High conversions of miscanthus using sub- and supercritical water above 400°C

Isa, Khairuddin Md; Snape, Colin E.; Uguna, Clement N.; Meredith, Will

doi:10.1016/j.jaap.2015.04.014

Cited by 16 publications

(18 citation statements)

References 30 publications

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“…The findings for the bio-oil displayed many similar trends to those which have been previously identified for biomass pyrolysis [44]. Approximately 91 wt.% conversion was obtained for both 5.…”

Section: Comparison Of Bio-oil Upgrading With Biomass Pyrolysissupporting

confidence: 84%

“…The same assumption of hydrogen donation has been made as in the previous study [44]. The hydrogen donation in the pyrolysis oil upgrading has been calculated and presented in Table 7.…”

Section: Gas Composition and Utilisation Of Water Hydrogenmentioning

confidence: 96%

“…The protocol used to obtain the supercritical water conditions was the same as described in a previous study [44]. A series of blank runs with water (20, 22 and 24 ml) using the 75 ml vessel were conducted to determine the baseline data for subcritical and supercritical conditions.…”

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

confidence: 99%

“…%). The yields of water were estimated from oxygen balances to check against the measured value in the case of tetralin and the assumed values of the anhydrous yield for the hydrous experiments as performed in the previous work [44]. The pyrolysis oil upgrading with anhydrous pyrolysis conducted at 410 o C produced 11.3% of water.…”

Section: The Effect Of Other Solventsmentioning

confidence: 99%

“…%, as a result of the hydrogen donated from the solvent [43]. As for biomass conversion in our previous study [44], hydrogen donation from both water and tetralin, and the effect on oxygen removal were quantified. The same approach as previously was used for pyrolysis oil upgrading to ascertain the differences and similarities compared to biomass.…”

Section: Introductionmentioning

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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Section: Comparison Of Bio-oil Upgrading With Biomass Pyrolysissupporting

confidence: 84%

“…The same assumption of hydrogen donation has been made as in the previous study [44]. The hydrogen donation in the pyrolysis oil upgrading has been calculated and presented in Table 7.…”

Section: Gas Composition and Utilisation Of Water Hydrogenmentioning

confidence: 96%

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

confidence: 99%

Section: The Effect Of Other Solventsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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