC = 22.1 MPa) is a major challenge 13) .…”

Section: Introductionmentioning

confidence: 99%

Furfural Production Under Subcritical Alcohol Conditions: Effect of Reaction Temperature, Time, and Types of Alcohol

Mohamad

Yusof

Yong

2017

J. Jpn. Inst. Energy

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Oil palm fronds (OPF) are potential resources for production of biomass-based chemicals such as furfural, levulinic acid, and 5-HMF due to its large abundance. Although there are various conventional methods for biomass conversion, they suffer from low yields as well as extreme reaction severity due to the usage of mineral acids as catalyst. A new method using subcritical alcohol can be an alternative. Hence, the aim of this study is to determine the feasibility of using subcritical alcohol for furfural production from OPF. The study will also determine the effect of reaction parameters such as reaction temperature, time, and types of alcohol towards the yield. From the study, it is concluded that high furfural yield can be achieved at milder temperature and moderate reaction time under subcritical conditions. The yield obtained is comparable with other conventional methods indicating that subcritical alcohol technology has the potential for furfural production.

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Bio-oil production from oil palm biomass via subcritical and supercritical hydrothermal liquefaction

Cited by 112 publications

References 32 publications

Liquefaction of Fir Sawdust in Supercritical Ethanol with Dissolved Phosphotungstic Acid

Liquefaction of Fir Sawdust in Supercritical Ethanol with Dissolved Phosphotungstic Acid

Pyrolysis oil upgrading in high conversions using sub- and supercritical water above 400 °C

Furfural Production Under Subcritical Alcohol Conditions: Effect of Reaction Temperature, Time, and Types of Alcohol

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