Ionosolv pretreatment of sugarcane bagasse and rice straw assisted by catalytic hydrothermal and microwave heating for biorefining
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Author list: Sakdaronnarong C., Jiratanakittiwat K., Tangkitthanasakul T., Laosiripojana N.
Publisher: Elsevier
Publication year: 2017
Journal: Food and Bioproducts Processing (0960-3085)
Volume number: 105
Start page: 104
End page: 116
Number of pages: 13
ISSN: 0960-3085
Languages: English-Great Britain (EN-GB)
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Abstract
The pretreatment of sugarcane bagasse (SCB) and rice straw (RS) using ionic liquids (IL) in combination with solid acid catalysts was investigated to enhance enzyme accessibility for biorefining. Both conventional hydrothermal and microwave-assisted treatments were carried out. Optimal conditions were determined in a microwave system using response surface analysis for cellulose digestibility, which was determined by the reducing sugar and glucose yield. The results demonstrate that SCB and RS fractionation in a choline acetate (ChOAc) IL catalyzed by SiO2–OSO3H in the microwave-assisted system and heterojunction metal oxides (SO42−/TiO2/Fe3O4/WO3) in the hydrothermal system significantly enhanced the cellulose digestibility. The costs of combined pretreatment and saccharification in the present study ranged from 0.60 to 1.48 €/g glucose for RS and 1.26–2.31 €/g glucose for SCB and were comparable to the previous studies. © 2017 Institution of Chemical Engineers
Keywords
Hydrothermal and microwave-assisted pretreatment, Metal oxide solid acid catalyst
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