کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1063362 | 1485730 | 2012 | 4 صفحه PDF | دانلود رایگان |

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:CO2 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:CO2 mediated hydrolysis under the stated operating conditions supported delignification without destroying the cellulose fibres.
► Study on Sub-CW combined with ethanol and CO2 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.
Journal: Resources, Conservation and Recycling - Volume 59, February 2012, Pages 43–46