Hydrolysis/dehydration/aldol-condensation/hydrogenation of lignocellulosic biomass and biomass-derived carbohydrates in the presence of Pd/WO3-ZrO2 in a single reactor
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Author list: Dedsuksophon W., Faungnawakij K., Champreda V., Laosiripojana N.
Publisher: Elsevier
Publication year: 2011
Journal: Bioresource Technology (0960-8524)
Volume number: 102
Issue number: 2
Start page: 2040
End page: 2046
Number of pages: 7
ISSN: 0960-8524
Languages: English-Great Britain (EN-GB)
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Abstract
Hydrolysis/dehydration/aldol-condensation/hydrogenation of lignocellulosic-biomass (corncobs) and biomass-derived carbohydrates (tapioca flour) to produce water-soluble C5-C15 compounds was developed in a single reactor system. WO3-ZrO2 efficiently catalyzed the hydrolysis/dehydration of these feedstocks to 5-hydroxymethylfurfural and furfural, while the impregnation of WO3-ZrO2 with Pd allowed sequential aldolcondensation/hydrogenation of these furans to C5-C15 compounds. The highest C5-C15 yields of 14.8-20.3% were observed at a hydrolysis/dehydration temperature of 573K for 5min, an aldol-condensation temperature of 353K for 30h, and a hydrogenation temperature of 393K for 6h. The C5-C15 yield from tapioca flour was higher than that from corncobs (20.3% compared to 14.8%). Tapioca flour produced more C6/C9/C15, whereas corncobs generated more C5/C8/C13 compounds due to the presence of hemicellulose in the corncobs. These water-soluble organic compounds can be further converted to liquid alkanes with high cetane numbers for replacing diesel fuel in transportation applications. ฉ 2010 Elsevier Ltd.
Keywords
Alkane, Biomass-derived carbohydrate, Furan, Pd/WO3-ZrO2
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