Effects of Kraft lignin on hydrolysis/dehydration of sugars, cellulosic and lignocellulosic biomass under hot compressed water
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Author list: Daorattanachai P., Viriya-empikul N., Laosiripojana N., Faungnawakij K.
Publisher: Elsevier
Publication year: 2013
Journal: Bioresource Technology (0960-8524)
Volume number: 144
Start page: 504
End page: 512
Number of pages: 9
ISSN: 0960-8524
Languages: English-Great Britain (EN-GB)
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Abstract
The effect of Kraft lignin presenting on the hydrolysis and dehydration of C5 and C6 sugars, cellulose, hemicelluloses and biomass under hot compressed water (HCW) in the presence of H3PO4 catalyst was intensively studied. The lignin strongly inhibited the acid hydrolysis of cellulose and hemicellulose to glucose and xylose, respectively. Interestingly, the admixed lignin markedly promoted the isomerization of glucose to fructose, and dehydration of fructose (except at the low catalyst loading), resulting in high 5-hydroxymethylfurfural yields. Nonetheless, lignin inhibited the hydrolysis of xylan to xylose and dehydration of xylose to furfural. Moreover, the acidity of the system significantly affects the hydrolysis/dehydration of biomass. It was revealed that the presence of lignin strongly interfered the yields of sugars and furans produced from raw corncob, while the delignified corncob provided significant improvement of product yields, confirming the observed role of lignin in the biomass conversion system via sugar platforms. ฉ 2013 Elsevier Ltd.
Keywords
Furan compounds
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