Study on sub-critical water mediated hydrolysis of Miscanthus a lignocellulosic biomass

Study on sub-critical water mediated hydrolysis of Miscanthus a lignocellulosic biomass

► Study on Sub-CW combined with ethanol and CO 2 to delignify and solubilise Miscanthus. ► Temperature shows the greatest effect in delignification and solubilisation. ► Maximum solubilisation and delignification obtained of 53% and 86% respectively. ► SEM analysis show at these hydrolysis condition...

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Bibliographic Details
Published in:Resources, conservation and recycling Vol. 59; pp. 43 - 46
Main Authors: Roque, R.M.N., Baig, M.N., Leeke, G.A., Bowra, S., Santos, R.C.D.
Format: Journal Article Conference Proceeding
Language:English
Published: Kidlington Elsevier B.V 01-02-2012
Elsevier
Subjects:
Applied sciences
Biomass
Carbon dioxide
Cellulose
cellulosic fibers
Delignification
Exact sciences and technology
Fibers
Fibres
Hydrolysis
Lignin
lignocellulose
Mathematical analysis
Miscanthus
Miscanthus χ giganteus
Pollution
recycling
Scanning electron microscopy
solubilization
solvents
Sub-critical water
temperature
Hydrolysis
Lignin
Sub-critical water
Delignification
Miscanthus χ giganteus
Carbon dioxide
Scanning electron microscopy
Miscanthus X giganteus
Biomass
Operating conditions
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Summary:► Study on Sub-CW combined with ethanol and CO 2 to delignify and solubilise Miscanthus. ► Temperature shows the greatest effect in delignification and solubilisation. ► Maximum solubilisation and delignification obtained of 53% and 86% respectively. ► SEM analysis show at these hydrolysis conditions cellulose fibres are not destroyed. The present study was undertaken to evaluate the impact of sub-critical water (Sub-CW) processing parameters, such as temperature and biomass:Sub-CW:ethanol:CO 2 ratio, in order to optimise the delignification of the Miscanthus χ giganteus, a lignocellulosic biomass. The percentage lignin solubilised (delignification) was calculated by measuring the amount of lignin, using the Klason assay, that remained in the insoluble fraction. The amount of biomass solubilised was determined by calculating the difference between the initial weight of biomass and the weight of the residual insoluble fraction. Experimental results showed a maximum solubilisation and delignification of 53% and 86% respectively at 200 °C and biomass/solvent ratio of 1:100, i.e., 2.5 g in 250 ml of water:ethanol mixture (50:50). Scanning Electron Microscopy (SEM) images were taken to analyse the effect of hydrolysis on cellulose fibres structure. The results showed the residual fibres appeared intact, with some lignin globules attached to them. Consequently, it was concluded that the use of Sub-CW:ehanol:CO 2 mediated hydrolysis under the stated operating conditions supported delignification without destroying the cellulose fibres.
Bibliography:http://dx.doi.org/10.1016/j.resconrec.2011.06.007
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0921-3449
1879-0658
DOI:10.1016/j.resconrec.2011.06.007